CVE-2017-17458

CRITICAL

Mercurial < 4.4.1 - Remote Code Execution via Malformed Git Subrepository

Title source: llm

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.

References (9)

Core 9

Core References

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2017/12/msg00027.html

Vendor Advisory x_refsource_misc

https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.4.1_.282017-11-07.29

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2018/07/msg00041.html

Mailing List, Third Party Advisory mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2018/07/msg00005.html

Vendor Advisory x_refsource_misc

https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-November/107333.html

Third Party Advisory, VDB Entry vdb-entry x_refsource_bid

http://www.securityfocus.com/bid/102926

Issue Tracking, Third Party Advisory x_refsource_misc

https://bz.mercurial-scm.org/show_bug.cgi?id=5730

Third Party Advisory x_refsource_confirm

https://confluence.atlassian.com/sourcetreekb/sourcetree-security-advisory-2018-01-24-942834324.html

Mailing List mailing-list x_refsource_mlist

https://lists.debian.org/debian-lts-announce/2020/07/msg00032.html

Scores

CVSS v3 9.8

EPSS 0.0633

EPSS Percentile 92.8%

Attack Vector NETWORK

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

Details

CWE

CWE-78

Status published

Products (4)

debian/debian_linux 7.0

debian/debian_linux 8.0

mercurial/mercurial < 4.4.1

pypi/mercurial 0 - 4.4.1PyPI

Published Dec 07, 2017

Tracked Since Feb 18, 2026