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AUSCERT External Security Bulletin Redistribution
ESB-2021.3277
USN-5102-1: Mercurial vulnerabilities
5 October 2021
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AusCERT Security Bulletin Summary
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Product: Mercurial
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Create Arbitrary Files -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-3902 CVE-2018-17983
Reference: ESB-2020.3673
ESB-2019.1424
ESB-2018.3292
Original Bulletin:
https://ubuntu.com/security/notices/USN-5102-1
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USN-5102-1: Mercurial vulnerabilities
04 October 2021
Several security issues were fixed in Mercurial.
Releases
o Ubuntu 18.04 LTS
Packages
o mercurial - easy-to-use, scalable distributed version control system
Details
It was discovered that Mercurial mishandled symlinks in subrepositories. An
attacker could use this issue to write arbitrary files to the
target's filesystem. ( CVE-2019-3902 )
It was discovered that Mercurial incorrectly handled certain manifest files.
An attacker could use this issue to cause a denial of service and possibly
execute arbitrary code. ( CVE-2018-17983 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04
o mercurial - 4.5.3-1ubuntu2.2
o mercurial-common - 4.5.3-1ubuntu2.2
In general, a standard system update will make all the necessary changes.
References
o CVE-2019-3902
o CVE-2018-17983
Related notices
o USN-4086-1 : mercurial-common, mercurial
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