SB2011122401 - Input validation error in lighttpd
Published: December 24, 2011 Updated: August 4, 2020
Security Bulletin ID
SB2011122401
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Input validation error (CVE-ID: CVE-2011-4362)
The vulnerability allows a remote non-authenticated attacker to perform service disruption.
Integer signedness error in the base64_decode function in the HTTP authentication functionality (http_auth.c) in lighttpd 1.4 before 1.4.30 and 1.5 before SVN revision 2806 allows remote attackers to cause a denial of service (segmentation fault) via crafted base64 input that triggers an out-of-bounds read with a negative index.
Remediation
Install update from vendor's website.
References
- http://archives.neohapsis.com/archives/bugtraq/2011-12/0167.html
- http://blog.pi3.com.pl/?p=277
- http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2011_01.txt
- http://redmine.lighttpd.net/issues/2370
- http://secunia.com/advisories/47260
- http://www.debian.org/security/2011/dsa-2368
- http://www.exploit-db.com/exploits/18295
- http://www.openwall.com/lists/oss-security/2011/11/29/13
- http://www.openwall.com/lists/oss-security/2011/11/29/8
- http://www.securitytracker.com/id?1026359
- https://bugzilla.redhat.com/show_bug.cgi?id=758624
- https://exchange.xforce.ibmcloud.com/vulnerabilities/71536