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OpenSSH CBC Mode Plaintext Recovery Vulnerability
Secunia Advisory: SA32760
Release Date: 2008-11-17
Last Update: 2008-11-25
Popularity: 4,086 views

Critical:
Less critical
Impact: Exposure of sensitive information
Where: From local network
Solution Status: Unpatched

Software:OpenSSH 4.x
OpenSSH 5.x

Secunia CVSS-2 Score: Available in Secunia business solutions

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Advisory Content (Page 1 of 3)[ 1 ] [ 2 ] [ 3 ]

Description:
A vulnerability has been reported in OpenSSH, which potentially can be exploited by malicious people to disclose sensitive information.

The vulnerability is caused due to the improper handling of errors within an SSH session encrypted with a block cipher algorithm in the CBC (Cipher-Block Chaining) mode. This can be exploited to potentially disclose up to 32 plaintext bits from an arbitrary block of ciphertext.

NOTE: An attack has a low probability of success, an attempt resulting in the termination of the current SSH session.

Successful exploitation requires that an attacker is able to read and alter network data.

This is related to:
SA32740

The vulnerability is reported in version 4.7p1. Other versions may also be affected.

Change Page:
[ 1 ] [ 2 ] [ 3 ]



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