WWWOFFLE negative "Content-Length" value buffer overflow
| wwwoffle-neg-length-bo (9619) |  Low Risk |
Description:
WWWOFFLE (World Wide Web Offline Explorer) is vulnerable to a buffer overflow in the handling of negative "Content-Length" values. By sending an HTTP request with a negative value in the "Content-Length" header field, a remote attacker could overflow a buffer causing a segfault in the child process. It may be possible for an attacker to exploit this vulnerability to execute arbitrary code on the system.
Platforms Affected:
- Andrew M. Bishop, WWWOFFLE 2.7b and prior
- Debian, Debian Linux 2.2
- Debian, Debian Linux 3.0
- SCO, Caldera OpenLinux Workstation 3.1
- SCO, Caldera OpenLinux Workstation 3.1.1
- SuSE, SuSE Linux 7.1
- SuSE, SuSE Linux 7.2
- SuSE, SuSE Linux 7.3
- SuSE, SuSE Linux 8.0
Remedy:
Upgrade to the latest version of WWWOFFLE (2.7c or later), available from the WWWOFFLE Web page. See References.
For SuSE Linux:
Upgrade to the latest WWWOFFLE package, as listed in SuSE Security Announcement SuSE-SA:2002:029. See References.
For Caldera OpenLinux Workstation 3.1 and 3.1.1:
Upgrade to the latest wwwoffle package (2.6b-3MR or later), as listed in SCO Security Advisory CSSA-2002-048.0. See References.
For Debian GNU/Linux:
Upgrade to the latest wwwoffle package as listed below. Refer to DSA-144-1 for more information. See References.
Debian GNU/Linux 2.2 (potato): 2.5c-10.4 or later
Debian GNU/Linux 3.0 (woody): 2.7a-1.2 or later
For other distributions:
Contact your vendor for upgrade or patch information.
Consequences:
Denial of Service
References:
- QITEST1 SECURITY ADVISORY #005, wwwoffle-2.7b and prior segfaults with negative Content-Length value at http://attrition.org/security/advisory/misc/qitest1-005.wwwoffle-27b.
- SCO Security Advisory CSSA-2002-048.0, Linux: wwwoffled remote access vulnerability at ftp://ftp.sco.com/pub/security/OpenLinux/CSSA-2002-048.0.txt.
- WWWOFFLE Web site, World Wide Web Offline Explorer at http://www.gedanken.demon.co.uk/wwwoffle/.
- BID-5260: Andrew Bishop WWWOFFLE Negative Content-Length Buffer Overflow Vulnerability
- CVE-2002-0818: wwwoffled in World Wide Web Offline Explorer (WWWOFFLE) allows remote attackers to cause a denial of service and possibly execute arbitrary code via a negative Content-Length value.
- DSA-144: wwwoffle -- improper input handling
Reported:
Jul 18, 2002
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