CVE 설명

ckeditor4 plugins vulnerable to cross-site scripting caused by the editor instance destroying process

CKEditor4 is an open source what-you-see-is-what-you-get HTML editor. A cross-site scripting vulnerability has been discovered affecting Iframe Dialog and Media Embed packages. The vulnerability may trigger a JavaScript code after fulfilling special conditions: using one of the affected packages on a web page with missing proper Content Security Policy configuration; initializing the editor on an element and using an element other than `

` as a base; and destroying the editor instance. This vulnerability might affect a small percentage of integrators that depend on dynamic editor initialization/destroy mechanism.

A fix is available in CKEditor4 version 4.21.0. In some rare cases, a security fix may be considered a breaking change. Starting from version 4.21.0, the Iframe Dialog plugin applies the `sandbox` attribute by default, which restricts JavaScript code execution in the iframe element. To change this behavior, configure the `config.iframe_attributes` option. Also starting from version 4.21.0, the Media Embed plugin regenerates the entire content of the embed widget by default. To change this behavior, configure the `config.embed_keepOriginalContent` option. Those who choose to enable either of the more permissive options or who cannot upgrade to a patched version should properly configure Content Security Policy to avoid any potential security issues that may arise from embedding iframe elements on their web page.                            </div>
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                        <th><nobr>CWE-ID</nobr></th>
                        <th>약점 이름</th>
                        <th>출처</th>
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                                    <td><nobr><a href="/ko/cwe/cwe-79.html">CWE-79</a></nobr></td>
                                    <td><b>Improper Neutralization of Input During Web Page Generation</b><br>The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.</td>
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                        <th>메트릭</th>
                        <th>점수</th>
                        <th>심각도</th>
                        <th>CVSS 벡터</th>
                        <th>출처</th>
                    </tr>
                    </thead>
                    <tbody>
                    <tr>
                        <td>V3.1</td>
                        <td>4.7</td>
                        <td>MEDIUM</td>
                        <td>
                            CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N                                    <div class="m-0">
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                <span class="text-gray-700 cursor-pointer mb-0">추가 정보</span>
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                            <h4 class='bg-light border border-gray-300 rounded p-2'>Base: Exploitabilty Metrics</h4><p>The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.</p><div class='tw-h5' style='padding-left:10px'>Attack Vector</div><p style='padding-left:10px'>This metric reflects the context by which vulnerability exploitation is possible.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>Network</p></div><div style='flex: 1;margin-left:5px;'><p>The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).</p></div></div><div class='tw-h5' style='padding-left:10px'>Attack Complexity</div><p style='padding-left:10px'>This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>High</p></div><div style='flex: 1;margin-left:5px;'><p> successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected.</p></div></div><div class='tw-h5' style='padding-left:10px'>Privileges Required</div><p style='padding-left:10px'>This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>None</p></div><div style='flex: 1;margin-left:5px;'><p>The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.</p></div></div><div class='tw-h5' style='padding-left:10px'>User Interaction</div><p style='padding-left:10px'>This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>Required</p></div><div style='flex: 1;margin-left:5px;'><p>Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited. For example, a successful exploit may only be possible during the installation of an application by a system administrator.</p></div></div><h4 class='bg-light border border-gray-300 rounded p-2'>Base: Scope Metrics</h4><p>The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope.</p><div class='tw-h5' style='padding-left:10px'>Scope</div><p style='padding-left:10px'>Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>Changed</p></div><div style='flex: 1;margin-left:5px;'><p>An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.</p></div></div><h4 class='bg-light border border-gray-300 rounded p-2'>Base: Impact Metrics</h4><p>The Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve.</p><div class='tw-h5' style='padding-left:10px'>Confidentiality Impact</div><p style='padding-left:10px'>This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>Low</p></div><div style='flex: 1;margin-left:5px;'><p>There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.</p></div></div><div class='tw-h5' style='padding-left:10px'>Integrity Impact</div><p style='padding-left:10px'>This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>Low</p></div><div style='flex: 1;margin-left:5px;'><p>Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.</p></div></div><div class='tw-h5' style='padding-left:10px'>Availability Impact</div><p style='padding-left:10px'>This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>None</p></div><div style='flex: 1;margin-left:5px;'><p>There is no impact to availability within the impacted component.</p></div></div><h4 class='bg-light border border-gray-300 rounded p-2'>Temporal Metrics</h4><p>The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability.</p><h4 class='bg-light border border-gray-300 rounded p-2'>Environmental Metrics</h4><p>These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.</p>                        </div>
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                        </td>
                        <td></td>
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                        <td>V3.1</td>
                        <td>6.1</td>
                        <td>MEDIUM</td>
                        <td>
                            CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N                                    <div class="m-0">
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                    <div class="d-flex align-items-center ps-10 mb-n1">
                        <div class="text-gray-600 fs-7">
                            <h4 class='bg-light border border-gray-300 rounded p-2'>Base: Exploitabilty Metrics</h4><p>The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.</p><div class='tw-h5' style='padding-left:10px'>Attack Vector</div><p style='padding-left:10px'>This metric reflects the context by which vulnerability exploitation is possible.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>Network</p></div><div style='flex: 1;margin-left:5px;'><p>The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).</p></div></div><div class='tw-h5' style='padding-left:10px'>Attack Complexity</div><p style='padding-left:10px'>This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>Low</p></div><div style='flex: 1;margin-left:5px;'><p>Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component.</p></div></div><div class='tw-h5' style='padding-left:10px'>Privileges Required</div><p style='padding-left:10px'>This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>None</p></div><div style='flex: 1;margin-left:5px;'><p>The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.</p></div></div><div class='tw-h5' style='padding-left:10px'>User Interaction</div><p style='padding-left:10px'>This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>Required</p></div><div style='flex: 1;margin-left:5px;'><p>Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited. For example, a successful exploit may only be possible during the installation of an application by a system administrator.</p></div></div><h4 class='bg-light border border-gray-300 rounded p-2'>Base: Scope Metrics</h4><p>The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope.</p><div class='tw-h5' style='padding-left:10px'>Scope</div><p style='padding-left:10px'>Formally, a security authority is a mechanism (e.g., an application, an operating system, firmware, a sandbox environment) that defines and enforces access control in terms of how certain subjects/actors (e.g., human users, processes) can access certain restricted objects/resources (e.g., files, CPU, memory) in a controlled manner. All the subjects and objects under the jurisdiction of a single security authority are considered to be under one security scope. If a vulnerability in a vulnerable component can affect a component which is in a different security scope than the vulnerable component, a Scope change occurs. Intuitively, whenever the impact of a vulnerability breaches a security/trust boundary and impacts components outside the security scope in which vulnerable component resides, a Scope change occurs.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>Changed</p></div><div style='flex: 1;margin-left:5px;'><p>An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.</p></div></div><h4 class='bg-light border border-gray-300 rounded p-2'>Base: Impact Metrics</h4><p>The Impact metrics capture the effects of a successfully exploited vulnerability on the component that suffers the worst outcome that is most directly and predictably associated with the attack. Analysts should constrain impacts to a reasonable, final outcome which they are confident an attacker is able to achieve.</p><div class='tw-h5' style='padding-left:10px'>Confidentiality Impact</div><p style='padding-left:10px'>This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>Low</p></div><div style='flex: 1;margin-left:5px;'><p>There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.</p></div></div><div class='tw-h5' style='padding-left:10px'>Integrity Impact</div><p style='padding-left:10px'>This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>Low</p></div><div style='flex: 1;margin-left:5px;'><p>Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.</p></div></div><div class='tw-h5' style='padding-left:10px'>Availability Impact</div><p style='padding-left:10px'>This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.</p><div style='display:flex;padding-left:10px;'><div style='width:70px;'><p class='text-center bg-gray-800 text-gray-100 rounded'>None</p></div><div style='flex: 1;margin-left:5px;'><p>There is no impact to availability within the impacted component.</p></div></div><h4 class='bg-light border border-gray-300 rounded p-2'>Temporal Metrics</h4><p>The Temporal metrics measure the current state of exploit techniques or code availability, the existence of any patches or workarounds, or the confidence in the description of a vulnerability.</p><h4 class='bg-light border border-gray-300 rounded p-2'>Environmental Metrics</h4><p>These metrics enable the analyst to customize the CVSS score depending on the importance of the affected IT asset to a user’s organization, measured in terms of Confidentiality, Integrity, and Availability.</p>                        </div>
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                        <td>nvd@nist.gov</td>
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<h2>EPSS</h2>
            <div class="mb-4">EPSS는 취약점이 악용될 가능성을 예측하는 점수 모델입니다.</div>

<h3>EPSS 점수</h3>
            <div>EPSS 모델은 0과 1(0~100%) 사이의 확률 점수를 생성합니다. 점수가 높을수록 취약점이 악용될 가능성이 높습니다.</div>
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<h3>EPSS 백분위수</h3>
            <div>백분위수는 EPSS 점수에 따라 CVE의 순위를 매기는 데 사용됩니다. 예를 들어 EPSS 점수 기준 95번째 백분위수의 CVE는 다른 CVE의 95%보다 악용될 가능성이 높습니다.</div>
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                <a href="https://www.first.org/epss/" target="_parent">EPSS First.org<i class="ki-duotone ki-exit-right-corner" style="font-size: 10px;vertical-align:8px"><span class="path1"></span><span class="path2"></span></i></a>
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<h2 class="tw-h3">언급된 제품</h2>
<h3 class='tw-h4'>구성 0</h3><p>Ckeditor>>Ckeditor >> Version 부터 (포함) 4.0 까지 (미포함) 4.21.0</p><h3 class='tw-h4'>구성 0</h3><p>Fedoraproject>>Fedora >> Version 37</p><p>Fedoraproject>>Fedora >> Version 38</p><p>Fedoraproject>>Fedora >> Version 39</p>            <div class="separator my-10"></div>

<h2 class='tw-h3'>참고 자료</h2><div style='margin-bottom: 10px;'><a href='https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-vh5c-xwqv-cv9g' target='_blank'>https://github.com/ckeditor/ckeditor4/security/advisories/GHSA-vh5c-xwqv-cv9g <i class="ki-duotone ki-exit-right-corner" style="font-size: 10px;vertical-align:8px"><span class="path1"></span><span class="path2"></span></i></a><br><span style='margin-left:20px;'>Tags : x_refsource_CONFIRM</span></div><div style='margin-bottom: 10px;'><a href='https://ckeditor.com/cke4/addon/embed' target='_blank'>https://ckeditor.com/cke4/addon/embed <i class="ki-duotone ki-exit-right-corner" style="font-size: 10px;vertical-align:8px"><span class="path1"></span><span class="path2"></span></i></a><br><span style='margin-left:20px;'>Tags : x_refsource_MISC</span></div><div style='margin-bottom: 10px;'><a href='https://ckeditor.com/cke4/addon/iframe' target='_blank'>https://ckeditor.com/cke4/addon/iframe <i class="ki-duotone ki-exit-right-corner" style="font-size: 10px;vertical-align:8px"><span class="path1"></span><span class="path2"></span></i></a><br><span style='margin-left:20px;'>Tags : x_refsource_MISC</span></div><div style='margin-bottom: 10px;'><a href='https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GWKG2VCPJNETVCDTXU4X6FQ2PO6XCNGN/' target='_blank'>https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GWKG2VCPJNETVCDTXU4X6FQ2PO6XCNGN/ <i class="ki-duotone ki-exit-right-corner" style="font-size: 10px;vertical-align:8px"><span class="path1"></span><span class="path2"></span></i></a><br><span style='margin-left:20px;'>Tags : Mailing List, Third Party Advisory</span></div><div style='margin-bottom: 10px;'><a href='https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VCYKD3JZWWA3ESOZG4PHJJEXT4EYIUIQ/' target='_blank'>https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VCYKD3JZWWA3ESOZG4PHJJEXT4EYIUIQ/ <i class="ki-duotone ki-exit-right-corner" style="font-size: 10px;vertical-align:8px"><span class="path1"></span><span class="path2"></span></i></a><br><span style='margin-left:20px;'>Tags : Mailing List</span></div><div style='margin-bottom: 10px;'><a href='https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L4ODGOW6PYVOXHQSMWJBOCE6DXWAI33W/' target='_blank'>https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L4ODGOW6PYVOXHQSMWJBOCE6DXWAI33W/ <i class="ki-duotone ki-exit-right-corner" style="font-size: 10px;vertical-align:8px"><span class="path1"></span><span class="path2"></span></i></a><br><span style='margin-left:20px;'>Tags : Mailing List, Third Party Advisory</span></div><div class="separator my-10"></div>                            </div>
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CVE-2023-28439 : 상세 정보

CVE-2023-28439

CVE 설명

ckeditor4 plugins vulnerable to cross-site scripting caused by the editor instance destroying process