Public Date:
720612: CVE-2011-2692 libpng: Invalid read when handling empty sCAL chunks

The MITRE CVE dictionary describes this issue as:

The png_handle_sCAL function in pngrutil.c in libpng 1.0.x before 1.0.55, 1.2.x before 1.2.45, 1.4.x before 1.4.8, and 1.5.x before 1.5.4 does not properly handle invalid sCAL chunks, which allows remote attackers to cause a denial of service (memory corruption and application crash) or possibly have unspecified other impact via a crafted PNG image that triggers the reading of uninitialized memory.

Find out more about CVE-2011-2692 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 4.3
Base Metrics AV:N/AC:M/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux version 6 (libpng) RHSA-2011:1105 2011-07-28
Red Hat Enterprise Linux version 5 (libpng) RHSA-2011:1104 2011-07-28
Red Hat Enterprise Linux version 4 RHSA-2011:1103 2011-07-28

Affected Packages State

Platform Package State
Red Hat Enterprise Linux version 4 libpng10 1.0.16-9.el4 Fixed
Red Hat Enterprise Linux version 4 libpng 1.2.7-8.el4 Fixed