ImageMagick ReadBlobString() function buffer overflow

imagemagick-readblogstring-bo (36739)

High 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.

Platforms Affected:

• Canonical, Ubuntu 6.06 LTS
• Canonical, Ubuntu 6.10
• Canonical, Ubuntu 7.04
• 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
• MandrakeSoft, Mandrake Linux 2007.1 X86_64
• 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

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.

Consequences:

Gain Access

References:

• GraphicsMagick Web site, GraphicsMagick Image Processing System at http://www.graphicsmagick.org/.
• iDefense PUBLIC ADVISORY: 09.19.07, Multiple Vendor ImageMagick Off-By-One Vulnerability at http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=595.
• ImageMagick Web site, Downloads at http://www.imagemagick.org/script/download.php.
• 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.
• FrSIRT/ADV-2007-3245: ImageMagick Images Processing Multiple Code Execution 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

Reported:

Sep 19, 2007

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