Null httpd negative "Content-Length" heap buffer overflow
|null-httpd-contentlength-bo (10160)||High Risk|
Null httpd is vulnerable to a buffer overflow, caused by improper 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 and cause the Web server to crash or execute arbitrary code on the system.
Upgrade to the latest version of Null httpd (0.5.1 or later), available from the Freshmeat Web site. See References.
- BugTraq Mailing List, Sun Sep 22 2002 - 18:19:48 CDT: remote exploitable heap overflow in Null HTTPd 0.5.0.
- Netric Security Advisory netric-adv009: Null HTTPd 0.5.0 advisory.
- Null httpd Web site: Null httpd 0.5.1 (Development). (This release fixes a remotely triggerable segfault caused by malicious HTTP request headers, fixes XSS filtering in 404 responses, and fixes segfaults on failed DNS lookups.)
- Null httpd Web site: freshmeat.net: Project details for Null httpd.
- BID-5774: Null HTTPd Remote Heap Overflow Vulnerability
- BID-6255: Null HTTPD Remote Heap Corruption Vulnerability
- CVE-2002-1496: Heap-based buffer overflow in Null HTTP Server 0.5.0 and earlier allows remote attackers to execute arbitrary code via a negative value in the Content-Length HTTP header.
- OSVDB ID: 9212: Null httpd Content-Length Header Handling Remote Overflow
- NullLogic Null httpd 0.5.0
Sep 22, 2002
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (IBM Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.
For corrections or additions please email ignore thisxforceignore this@ignore thisus.ignore thisibm.comignore this