CVE-2011-4362

Name: CVE-2011-4362
Creator: NVD / NIST
Published: 2011-12-24T19:55:05.24+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 16.25%

Last modified Jun 16, 2026

CVE-2011-4362 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 16.25% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

16.25%

96.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Lighttpd	Lighttpd	>= 1.4.1, < 1.4.30
Lighttpd	Lighttpd	1.5.0
Debian	Debian Linux	5.0
Debian	Debian Linux	6.0
Debian	Debian Linux	7.0

References

http://archives.neohapsis.com/archives/bugtraq/2011-12/0167.htmlBroken Link
http://blog.pi3.com.pl/?p=277Exploit, Third Party Advisory
http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2011_01.txtExploit, Patch, Vendor Advisory
http://jvn.jp/en/jp/JVN37417423/index.htmlThird Party Advisory
http://redmine.lighttpd.net/issues/2370Exploit, Patch, Vendor Advisory
http://secunia.com/advisories/47260Third Party Advisory
http://www.debian.org/security/2011/dsa-2368Third Party Advisory
http://www.exploit-db.com/exploits/18295Exploit, Third Party Advisory, VDB Entry
http://www.openwall.com/lists/oss-security/2011/11/29/13Exploit, Mailing List, Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2011/11/29/8Exploit, Mailing List, Patch, Third Party Advisory
http://www.securitytracker.com/id?1026359Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=758624Issue Tracking, Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/71536Third Party Advisory, VDB Entry
http://archives.neohapsis.com/archives/bugtraq/2011-12/0167.htmlBroken Link
http://blog.pi3.com.pl/?p=277Exploit, Third Party Advisory
http://download.lighttpd.net/lighttpd/security/lighttpd_sa_2011_01.txtExploit, Patch, Vendor Advisory
http://jvn.jp/en/jp/JVN37417423/index.htmlThird Party Advisory
http://redmine.lighttpd.net/issues/2370Exploit, Patch, Vendor Advisory
http://secunia.com/advisories/47260Third Party Advisory
http://www.debian.org/security/2011/dsa-2368Third Party Advisory
http://www.exploit-db.com/exploits/18295Exploit, Third Party Advisory, VDB Entry
http://www.openwall.com/lists/oss-security/2011/11/29/13Exploit, Mailing List, Patch, Third Party Advisory
http://www.openwall.com/lists/oss-security/2011/11/29/8Exploit, Mailing List, Patch, Third Party Advisory
http://www.securitytracker.com/id?1026359Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=758624Issue Tracking, Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/71536Third Party Advisory, VDB Entry

Timeline

Published: Dec 24, 2011
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-4362?

How severe is CVE-2011-4362?

Severity scoring for CVE-2011-4362 is pending analysis. The EPSS model estimates a 16.25% probability of exploitation in the next 30 days.

How do I fix CVE-2011-4362?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-4362?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST