Home/CVE/In Mercurial before 4.4.1, it is possible that a specially malformed repository can cause Git subrepositories to run arb
CVE

CVE-2017-17458

In Mercurial before 4.4.1, it is possible that a specially malformed repository can cause Git subrepositories to run arb

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.

CRITICAL · CVSS 9.8 EPSS 0.17249
Schedule remediation
  • EPSS ≥ 0.10 - elevated exploitation probability
  • EPSS percentile: top 5% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
▤

Affected Products & Versions

2
mercurial< 4.4.1
debian linuxall versions
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
PyPI mercurial CRITICAL fixed in 4.4.1
▣

Scoring & Timeline

9.8
CRITICAL · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD07 Dec 2017 · 06:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

3
suse-csafopenSUSE-SU-2024:10586-1
suse-csafSUSE-SU-2018:0127-1
suse-csafSUSE-SU-2018:0129-1
🔗

References & Sources

9
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://www.securityfocus.com/bid/102926Third Party AdvisoryVDB Entry
https://bz.mercurial-scm.org/show_bug.cgi?id=5730Issue TrackingThird Party Advisory
https://confluence.atlassian.com/sourcetreekb/sourcetree-security-advisory-2018-01-24-942834324.htmlThird Party Advisory
https://lists.debian.org/debian-lts-announce/2017/12/msg00027.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00005.htmlMailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2018/07/msg00041.htmlMailing ListThird Party Advisory
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