RCE in Mercurial
CVE-2017-17458
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.
Vulnerability class: Command Injection (OS Command Injection)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.063 (93.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 93.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.063 · newest: 0.063 · change: 0.000
Affected products
- Mercurial
- Debian Linux — versions 7.0, 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- lists.debian.org/debian-lts-announce/2017/12/msg00027.html (mailing-list, Mailing List, Third Party Advisory)
- www.mercurial-scm.org/wiki/WhatsNew (Vendor Advisory)
- lists.debian.org/debian-lts-announce/2018/07/msg00041.html (mailing-list, Mailing List, Third Party Advisory)
- lists.debian.org/debian-lts-announce/2018/07/msg00005.html (mailing-list, Mailing List, Third Party Advisory)
- www.mercurial-scm.org/pipermail/mercurial-devel/2017-November/107333.html (Vendor Advisory)
- www.securityfocus.com/bid/102926 (VDB Entry, Third Party Advisory, vdb-entry)
- bz.mercurial-scm.org/show_bug.cgi (Third Party Advisory, Issue Tracking)
- confluence.atlassian.com/sourcetreekb/sourcetree-security-advisory-2018-01-24-9… (Third Party Advisory)
- lists.debian.org/debian-lts-announce/2020/07/msg00032.html (mailing-list)
Frequently asked questions
- What is CVE-2017-17458?
- CVE-2017-17458 is a critical-severity vulnerability in Mercurial, classified under OS Command Injection. CVSS score: 9.8/10. Published 2017-12-07.
- How severe is CVE-2017-17458?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2017-17458 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.