CVE-2011-4362

CVE-2011-4362 is a medium-severity vulnerability in Lighttpd with a CVSS 2.0 base score of 5.0. Its EPSS exploit-prediction score of 16% places it in the 97th percentile, indicating an elevated likelihood of exploitation.

Key facts

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.

Frequently asked questions

What is 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.
How severe is CVE-2011-4362?
CVE-2011-4362 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2011-4362 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 16% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-4362?
CVE-2011-4362 primarily affects Lighttpd. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-4362?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2011-4362 published?
CVE-2011-4362 was published on 2011-12-24 and last updated on 2026-06-16.

References

Affected products (5)

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Threat intelligence

Threat-intel indicators referencing this CVE: