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CVE-2017-17458: Mercurial vulnerable to arbitrary code injection

May 13, 2022 (updated September 25, 2024)

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

  • bz.mercurial-scm.org/show_bug.cgi?id=5730
  • confluence.atlassian.com/sourcetreekb/sourcetree-security-advisory-2018-01-24-942834324.html
  • github.com/advisories/GHSA-6v56-cpg6-3rpx
  • github.com/dscho/hg
  • github.com/pypa/advisory-database/tree/main/vulns/mercurial/PYSEC-2017-90.yaml
  • lists.debian.org/debian-lts-announce/2017/12/msg00027.html
  • lists.debian.org/debian-lts-announce/2018/07/msg00005.html
  • lists.debian.org/debian-lts-announce/2018/07/msg00041.html
  • lists.debian.org/debian-lts-announce/2020/07/msg00032.html
  • nvd.nist.gov/vuln/detail/CVE-2017-17458
  • web.archive.org/web/20200227132808/http://www.securityfocus.com/bid/102926
  • www.mercurial-scm.org/pipermail/mercurial-devel/2017-November/107333.html
  • www.mercurial-scm.org/wiki/WhatsNew

Code Behaviors & Features

Detect and mitigate CVE-2017-17458 with GitLab Dependency Scanning

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Affected versions

All versions before 4.4.1

Fixed versions

  • 4.4.1

Solution

Upgrade to version 4.4.1 or above.

Impact 9.8 CRITICAL

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

Learn more about CVSS

Weakness

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

Source file

pypi/mercurial/CVE-2017-17458.yml

Spotted a mistake? Edit the file on GitLab.

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