PHP up to 5.5.29/5.6.13 PHAR Archive ext/phar/zip.c phar_parse_zipfile off-by-one

Summaryinfo

A vulnerability marked as critical has been reported in PHP up to 5.5.29/5.6.13. Affected by this vulnerability is the function phar_parse_zipfile of the file ext/phar/zip.c of the component PHAR Archive Handler. Performing a manipulation results in off-by-one. This vulnerability is cataloged as CVE-2015-7804. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in PHP up to 5.5.29/5.6.13. It has been classified as critical. This affects the function phar_parse_zipfile of the file ext/phar/zip.c of the component PHAR Archive Handler. The manipulation with an unknown input leads to a off-by-one vulnerability. CWE is classifying the issue as CWE-193. A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value. This is going to have an impact on availability.

It is possible to read the advisory at bugs.php.net. This vulnerability is uniquely identified as CVE-2015-7804. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/12/2025).

Upgrading to version 5.5.30 or 5.6.14 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at git.php.net. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Programming Language Software

Name

• PHP

Version

• 5.5.0
• 5.5.1
• 5.5.2
• 5.5.3
• 5.5.4
• 5.5.5
• 5.5.6
• 5.5.7
• 5.5.8
• 5.5.9
• 5.5.10
• 5.5.11
• 5.5.12
• 5.5.13
• 5.5.14
• 5.5.15
• 5.5.16
• 5.5.17
• 5.5.18
• 5.5.19
• 5.5.20
• 5.5.21
• 5.5.22
• 5.5.23
• 5.5.24
• 5.5.25
• 5.5.26
• 5.5.27
• 5.5.28
• 5.5.29
• 5.6.0
• 5.6.1
• 5.6.2
• 5.6.3
• 5.6.4
• 5.6.5
• 5.6.6
• 5.6.7
• 5.6.8
• 5.6.9
• 5.6.10
• 5.6.11
• 5.6.12
• 5.6.13

License

• open-source

Website

• Product: https://www.php.org/

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