UpHeron
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Servers and applications

CVE-2011-4362

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.

Severity
Medium 5.0
Published
24 Dec 2011
Last changed
16 Jun 2026
Added to UpHeron
1 Nov 2026
Fixed in
1.4.30
Exploit chance
21% in the next 30 daysHigher than 97% of CVEs. EPSS by FIRST, 12 Nov 2026
Attack
Over the network · No login needed
Attacker can
Slow it down
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
Sources
NVD

Affected software

SoftwareAffected versions
lighttpdServers and applications · cpe:a:lighttpd:lighttpd
  • From 1.4.1 before 1.4.30
  • Version 1.5.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2011-4362
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2011-4362