SB2019102312 - Multiple vulnerabilities in pacman

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) OS Command Injection (CVE-ID: CVE-2019-18182)

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation within the the download_with_xfercommand() function in src/pacman/conf.c file in pacman. A remote attacker can trick the victim to enable a non-default XferCommand to retrieve an attacker-controlled crafted database and package and execute arbitrary OS commands on the system with privileges of the current user.

2) OS Command Injection (CVE-ID: CVE-2019-18183)

The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation within the the apply_deltas() function in lib/libalpm/sync.c file in pacman. A remote attacker can trick the victim to enable a non-default delta feature, retrieve an attacker-controlled crafted database and package and execute arbitrary OS commands on the system with privileges of the current user.

Remediation

Install update from vendor's website.

References

• https://security.archlinux.org/advisory/ASA-201910-13
• https://security.archlinux.org/CVE-2019-18182
• https://security.archlinux.org/CVE-2019-18183