Link following in Mercurial - CVE-2017-1000115

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Main Vulnerability Database Vulnerabilities #VU31407

Link following in Mercurial - CVE-2017-1000115

Published: October 5, 2017 / Updated: July 18, 2020


Vulnerability identifier: #VU31407
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2017-1000115
CWE-ID: CWE-59
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to manipulate data.

Mercurial prior to version 4.3 is vulnerable to a missing symlink check that can malicious repositories to modify files outside the repository


Affected software

Mercurial
Arch Linux
Amazon Linux AMI
Gentoo Linux
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Server for ARM
Red Hat Enterprise Linux EUS Compute Node
Red Hat Enterprise Linux for Power, big endian - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - Extended Update Support
Slackware Linux
Fedora
mercurial (Alpine package)
mercurial (Red Hat package)
mercurial

How to mitigate CVE-2017-1000115

Install update from vendor's website.

Mercurial - update to 4.3
mercurial (Alpine package) - update to 4.3.1-r0
mercurial (Red Hat package) - update to 2.6.2-8.el7_4
mercurial - addressed in versions 3.8.1-4.fc25, 4.2.3-1.fc26

External References

Related Security Bulletins