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CERT Coordination Center

Portable OpenSSH server PAM conversion stack corruption

Vulnerability Note VU#209807

Original Release Date: 2003-09-24 | Last Revised: 2003-09-24


There is a vulnerability in the Portable OpenSSH server that may corrupt the PAM conversion stack.


The Portable OpenSSH server contains a vulnerability that may permit an attacker to corrupt the PAM conversion stack. Versions 3.7p1 and 3.7.1p1 are affected. Note that the OpenBSD-specific releases are not affected by this issue.


The complete impact of this vulnerability is not yet known, but may lead to privilege escalation, or a denial of service.


OpenSSH has announced version 3.7.1p2 to resolve this issue.

This issue can be mitigated by not using PAM. Set "UsePAM no" in sshd_config.

Vendor Information

Affected   Unknown   Unaffected


Updated:  September 24, 2003



Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.


The CERT/CC has no additional comments at this time.

If you have feedback, comments, or additional information about this vulnerability, please send us email.

CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A



Thanks to OpenSSH for reporting this vulnerability.

This document was written by Jason A Rafail.

Other Information

CVE IDs: CVE-2003-0787
Severity Metric: 1.50
Date Public: 2003-09-23
Date First Published: 2003-09-24
Date Last Updated: 2003-09-24 15:06 UTC
Document Revision: 2

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