CVE-2010-4052

Description

From CVE.org

Stack consumption vulnerability in the regcomp implementation in the GNU C Library (aka glibc or libc6) through 2.11.3, and 2.12.x through 2.12.2, allows context-dependent attackers to cause a denial of service (resource exhaustion) via a regular expression containing adjacent repetition operators, as demonstrated by a {10,}{10,}{10,}{10,} sequence in the proftpd.gnu.c exploit for ProFTPD.

Statement

Red Hat does not consider crash of client application, using regcomp() or regexec() routines on untrusted input without preliminary checking the input for the sanity, to be a security issue (the described deficiency implies and is a known limitation of the glibc regular expression engine implementation). The expressions can be modified to avoid quantification nesting, or program modified to limit size of input passed to regular expression engine. We do not currently plan to fix these flaws. If more information becomes available at a future date, we may revisit these issues.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v2 Score Breakdown

Red HatNVDcve.org
Base Score2.15N/A
Attack VectorLocalNetworkN/A
Access ComplexityLowLowN/A
AuthenticationNoneNoneN/A
Confidentiality ImpactNoneNoneN/A
Integrity ImpactNoneNoneN/A
Availability ImpactPartialPartialN/A

Vector

Red Hat: AV:L/AC:L/Au:N/C:N/I:N/A:P

NVD: AV:N/AC:L/Au:N/C:N/I:N/A:P

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