PT-2009-2755 · Openssl+1 · Openssl+1

Published 2009-01-07 · Updated 2018-10-11 · CVE-2009-0049

Positive Technologies (AI Summary)

CVSS v2.0

5.0

Medium

Base vector

AV:N/AC:L/Au:N/C:P/I:N/A:N

Name of the Vulnerable Software and Affected Versions Belgian eID middleware (eidlib) versions 2.6.0 and earlier

Description The issue allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys. This occurs because the return value from the OpenSSL EVP VerifyFinal function is not properly checked.

Recommendations For versions 2.6.0 and earlier, ensure proper checking of the return value from the OpenSSL EVP VerifyFinal function to prevent bypassing of certificate chain validation. As a temporary workaround, consider restricting the use of DSA and ECDSA keys until a patch is available.

Fix

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

CVE-2009-0049

DSA-1946-1

Affected Products

Openssl

Eidlib

References · 5

• http://lists.opensuse.org/opensuse-security-announce/2009-03/msg00000.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2009-0049 · Security Note
• http://secunia.com/advisories/34029 · Note
• http://securityfocus.com/archive/1/499827/100/0/threaded · Note
• http://ocert.org/advisories/ocert-2008-016.html · Note