795 : Multiple Vendor SSH CRC-32 detect_attack() Function Overflow
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Views This Week Views All Time Added to OSVDB Last Modified Modified (since 2008) Percent Complete
9 1626 over 9 years ago about 1 year ago 6 times 90%

Timeline
Disclosure Date Exploit Publish Date
2001-02-08 2001-02-21

Keywords

 x2

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
Attack Type: Input Manipulation
Impact: Loss of Integrity
Exploit: Exploit Public
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
10607 10972

Snort

 1324 1326 1327
1980

Credit
  • Michal Zalewski - lcamtufdione.ids.pl - Personal page

CVSSv2 Score

CVSSv2 Base Score = 10.0
Source: nvd.nist.gov | Generated: 2003-12-31 | Disagree?

Access_vector_2 Access_complexity_2 Authentication_2 Confidentiality_impact_2 Integrity_impact_2 Availability_impact_2

Blogs

This product uses the Daylife API but is not endorsed or certified by Daylife.

This section lists the latest news and blogs found via the daylife API (and for older items, the technorati API), which mention or otherwise discuss this vulnerability.

None found at this time

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