Remote code execution in Mercurial - CVE-2017-9462
Published: June 28, 2017 / Updated: September 14, 2018
Vulnerability identifier: #VU7220
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-9462
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote authenticated attacker to execute arbitrary code on the target system.
The weakness exists due to improper input validation in "hg serve --stdio". A remote attacker can use --debugger as a repository name and consequently execute arbitrary code with privileges of the current user.
Successful exploitation of the vulnerability may result in system compromise.
The weakness exists due to improper input validation in "hg serve --stdio". A remote attacker can use --debugger as a repository name and consequently execute arbitrary code with privileges of the current user.
Successful exploitation of the vulnerability may result in system compromise.
Affected software
Mercurial
Amazon Linux AMI
Gentoo Linux
Red Hat Enterprise Linux for x86_64
Fedora
mercurial
Amazon Linux AMI
Gentoo Linux
Red Hat Enterprise Linux for x86_64
Fedora
mercurial
How to mitigate CVE-2017-9462
Update to version 4.1.3 or later.
mercurial - addressed in versions 3.7.3-2.fc24, 3.8.1-3.fc25