Double Free in PHP - CVE-2019-11049
Published: July 22, 2021
Vulnerability identifier: #VU55265
CSH Severity: High
CVSS v4: 9.3 [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]
CVE-ID: CVE-2019-11049
CWE-ID: CWE-415
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error within mail() function implementation. A remote attacker can pass specially crafted header in lowercase, trigger double free error and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
PHP
Debian Linux
Fedora
Tenable.sc
php
php7.3 (Debian package)
Debian Linux
Fedora
Tenable.sc
php
php7.3 (Debian package)
How to mitigate CVE-2019-11049
Install updates from vendor's website.
PHP - update to 7.3.13
Tenable.sc - update to 5.19.0
php - addressed in versions 7.3.13-1.fc30, 7.3.13-1.fc31
php7.3 (Debian package) - update to 7.3.14-1~deb10u1
Tenable.sc - update to 5.19.0
php - addressed in versions 7.3.13-1.fc30, 7.3.13-1.fc31
php7.3 (Debian package) - update to 7.3.14-1~deb10u1
External References
- https://bugs.php.net/bug.php?id=78943
- https://security.netapp.com/advisory/ntap-20200103-0002/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/
- https://seclists.org/bugtraq/2020/Feb/27
- https://www.debian.org/security/2020/dsa-4626