CVE-2014-8242: librsync before 1.0.0 uses a truncated MD4 checksum to match blocks, which makes it easier for remote attacker

Q: How do I fix CVE-2014-8242?

librsync: upgrade to 1.0.0. Exact commands for each OS are on this page.

Q: Is CVE-2014-8242 being exploited?

CVE-2014-8242 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2014-8242 affect?

CVE-2014-8242 affects librsync. Severity is medium (CVSS 5.8). librsync before 1.0.0 uses a truncated MD4 checksum to match blocks, which makes it easier for remote attackers to modify transmitted data via a birthday attack.

Q: How urgent is CVE-2014-8242?

Priority 42/100. No elevated risk signals yet.

This month

MEDIUM 5.8UPGRADE

CVE-2014-8242 is a medium-severity flaw (CVSS 5.8) affecting librsync. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

librsync before 1.0.0 uses a truncated MD4 checksum to match blocks, which makes it easier for remote attackers to modify transmitted data via a birthday attack.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.8 (Medium)
EPSS exploit chance	2.9% (top 13%)
CISA exploited list	No
Weakness	CWE-310
Published	2015-10-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: librsync project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-10-26 17:59 UTCPublished CVE record published
2026-06-17 00:16 UTCUpdated Record last modified

librsync project librsync UPGRADE

Affected: < 1.0.0

Fixed in: 1.0.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 1.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade librsync

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade librsync

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

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-2014-8242?

librsync: upgrade to 1.0.0. Exact commands for each OS are on this page.

Is CVE-2014-8242 being exploited?

CVE-2014-8242 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-2014-8242 affect?

CVE-2014-8242 affects librsync. Severity is medium (CVSS 5.8). librsync before 1.0.0 uses a truncated MD4 checksum to match blocks, which makes it easier for remote attackers to modify transmitted data via a birthday attack.

How urgent is CVE-2014-8242?

Priority 42/100. No elevated risk signals yet.

References

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