The dechunk filter in PHP 5.3 through 5.3.2, when decoding an HTTP chunked encoding stream, allows context-dependent attackers to cause a denial of service (crash) and possibly trigger memory corruption via a negative chunk size, which bypasses a signed comparison, related to an integer overflow in the chunk size decoder.

Threat-Mapped Scoring

Score: 1.5

Priority: P4 - Informational (Low)

• S10 – Denial of Service

EPSS

Score: 0.0156
Percentile: 0.80678

CVSS Scoring

Mapped CWE(s)

• CWE-190 : Integer Overflow or Wraparound

All CAPEC(s)

CAPEC(s) with Mapped TTPs

Mapped ATT&CK TTPs

Affected Products

• cpe:2.3:a:php:php:*:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:11.1:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:11.2:*:*:*:*:*:*:*
• cpe:2.3:o:opensuse:opensuse:11.3:*:*:*:*:*:*:*
• cpe:2.3:o:suse:linux_enterprise:10.0:sp3:*:*:*:*:*:*
• cpe:2.3:o:suse:linux_enterprise:11.0:-:*:*:*:*:*:*
• cpe:2.3:o:suse:linux_enterprise:11.0:sp1:*:*:*:*:*:*

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