SB20220720126 - Buffer overflow in PHP
Published: July 20, 2022 Updated: June 14, 2025
Security Bulletin ID
SB20220720126
CSH Severity
High
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Buffer overflow (CVE-ID: CVE-2016-7480)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber
The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
The SplObjectStorage unserialize implementation in ext/spl/spl_observer.c in PHP before 7.0.12 does not verify that a key is an object, which allows remote attackers to execute arbitrary code or cause a denial of service (uninitialized memory access) via crafted serialized data.
Remediation
Install update from vendor's website.
References
- https://www.youtube.com/watch?v=LDcaPstAuPk
- https://github.com/php/php-src/commit/61cdd1255d5b9c8453be71aacbbf682796ac77d4
- https://bugs.php.net/bug.php?id=73257
- http://php.net/ChangeLog-7.php
- http://blog.checkpoint.com/wp-content/uploads/2016/12/PHP_Technical_Report.pdf
- http://blog.checkpoint.com/2016/12/27/check-point-discovers-three-zero-day-vulnerabilities-web-programming-language-php-7
- http://www.securityfocus.com/bid/95152
- https://security.netapp.com/advisory/ntap-20180112-0001/