CVE-2019-3902: Path Traversal
First published: Mon Apr 22 2019(Updated: )
A flaw was found in Mercurial before 4.9. It was possible to use symlinks and subrepositories to defeat Mercurial's path-checking logic and write files outside a repository.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Mercurial Mercurial | <4.9 | |
| Debian Debian Linux | =8.0 | |
| Redhat Enterprise Linux | =7.0 | |
| pip/mercurial | <4.9 | 4.9 |
| debian/mercurial | 5.6.1-4 6.3.2-1 6.8.2-1 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3902
- https://lists.debian.org/debian-lts-announce/2019/04/msg00024.html
- https://lists.debian.org/debian-lts-announce/2020/07/msg00032.html
- https://usn.ubuntu.com/4086-1/
- https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_4.9_.282019-02-01.29
- https://nvd.nist.gov/vuln/detail/CVE-2019-3902
- https://usn.ubuntu.com/4086-1
- https://github.com/advisories/GHSA-mq66-vcfc-8246 (Advisory)
- https://launchpad.net/bugs/cve/CVE-2019-3902
- https://www.mercurial-scm.org/repo/hg/rev/6c10eba6b9cd
- https://www.mercurial-scm.org/repo/hg/rev/31286c9282df
- https://www.mercurial-scm.org/repo/hg/rev/83377b4b4ae0
- https://security-tracker.debian.org/tracker/CVE-2019-3902
- https://github.com/pypa/advisory-database/tree/main/vulns/mercurial/PYSEC-2019-188.yaml
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-3902
- https://ubuntu.com/security/CVE-2019-3902
Frequently Asked Questions
What is CVE-2019-3902?
CVE-2019-3902 is a vulnerability found in Mercurial before version 4.9 that allows the use of symlinks and subrepositories to write files outside a repository.
How does CVE-2019-3902 affect Mercurial?
CVE-2019-3902 affects Mercurial before version 4.9 by defeating Mercurial's path-checking logic and enabling the writing of files outside a repository.
What is the severity of CVE-2019-3902?
The severity of CVE-2019-3902 is medium with a severity value of 5.9.
Which software versions are affected by CVE-2019-3902?
Mercurial before version 4.9, Debian Linux 8.0, and Redhat Enterprise Linux 7.0 are affected by CVE-2019-3902.
How can CVE-2019-3902 be fixed?
To fix CVE-2019-3902, users should update Mercurial to version 4.9 or higher.
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