#VU29241 Symlink attack in Mercurial - CVE-2019-3902
Published: June 25, 2020
Vulnerability identifier: #VU29241
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-3902
CWE-ID: CWE-61
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Mercurial
Mercurial
Software vendor:
Mercurial
Mercurial
Description
The vulnerability allows a remote user to escalate privileges on the system.
The vulnerability exists due to a symlink following issue. A remote user can create a specially crafted symbolic link to and write files outside a repository.
Remediation
Install updates from vendor's website.