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TITLE:
SSH Tectia Products RSA Signature Forgery Vulnerability

SECUNIA ADVISORY ID:
SA22350

VERIFY ADVISORY:
http://secunia.com/advisories/22350/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
>From remote

SOFTWARE:
SSH Tectia Server for IBM z/OS 5.x
http://secunia.com/product/12303/
SSH Tectia Client 4.x
http://secunia.com/product/3234/
SSH Tectia Client 5.x
http://secunia.com/product/12301/
SSH Tectia Manager 2.x
http://secunia.com/product/11677/
SSH Tectia Server 4.x
http://secunia.com/product/3233/
SSH Tectia Server 5.x
http://secunia.com/product/6528/

DESCRIPTION:
A vulnerability has been reported in SSH Tectia Server, SSH Tectia
Manager, and SSH Tectia Client, which can be exploited by malicious
people to bypass certain security restrictions.

The vulnerability is caused due to an error within the verification
of certain signatures. If an RSA key with exponent 3 is used, it may
be possible to forge a PKCS #1 v1.5 signature signed by that key.

The vulnerability is reported in the following products:
* SSH Tectia Server prior to 5.1.1
* SSH Tectia Manager prior to 2.2.1
* SSH Tectia Server for IBM z/OS prior to 5.2.1
* SSH Tectia Client prior to 5.1.1

SOLUTION:
Update to a fixed version.

SSH Tectia Server:
Update to version 5.1.1.

SSH Tectia Manager:
Update to version 2.2.1.

SSH Tectia Server for IBM z/OS:
Update to version 5.2.1.

SSH Tectia Client:
Update to version 5.1.1.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://www.ssh.com/documents/33/SSH_Tectia_Server_5.1.1_releasenotes.txt
http://www.ssh.com/documents/33/SSH_Tectia_Manager_2.2.1_releasenotes.txt
http://www.ssh.com/documents/33/SSH_Tectia_Server_zOS_5.2.1_releasenotes.txt
http://www.ssh.com/documents/33/SSH_Tectia_Client_5.1.1_releasenotes.txt

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

Subscribe:
http://secunia.com/secunia_security_advisories/

Definitions: (Criticality, Where etc.)
http://secunia.com/about_secunia_advisories/


Please Note:
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clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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