Vulnerability Monitor

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CVE-2010-1866

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.

Published

2010-05-07T23:00:01.860

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv3.1: 9.8 (CRITICAL)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-190

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	php	php	≤ 5.3.2	Yes
Operating System	opensuse	opensuse	11.1	Yes
Operating System	opensuse	opensuse	11.2	Yes
Operating System	opensuse	opensuse	11.3	Yes
Operating System	suse	linux_enterprise	10.0	Yes
Operating System	suse	linux_enterprise	11.0	Yes
Operating System	suse	linux_enterprise	11.0	Yes

References

http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.html Mailing List ([email protected])
http://php-security.org/2010/05/02/mops-2010-003-php-dechunk-filter-signed-comparison-vulnerability/index.html Broken Link, Exploit ([email protected])
http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00006.html Mailing List (af854a3a-2127-422b-91ae-364da2661108)
http://php-security.org/2010/05/02/mops-2010-003-php-dechunk-filter-signed-comparison-vulnerability/index.html Broken Link, Exploit (af854a3a-2127-422b-91ae-364da2661108)