CVE-2008-4302 : Detalle

CVE-2008-4302

5.5
/
Medio
0.16%V4
Local
2008-09-29
17h00 +00:00
2024-08-07
10h08 +00:00
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Descripciones CVE

fs/splice.c in the splice subsystem in the Linux kernel before 2.6.22.2 does not properly handle a failure of the add_to_page_cache_lru function, and subsequently attempts to unlock a page that was not locked, which allows local users to cause a denial of service (kernel BUG and system crash), as demonstrated by the fio I/O tool.

Informaciones CVE

Debilidades relacionadas

CWE-ID Nombre de la debilidad Source
CWE-667 Improper Locking
The product does not properly acquire or release a lock on a resource, leading to unexpected resource state changes and behaviors.

Métricas

Métricas Puntuación Gravedad CVSS Vector Source
V3.1 5.5 MEDIUM CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Base: Exploitabilty Metrics

The Exploitability metrics reflect the characteristics of the thing that is vulnerable, which we refer to formally as the vulnerable component.

Attack Vector

This metric reflects the context by which vulnerability exploitation is possible.

Local

The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities.

Attack Complexity

This metric describes the conditions beyond the attacker’s control that must exist in order to exploit the vulnerability.

Low

Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success when attacking the vulnerable component.

Privileges Required

This metric describes the level of privileges an attacker must possess before successfully exploiting the vulnerability.

Low

The attacker requires privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges has the ability to access only non-sensitive resources.

User Interaction

This metric captures the requirement for a human user, other than the attacker, to participate in the successful compromise of the vulnerable component.

None

The vulnerable system can be exploited without interaction from any user.

Base: Scope Metrics

The Scope metric captures whether a vulnerability in one vulnerable component impacts resources in components beyond its security scope.

Scope

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.

Unchanged

An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.

Base: Impact Metrics

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.

Confidentiality Impact

This metric measures the impact to the confidentiality of the information resources managed by a software component due to a successfully exploited vulnerability.

None

There is no loss of confidentiality within the impacted component.

Integrity Impact

This metric measures the impact to integrity of a successfully exploited vulnerability. Integrity refers to the trustworthiness and veracity of information.

None

There is no loss of integrity within the impacted component.

Availability Impact

This metric measures the impact to the availability of the impacted component resulting from a successfully exploited vulnerability.

High

There is a total loss of availability, resulting in the attacker being able to fully deny access to resources in the impacted component; this loss is either sustained (while the attacker continues to deliver the attack) or persistent (the condition persists even after the attack has completed). Alternatively, the attacker has the ability to deny some availability, but the loss of availability presents a direct, serious consequence to the impacted component (e.g., the attacker cannot disrupt existing connections, but can prevent new connections; the attacker can repeatedly exploit a vulnerability that, in each instance of a successful attack, leaks a only small amount of memory, but after repeated exploitation causes a service to become completely unavailable).

Temporal Metrics

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.

Environmental Metrics

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.

nvd@nist.gov
V2 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C nvd@nist.gov

EPSS

EPSS es un modelo de puntuación que predice la probabilidad de que una vulnerabilidad sea explotada.

Puntuación EPSS

El modelo EPSS produce una puntuación de probabilidad entre 0 y 1 (0 y 100%). Cuanto mayor sea la puntuación, mayor será la probabilidad de que se explote una vulnerabilidad.

Percentil EPSS

El percentil se usa para clasificar las CVE según su puntuación EPSS. Por ejemplo, una CVE en el percentil 95 según su puntuación EPSS tiene más probabilidades de ser explotada que el 95% de otras CVE. Así, el percentil sirve para comparar la puntuación EPSS de una CVE con la de otras CVE.

Información del exploit

Exploit Database EDB-ID : 32384

Fecha de publicación : 2007-07-19 22h00 +00:00
Autor : Jens Axboe
Verificado por EDB : Yes

Products Mentioned

Configuraton 0

Linux>>Linux_kernel >> Version To (excluding) 2.6.22.2

Configuraton 0

Debian>>Debian_linux >> Version 4.0

Redhat>>Enterprise_linux >> Version 5.0

Referencias

http://www.openwall.com/lists/oss-security/2008/09/16/10
Tags : mailing-list, x_refsource_MLIST
http://secunia.com/advisories/32485
Tags : third-party-advisory, x_refsource_SECUNIA
http://secunia.com/advisories/32237
Tags : third-party-advisory, x_refsource_SECUNIA
http://www.redhat.com/support/errata/RHSA-2008-0957.html
Tags : vendor-advisory, x_refsource_REDHAT
http://www.debian.org/security/2008/dsa-1653
Tags : vendor-advisory, x_refsource_DEBIAN
http://secunia.com/advisories/32759
Tags : third-party-advisory, x_refsource_SECUNIA
http://lkml.org/lkml/2007/7/20/168
Tags : mailing-list, x_refsource_MLIST
http://www.securityfocus.com/bid/31201
Tags : vdb-entry, x_refsource_BID