20470 : libungif/giflib Malformed .gif File NULL Dereference DoS
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Info

Last Modified
about 1 year ago

Percent Complete
100%

Disclosure
Nov 04, 2005

Discovery
Unknown

Dates

Exploit
Unknown

Solution
Unknown

Keywords

 RHSA-2005:828-17,GLSA 200511-03,SUSE-SR:2005:025

Description

 libungif contains a flaw that may allow a remote denial of service. The issue is triggered when a program using libungif opens a specially crafted GIF file. Due to a flaw in the library, this may cause the ColorMaps value incorrectly when freeing a colormap object, and will result in the program crashing with a NULL dereference.

Classification

 Location: Remote/Network Access Required
Attack Type: Denial of Service
Impact: Loss of Availability
Exploit: Exploit Unknown
Disclosure: OSVDB Verified

Technical

 This vulnerability exists in lib/dgif_lib.c, lib/egif_lib.c, and lib/gifalloc.c.

Solution

 Upgrade to version 4.1.4 or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products
libungif
Watch-list
libungif
Watch-list
 4.1.3
giflib
Watch-list
giflib
Watch-list
 4.1.3

References

Tools & Filters

Nessus

 20145 20153 20441 20632 22756

Credit
  • Chris Evans - chrisBrand New Doo Dooscary.beasts.org -

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