sapi/fpm/fpm/fpm_log.c in PHP before 5.5.31, 5.6.x before 5.6.17, and 7.x before 7.0.2 misinterprets the semantics of the snprintf return value, which allows attackers to obtain sensitive information from process memory or cause a denial of service (out-of-bounds read and buffer overflow) via a long string, as demonstrated by a long URI in a configuration with custom REQUEST_URI logging.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| https://bugs.php.net/bug.php?id=70755 | exploit |
| http://rhn.redhat.com/errata/RHSA-2016-2750.html | vendor advisory |
| http://php.net/ChangeLog-5.php | patch release notes |
| http://www.openwall.com/lists/oss-security/2016/05/29/1 | mailing list release notes |
| http://php.net/ChangeLog-7.php | patch release notes |
| https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05240731 | |
| http://github.com/php/php-src/commit/2721a0148649e07ed74468f097a28899741eb58f?w=1 | |
| http://www.search-lab.hu/about-us/news/111-some-unusual-vulnerabilities-in-the-php-engine | third party advisory patch |