CVE-2004-1343: CVS 1.12 and earlier on Debian GNU/Linux does not properly handle when a mapping for the current repository do

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MEDIUM 5.0WATCHLISTDOWNGRADE

CVE-2004-1343 is a medium-severity flaw (CVSS 5.0) affecting cvs. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

CVS 1.12 and earlier on Debian GNU/Linux does not properly handle when a mapping for the current repository does not exist in the cvs-repouids file, which allows remote attackers to cause a denial of service (server crash).

Why this priority

On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.9% (top 20%)
CISA exploited list	No
Published	2004-12-31
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: cvs

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2004-12-31 05:00 UTCPublished CVE record published
2026-06-16 22:07 UTCUpdated Record last modified

cvs cvs DOWNGRADE

Affected: 1.10 · 1.10.6 · 1.10.7 · 1.10.8 · 1.11 · 1.11.1 · 1.11.1_p1 · 1.11.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.10

1. Check installed version

apt-cache policy cvs || rpm -q cvs || cvs --version

2. No fixed release: DOWNGRADE to a release before 1.10 (Debian / Ubuntu)

apt-cache madison cvs sudo apt install cvs=<VERSION_BEFORE_1.10> sudo apt-mark hold cvs

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list cvs sudo dnf downgrade cvs-<VERSION_BEFORE_1.10> sudo dnf versionlock add cvs

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2004-1343?

cvs: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2004-1343 being exploited?

CVE-2004-1343 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2004-1343 affect?

CVE-2004-1343 affects cvs. Severity is medium (CVSS 5.0). CVS 1.12 and earlier on Debian GNU/Linux does not properly handle when a mapping for the current repository does not exist in the cvs-repouids file, which allows remote attackers to cause a denial of service (server crash).

How urgent is CVE-2004-1343?

Priority 43/100. On your watchlist

Software pages

Debian vulnerabilities

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References

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