SB2019083039 - Use-after-free in php7 (Alpine package)

Description

This security bulletin contains information about 1 security vulnerability.

1) Use-after-free (CVE-ID: CVE-2019-13224)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error within the onig_new_deluxe() function in regext.c in Oniguruma library when processing regular expressions. A remote attacker can pass specially crafted input to the application using the vulnerable library version, trigger use-after-free error and perform denial of service attack or execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Remediation

Install update from vendor's website.

References

• https://git.alpinelinux.org/aports/commit/?id=653805b88f263b8936ba3560db05ece894f979f2
• https://git.alpinelinux.org/aports/commit/?id=0fde9a2a066a50fde1b071b37b711c7465bfc7b6
• https://git.alpinelinux.org/aports/commit/?id=408fbb8c83ffd678567264770d861e327f502ace