28549 : OpenSSL RSA Key PKCS #1 v1.5 Signature Forgery
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Info

Last Modified
10 months ago

Percent Complete
100%

Disclosure
Sep 05, 2006

Discovery
Unknown

Dates

Exploit
Unknown

Solution
Unknown

Keywords

 HPSBMA02250,SSRT061275 HPSBMA02250,SSRT061275

Description

 OpenSSL contains a flaw that may allow a malicious user to bypass certain security restrictions. The issue is triggered 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. It is possible that the flaw may allow bypassing security restrictions resulting in a loss of integrity.

Classification

 Location: Remote/Network Access Required
Attack Type: Authentication Management, Cryptographic
Impact: Loss of Integrity
Exploit: Exploit Unknown
Disclosure: OSVDB Verified

Solution

 Upgrade to version 0.9.8c, 0.9.7k or higher, as it has been reported to fix this vulnerability. An upgrade is required as there are no known workarounds.

Products
OpenSSL Project
Watch-list
OpenSSL
Watch-list
 0.9.7j
0.9.8b
CyberGuard Corporation
Watch-list
SnapGear
Watch-list
 3.1.4u1

References

Tools & Filters

Nessus

 22327 22331 22348 22428 22715 22716 22892 23905 23951 24028 24176 24320 24552 24592 27166 27367 27374 27918 29386 29541 29702

Credit
  • Daniel Bleichenbacher -

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