CVE-2017-17458

critical

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

Advisories
More

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

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

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

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

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

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

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

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

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

Details

Source: Mitre, NVD

Published: 2017-12-07

Updated: 2025-04-20

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

CVSS v4

Base Score: 9.3

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Severity: Critical

EPSS

EPSS: 0.17974