high
7.6
CWE
362
Advisory Published
CVE Published
Updated

CVE-2003-1562: Race Condition

First published: Wed Dec 31 2003(Updated: )

sshd in OpenSSH 3.6.1p2 and earlier, when PermitRootLogin is disabled and using PAM keyboard-interactive authentication, does not insert a delay after a root login attempt with the correct password, which makes it easier for remote attackers to use timing differences to determine if the password step of a multi-step authentication is successful, a different vulnerability than CVE-2003-0190.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
OpenSSH=2
OpenSSH=3.2.2
OpenSSH=3.1
OpenSSH=3.0.2p1
OpenSSH=1.5.8
OpenSSH=2.1.1
OpenSSH=3.2.3p1
OpenSSH=3.1p1
OpenSSH=2.5.1
OpenSSH=2.9.9p2
OpenSSH=3.6.1p2
OpenSSH=3.0
OpenSSH=1.2.1
OpenSSH=2.2
OpenSSH=2.1
OpenSSH=3.0.2
OpenSSH=3.2.2p1
OpenSSH=3.3
OpenSSH=2.3.1
OpenSSH=3.2
OpenSSH=1.2.3
OpenSSH=3.4p1
OpenSSH=3.5p1
OpenSSH=1.2
OpenSSH=1.5.7
OpenSSH=3.0.1p1
OpenSSH=3.6
OpenSSH=2.5.2
OpenSSH=2.9.9
OpenSSH=3.0.1
OpenSSH=3.6.1
OpenSSH=2.3
OpenSSH=2.5
OpenSSH=3.0p1
OpenSSH=1.2.27
OpenSSH=2.9p1
OpenSSH=3.4
OpenSSH=3.5
OpenSSH=1.2.2
OpenSSH=2.9
OpenSSH=3.3p1
OpenSSH=3.6.1p1
OpenSSH=1.3
OpenSSH=1.5
OpenSSH=2.9p2

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2003-1562?

    CVE-2003-1562 is considered a medium severity vulnerability due to its potential to enable password guessing attacks.

  • How do I fix CVE-2003-1562?

    To fix CVE-2003-1562, upgrade OpenSSH to a version later than 3.6.1p2 that addresses this timing issue.

  • What types of authentication are affected by CVE-2003-1562?

    CVE-2003-1562 affects systems using PAM keyboard-interactive authentication when PermitRootLogin is disabled.

  • Can CVE-2003-1562 lead to unauthorized access?

    Yes, CVE-2003-1562 can lead to unauthorized access if attackers successfully exploit timing differences to guess passwords.

  • Which versions of OpenSSH are affected by CVE-2003-1562?

    CVE-2003-1562 affects OpenSSH versions 3.6.1p2 and earlier.

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