Links Web browser large PNG image buffer overflow
| links-png-image-bo (9287) |  High Risk |
Description:
Twibright Labs Links is vulnerable to a buffer overflow caused by improper bounds checking of 16-bit PNG images. By creating a Web page that contains an overly large PNG image, a remote attacker could overflow a buffer and execute arbitrary code on the victim's computer or cause the computer to crash, once the page is viewed.
Note: This vulnerability also affects Mozilla versions prior to 1.0.1.
Consequences:
Gain Access
Remedy:
Upgrade to the latest version of Links (2.0pre6 or later), available from the Twibright Labs Web site. See Refererences.
For Mozilla:
Upgrade to the latest version of Mozilla (1.0.1 or later), available from the Mozilla Web site. See References.
For Mandrake Linux:
Upgrade to the latest Mozilla package as listed below. Refer to MandrakeSoft Security Advisory MDKSA-2002:074 : mozilla for more information. See References.
Mandrake Linux 8.2: 1.0.1-4.1mdk or later
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- Bugzilla Bug 157202: Exploitable (?) heap overrun in PNG.
- LINKS ChangeLog: RELEASE 2.0pre5.
- Mozilla Web site: mozilla.org.
- Twibright Labs Web site: Links - Download.
- BID-4921: Twibright Labs Links Large PNG Image Buffer Overflow Vulnerability
- CVE-2002-2060: Buffer overflow in Links 2.0 pre4 allows remote attackers to crash client browsers and possibly execute arbitrary code via gamma tables in large 16-bit PNG images.
- CVE-2002-2061: Heap-based buffer overflow in Netscape 6.2.3 and Mozilla 1.0 and earlier allows remote attackers to crash client browsers and execute arbitrary code via a PNG image with large width and height values and an 8-bit or 16-bit alpha channel.
Platforms Affected:
- MandrakeSoft Mandrake Linux 8.2
- Mozilla Mozilla 0.8
- Mozilla Mozilla 0.9.2
- Mozilla Mozilla 0.9.2.1
- Mozilla Mozilla 0.9.3
- Mozilla Mozilla 0.9.4
- Mozilla Mozilla 0.9.5
- Mozilla Mozilla 0.9.6
- Mozilla Mozilla 0.9.7
- Mozilla Mozilla 0.9.8
- Mozilla Mozilla 0.9.9
- Mozilla Mozilla 1.0
- Twibright Links 2.0 pre4
Reported:
May 28, 2002
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For corrections or additions please email xforce@iss.net