Input validation error in lighttpd - CVE-2011-4362

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Main Vulnerability Database Vulnerabilities #VU33958

Input validation error in lighttpd - CVE-2011-4362

Published: December 24, 2011 / Updated: August 4, 2020


Vulnerability identifier: #VU33958
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2011-4362
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: Public exploit is available

Vulnerability details

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.


Affected software

lighttpd
Amazon Linux AMI
Gentoo Linux
Fedora
lighttpd (Alpine package)
lighttpd
Adobe Commerce (formerly Magento Commerce)

How to mitigate CVE-2011-4362

Install update from vendor's website.

lighttpd - update to 1.4.30
lighttpd (Alpine package) - update to 1.4.30-r0
lighttpd - addressed in versions 1.4.31-1.el5, 1.4.31-1.el6

Links to Public Exploits and PoC-codes

External References

Related Security Bulletins