CVE-2011-4362 EXPLOIT
5.0
MEDIUM · CVSS 2.0 · EPSS 21.1% (pctl 98)
Patch early
A public exploit exists.
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.
Scoring
| CVSS | 5.0 (MEDIUM, v2.0) |
|---|---|
| Vector | AV:N/AC:L/Au:N/C:N/I:N/A:P |
| EPSS | 21.11% — more likely to be exploited than 98% of all CVEs |
| On CISA KEV | no |
| Public exploit | yes |
| Published | 2011-12-24 |
| Last modified | 2026-06-16 |
Affected (2)
| Vendor | Product |
|---|---|
| debian | debian linux |
| lighttpd | lighttpd |
Public exploits
| Source | Title | Date |
|---|---|---|
| exploit-db | lighttpd - Denial of Service (PoC) | 2011-12-31 |
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://jvn.jp/en/jp/JVN37417423/index.html
- 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
- 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://jvn.jp/en/jp/JVN37417423/index.html
- http://redmine.lighttpd.net/issues/2370
- http://secunia.com/advisories/47260
- http://www.debian.org/security/2011/dsa-2368
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