Common Vulnerabilities and Exposures

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Upstream information

CVE-2008-5161 at MITRE


Error handling in the SSH protocol in (1) SSH Tectia Client and Server and Connector 4.0 through 4.4.11, 5.0 through 5.2.4, and 5.3 through 5.3.8; Client and Server and ConnectSecure 6.0 through 6.0.4; Server for Linux on IBM System z 6.0.4; Server for IBM z/OS 5.5.1 and earlier, 6.0.0, and 6.0.1; and Client 4.0-J through 4.3.3-J and 4.0-K through 4.3.10-K; and (2) OpenSSH 4.7p1 and possibly other versions, when using a block cipher algorithm in Cipher Block Chaining (CBC) mode, makes it easier for remote attackers to recover certain plaintext data from an arbitrary block of ciphertext in an SSH session via unknown vectors.
CVSS v2 Scores
  National Vulnerability Database
Base Score 2.57
Vector AV:N/AC:H/Au:N/C:P/I:N/A:N
Access Vector Network
Access Complexity High
Authentication None
Confidentiality Impact Partial
Integrity Impact None
Availability Impact None

SUSE information

Note from the SUSE Security Team

Exploiting this problem will surely be noticeable by the administrator and also leak only a very small amount of data. It also requires faking network traffic to the target host too, which is likely impossible for remote attackers. The openSSH team also considers this attack unlikely and unworkable and has published this note regarding it. A configuration setting for our extremely paranoid customers is also listed on above by setting the Ciphers list explicitly so that the problematic cipher is not selected by default.

SUSE Bugzilla entry: 446442 [RESOLVED / UPSTREAM]

No SUSE Security Announcements cross referenced.