ImageMagick ReadBlobString() function buffer overflow

imagemagick-readblogstring-bo (36739) The risk level is classified as HighHigh Risk

Description:

ImageMagick is vulnerable to an off-by-one buffer overflow, caused by improper bounds checking by the ReadBlobString() function in magick/blob.c. By persuading a victim to open a specially-crafted image file, a remote attacker could exploit this vulnerability to overflow a buffer and execute arbitrary code on the system with the privileges of the user.

*CVSS:

Base Score: 7.6
  Access Vector: Network
  Access Complexity: High
  Authentication: None
  Confidentiality Impact: Complete
  Integrity Impact: Complete
  Availability Impact: Complete
 
Temporal Score: 5.6
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Gain Access

Remedy:

Upgrade to the latest version of ImageMagick (6.3.5-9 or later), available from the ImageMagick Web site. See References.

For GraphicsMagick:
Upgrade to the latest version of GraphicsMagick (1.1.11 or later), available from the GraphicsMagick Web site. See References.

For Ubuntu Linux (imagemagick):
Refer to USN-523-1 for patch, upgrade, or suggested workaround information. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

  • GraphicsMagick Web site: GraphicsMagick Image Processing System.
  • iDefense PUBLIC ADVISORY: 09.19.07: Multiple Vendor ImageMagick Off-By-One Vulnerability.
  • ImageMagick Web site: Downloads.
  • BID-25766: ImageMagick Blob.C Off-By-One Buffer Overflow Vulnerability
  • CVE-2007-4987: Off-by-one error in the ReadBlobString function in blob.c in ImageMagick before 6.3.5-9 allows context-dependent attackers to execute arbitrary code via a crafted image file, which triggers the writing of a '\0' character to an out-of-bounds address.
  • DSA-1858: imagemagick -- multiple vulnerabilities
  • GLSA-200710-27: ImageMagick: Multiple vulnerabilities
  • MDVSA-2008:035: Updated ImageMagick packages fix multiple vulnerabilities
  • SA26926: ImageMagick Multiple Vulnerabilities
  • SA29094: GraphicsMagick Multiple Vulnerabilities
  • SECTRACK ID: 1018729: ImageMagick Off-by-one and Integer Overflows Let Remote Users Execute Arbitrary Code
  • SUSE-SR:2007:023: SUSE Security Summary Report
  • USN-523-1: ImageMagick vulnerabilities
  • VUPEN/ADV-2007-3245: ImageMagick Images Processing Multiple Code Execution Vulnerabilities

Platforms Affected:

  • Canonical Ubuntu 6.06 LTS
  • Canonical Ubuntu 6.10
  • Canonical Ubuntu 7.04
  • Debian Debian Linux 4.0
  • Debian Debian Linux 5.0
  • Gentoo Linux
  • GraphicsMagick GraphicsMagick 1.1.10
  • ImageMagick ImageMagick prior to 6.3.5-9
  • MandrakeSoft Mandrake Linux 2007
  • MandrakeSoft Mandrake Linux 2007 X86_64
  • MandrakeSoft Mandrake Linux 2007.1 X86_64
  • MandrakeSoft Mandrake Linux 2007.1
  • MandrakeSoft Mandrake Linux 2008.0
  • MandrakeSoft Mandrake Linux 2008.0 X86_64
  • MandrakeSoft Mandrake Linux Corporate Server 4.0
  • MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64

Reported:

Sep 19, 2007

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