What’s Vulnerable › Vulnerabilities

CVE-2013-5705

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2014-04-15 · updated 2026-06-16

Description

apache2/modsecurity.c in ModSecurity before 2.7.6 allows remote attackers to bypass rules by using chunked transfer coding with a capitalized Chunked value in the Transfer-Encoding HTTP header.

Affected products

• Debian Linux: 7.0, 8.0
• Trustwave Modsecurity: before 2.7.6 — fixed in 2.7.6

How to fix

Upgrade to a fixed version: Trustwave Modsecurity 2.7.6. Check the vendor advisory for mitigations.

References

• http://martin.swende.se/blog/HTTPChunked.html
• http://www.debian.org/security/2014/dsa-2991
• https://github.com/SpiderLabs/ModSecurity/commit/f8d441cd25172fdfe5b613442fedfc0da3cc333d
• http://martin.swende.se/blog/HTTPChunked.html
• http://www.debian.org/security/2014/dsa-2991
• https://github.com/SpiderLabs/ModSecurity/commit/f8d441cd25172fdfe5b613442fedfc0da3cc333d

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