ID CVE-2003-1562
Summary 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.
References
Vulnerable Configurations
  • cpe:2.3:a:openbsd:openssh:1.2:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:1.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:1.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:1.2.2:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:1.2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:1.2.3:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:1.2.3:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:1.2.27:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:1.2.27:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:1.3:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:1.3:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:1.5:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:1.5:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:1.5.7:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:1.5.7:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:1.5.8:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:1.5.8:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2.1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2.2:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2.3:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2.3:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2.5:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2.5:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2.5.2:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2.9:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2.9:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2.9.9:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2.9.9:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2.9.9p2:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2.9.9p2:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2.9p1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2.9p1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:2.9p2:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:2.9p2:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.0:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.0.1p1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.0.1p1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.0.2p1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.0.2p1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.0p1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.0p1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.1p1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.1p1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.2:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.2.2:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.2.2p1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.2.2p1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.2.3p1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.2.3p1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.3:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.3:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.3p1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.3p1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.4:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.4:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.4p1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.4p1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.5:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.5:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.5p1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.5p1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.6:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.6:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.6.1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.6.1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.6.1p1:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.6.1p1:*:*:*:*:*:*:*
  • cpe:2.3:a:openbsd:openssh:3.6.1p2:*:*:*:*:*:*:*
    cpe:2.3:a:openbsd:openssh:3.6.1p2:*:*:*:*:*:*:*
CVSS
Base: 7.6 (as of 05-09-2008 - 04:00)
Impact:
Exploitability:
CWE CWE-362
CAPEC
  • Leveraging Race Conditions
    The adversary targets a race condition occurring when multiple processes access and manipulate the same resource concurrently, and the outcome of the execution depends on the particular order in which the access takes place. The adversary can leverage a race condition by "running the race", modifying the resource and modifying the normal execution flow. For instance, a race condition can occur while accessing a file: the adversary can trick the system by replacing the original file with his version and cause the system to read the malicious file.
  • Leveraging Time-of-Check and Time-of-Use (TOCTOU) Race Conditions
    This attack targets a race condition occurring between the time of check (state) for a resource and the time of use of a resource. A typical example is file access. The adversary can leverage a file access race condition by "running the race", meaning that they would modify the resource between the first time the target program accesses the file and the time the target program uses the file. During that period of time, the adversary could replace or modify the file, causing the application to behave unexpectedly.
Access
VectorComplexityAuthentication
NETWORK HIGH NONE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
cvss-vector via4 AV:N/AC:H/Au:N/C:C/I:C/A:C
refmap via4
bid 7482
bugtraq
  • 20030501 Re: OpenSSH/PAM timing attack allows remote users identification
  • 20030505 Re: OpenSSH/PAM timing attack allows remote users identification
confirm http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=248747
statements via4
contributor Joshua Bressers
lastmodified 2008-08-11
organization Red Hat
statement The risks associated with fixing this bug are greater than the low severity security risk. We therefore currently have no plans to fix this flaw in Red Hat Enterprise Linux 2.1 and 3 which is in maintenance mode.
Last major update 05-09-2008 - 04:00
Published 31-12-2003 - 05:00
Last modified 05-09-2008 - 04:00
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