CVE-2011-2896

Public on

Last Modified: UTC

Description

The CVE Program describes this issue as:

The LZW decompressor in the LWZReadByte function in giftoppm.c in the David Koblas GIF decoder in PBMPLUS, as used in the gif_read_lzw function in filter/image-gif.c in CUPS before 1.4.7, the LZWReadByte function in plug-ins/common/file-gif-load.c in GIMP 2.6.11 and earlier, the LZWReadByte function in img/gifread.c in XPCE in SWI-Prolog 5.10.4 and earlier, and other products, does not properly handle code words that are absent from the decompression table when encountered, which allows remote attackers to trigger an infinite loop or a heap-based buffer overflow, and possibly execute arbitrary code, via a crafted compressed stream, a related issue to CVE-2006-1168 and CVE-2011-2895.

Statement

Vulnerable. This issue affects the versions of cups as shipped with Red Hat Enterprise Linux 4, 5, and 6. The Red Hat Security Response Team has rated this issue as having moderate security impact for the cups package. A future update may address this issue in the cups package for Red Hat Enterprise Linux 4, 5, and 6. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

Vulnerable. This issue affects the versions of cups as shipped with Red Hat Enterprise Linux 4, 5, and 6. The Red Hat Security Response Team has rated this issue as having moderate security impact for the cups package. A future update may address this issue in the cups package for Red Hat Enterprise Linux 4, 5, and 6. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.

Additional information

  • Bugzilla 727800: David Koblas' GIF decoder LZW decoder buffer overflow
  • FAQ: Frequently asked questions about CVE-2011-2896

Common Vulnerability Scoring System (CVSS) Score Details

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).

CVSS v2 Score Breakdown
Red HatNVD

CVSS v2 Base Score

5.1

5.1

Attack Vector

Network

Network

Access Complexity

High

High

Authentication

None

None

Confidentiality Impact

Partial

Partial

Integrity Impact

Partial

Partial

Availability Impact

Partial

Partial

CVSS v2 Vector

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

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

Frequently Asked Questions

Why is Red Hat's CVSS v3 score or Impact different from other vendors?

My product is listed as "Under investigation" or "Affected", when will Red Hat release a fix for this vulnerability?

What can I do if my product is listed as "Will not fix"?

What can I do if my product is listed as "Fix deferred"?

What is a mitigation?

I have a Red Hat product but it is not in the above list, is it affected?

Why is my security scanner reporting my product as vulnerable to this vulnerability even though my product version is fixed or not affected?

Want to get errata notifications? Sign up here.