GNU C Library 2.17 posix/regexec.c extend_buffers memory corruption

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4.6$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in GNU C Library 2.17. This affects the function extend_buffers of the file posix/regexec.c. Executing a manipulation can lead to memory corruption. This vulnerability is registered as CVE-2013-0242. Furthermore, an exploit is available. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as problematic was found in GNU C Library 2.17 (Software Library). This vulnerability affects the function extend_buffers of the file posix/regexec.c. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. CVE summarizes:

Buffer overflow in the extend_buffers function in the regular expression matcher (posix/regexec.c) in glibc, possibly 2.17 and earlier, allows context-dependent attackers to cause a denial of service (memory corruption and crash) via crafted multibyte characters.

The weakness was published 01/29/2013 by Paolo Bonzini as msg00967 as confirmed mailinglist post (Website). The advisory is available at sourceware.org. This vulnerability was named CVE-2013-0242 since 12/06/2012. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 71582 (Amazon Linux AMI : glibc (ALAS-2013-270)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350811 (Amazon Linux Security Advisory for glibc: AL2012-2015-020).

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the databases at X-Force (81707), Tenable (71582), SecurityFocus (BID 57638†), OSVDB (89747†) and Secunia (SA51951†). Similar entries are available at VDB-9979 and VDB-65733. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 71582
Nessus Name: Amazon Linux AMI : glibc (ALAS-2013-270)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 881722
OpenVAS Name: CentOS Update for glibc CESA-2013:0769 centos5
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/06/2012 🔍
01/29/2013 +54 days 🔍
01/30/2013 +1 days 🔍
01/30/2013 +0 days 🔍
01/31/2013 +1 days 🔍
01/31/2013 +0 days 🔍
02/07/2013 +7 days 🔍
02/08/2013 +1 days 🔍
04/08/2013 +59 days 🔍
12/23/2013 +259 days 🔍
05/04/2021 +2689 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: msg00967
Researcher: Paolo Bonzini
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2013-0242 (🔍)
GCVE (CVE): GCVE-0-2013-0242
GCVE (VulDB): GCVE-100-7570

OVAL: 🔍
IAVM: 🔍

X-Force: 81707 - glibc extend_buffers() denial of service, Medium Risk
SecurityFocus: 57638 - GNU glibc 'regexec.c' Buffer Overflow Vulnerability
Secunia: 51951 - GNU C Library Denial of Service and Buffer Overflow Two Vulnerabilities, Moderately Critical
OSVDB: 89747
SecurityTracker: 1028063 - Glibc Regex Bug Lets Remote or Local Users Deny Service
Vulnerability Center: 39041 - GNU Glibc 2.17 Remote Denial of Service via Crafted Multibyte Characters, Medium

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 02/07/2013 10:56
Updated: 05/04/2021 14:17
Changes: 02/07/2013 10:56 (85), 08/20/2017 22:19 (11), 05/04/2021 14:17 (3)
Complete: 🔍
Committer: olku
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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