OS Command Injection in Patch - CVE-2019-13638

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Main Vulnerability Database Vulnerabilities #VU19504

OS Command Injection in Patch - CVE-2019-13638

Published: July 28, 2019


Vulnerability identifier: #VU19504
CSH Severity: Low
CVSS v4: 7.5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2019-13638
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to insufficient validation of ed style diff payload with shell metacharacters in patch files. A remote attacker can trick the victim to use a specially crafted patch file and execute arbitrary OS commands.


Affected software

Patch
Gentoo Linux
Amazon Linux AMI
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Fedora
patch (Alpine package)
patch (Debian package)
patch (Red Hat package)
patch

How to mitigate CVE-2019-13638

Install updates from vendor's website.

patch (Alpine package) - update to 2.7.6-r0
patch (Debian package) - update to 2.7.5-1+deb9u2
patch (Red Hat package) - update to 2.7.1-11.el7_6
patch - update to 2.7.6-11.fc30

External References

Related Security Bulletins