CVE-2017-17458 Information

Description

In Mercurial before 4.4.1 it is possible that a specially malformed repository can cause Git subrepositories to run arbitrary code in the form of a .git/hooks/post-update script checked into the repository. Typical use of Mercurial prevents construction of such repositories but they can be created programmatically.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

http://www.securityfocus.com/bid/102926 https://bz.mercurial-scm.org/show_bug.cgi?id=5730 https://confluence.atlassian.com/sourcetreekb/sourcetree-security-advisory-2018-01-24-942834324.html https://lists.debian.org/debian-lts-announce/2017/12/msg00027.html https://lists.debian.org/debian-lts-announce/2018/07/msg00005.html https://lists.debian.org/debian-lts-announce/2018/07/msg00041.html https://lists.debian.org/debian-lts-announce/2020/07/msg00032.html https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-November/107333.html https://www.mercurial-scm.org/wiki/WhatsNewMercurial_4.4.1_.282017-11-07.29

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8