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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (6.33%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.0
- 9.8 CRITICALCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 6.33% probability · 93th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-78
- Affected
- mercurial/mercurial · debian/debian linux
- Source
- cve@mitre.org
References
- http://www.securityfocus.com/bid/102926Third Party Advisory, VDB Entry
- https://bz.mercurial-scm.org/show_bug.cgi?id=5730Issue Tracking, Third 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 List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00005.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00041.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00032.html
- https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-November/107333.htmlVendor Advisory
- https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.4.1_.282017-11-07.29Vendor Advisory
- http://www.securityfocus.com/bid/102926Third Party Advisory, VDB Entry
- https://bz.mercurial-scm.org/show_bug.cgi?id=5730Issue Tracking, Third 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 List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00005.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2018/07/msg00041.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/07/msg00032.html
- https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-November/107333.htmlVendor Advisory
- https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.4.1_.282017-11-07.29Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.