high
7.8
CWE
20
Advisory Published
Updated

CVE-2014-2855: Input Validation

First published: Wed Apr 23 2014(Updated: )

The check_secret function in authenticate.c in rsync 3.1.0 and earlier allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a user name which does not exist in the secrets file.

Credit: security@ubuntu.com

Affected SoftwareAffected VersionHow to fix
Samba<=3.1.0
Samba=2.6.9
Samba=2.7.0
Samba=2.7.1
Samba=2.7.2
Samba=2.7.3
Samba=2.7.4
Samba=2.7.5
Samba=2.7.6
Samba=2.7.7
Samba=2.7.8
Samba=2.7.9
Samba=2.8.0
Samba=2.8.1
Samba=2.8.2
Samba=2.8.3
Samba=2.8.4
Samba=2.8.5
Samba=2.8.6
Samba=2.8.7
Samba=2.8.8
Samba=2.8.9
Samba=2.9.0
Samba=2.9.1
Samba=2.9.2
Samba=2.9.3
Samba=2.9.4
Samba=2.9.5
Samba=2.9.6
Samba=2.9.7
Samba=2.9.8
Samba=2.9.9
Samba=3.0.0
Samba=3.0.1
Samba=3.0.2
Samba=3.0.3
Samba=3.0.4
Samba=3.0.5
Samba=3.0.6
Samba=3.0.7
Samba=3.0.8
Samba=3.0.9

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2014-2855?

    CVE-2014-2855 is rated as a critical vulnerability due to its potential to cause denial of service through high CPU consumption.

  • How do I fix CVE-2014-2855?

    To fix CVE-2014-2855, upgrade rsync to version 3.1.1 or later, or ensure that proper user management is in place to prevent invalid usernames.

  • What systems are affected by CVE-2014-2855?

    CVE-2014-2855 affects rsync versions 3.1.0 and earlier, as well as specific earlier versions from 2.6.9 to 2.9.9.

  • What type of attack is possible with CVE-2014-2855?

    CVE-2014-2855 allows remote attackers to launch denial-of-service attacks by using non-existent usernames that trigger an infinite loop.

  • Is there a workaround for CVE-2014-2855 if I cannot upgrade?

    A temporary workaround for CVE-2014-2855 is to restrict access to rsync or to manage user authentication rigorously until an upgrade is possible.

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