CVE-2017-17458

high-risk

Published 2017-12-07

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.

Do I need to act?

17.2% chance of exploitation in next 30 days

EPSS score — higher than 83% of all CVEs

Not on CISA KEV list

No confirmed active exploitation reported to CISA

Patch status unknown

Check vendor advisories for fix availability and mitigation guidance

CVSS 9.8/10 Critical

NETWORK / LOW complexity

Affected Products (3)

Mercurial

Debian Linux

Affected Vendors

Mercurial Debian

References (18)

Third Party Advisory http://www.securityfocus.com/bid/102926

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

Third Party Advisory https://confluence.atlassian.com/sourcetreekb/sourcetree-security-advisory-2018-...

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

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

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

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

Vendor Advisory https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-November/107333.htm...

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