795 : Multiple Vendor SSH CRC-32 detect_attack() Function Overflow
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Views All Time
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Info

Last Modified
8 months ago

Percent Complete
100%

Disclosure
Feb 08, 2001

Discovery
Unknown

Dates

Exploit
Feb 21, 2001

Solution
Unknown

Description

 A remote overflow exists in SSH and OpenSSH and derived products. The implementation of SSH protocol version 1.5 fails to correctly calculate the range within deattack.c's detect_attack function, resulting in an integer overflow. With a specially crafted request, an attacker can cause execution of arbitrary code as UID 0, resulting in a loss of confidentiality, integrity, and/or availability.

Classification

 Location: Remote/Network Access Required
Attack Type: Input Manipulation
Impact: Loss of Integrity
Exploit: Exploit Available
Disclosure: OSVDB Verified

Solution

 Upgrade to the appropriate version from your vendor; you must contact your vendor for the fixed version. It is usually also possible to correct the flaw by disabling support for version 1 of the SSH protocol in your configuration. Again, exact details will vary from vendor to vendor.

Products
Cisco Systems, Inc.
Watch-list
CatOS
Watch-list
 6.2
IOS
Watch-list
 12.0
12.1
12.2
PIX
Watch-list
 5.2
5.3
WebNS
Watch-list
 4.01
4.10
5.0
5.01
F-Secure Corporation
Watch-list
F-Secure SSH
Watch-list
 1.3.10
1.3.5
1.3.6
1.3.7
1.3.8
1.3.9
OSSH
Watch-list
OSSH
Watch-list
 1.5.7
OpenSSH
Watch-list
OpenSSH
Watch-list
 1.x
2.0.x
2.1.x
2.2.x
SSH Communications Security
Watch-list
SSH Secure Shell
Watch-list
 1.2.24
1.2.25
1.2.26
1.2.27
1.2.28
1.2.29
1.2.30
1.2.31

References

Tools & Filters

Nessus

 10607 10972

Snort

 1324 1326 1327

Credit
  • Michal Zalewski - lcamtufBrand New Doo Doocoredump.cx -

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