PT-2009-2753 · Openssl · Openssl

Published 2009-01-07 · Updated 2018-10-11 · CVE-2009-0047

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 Gale versions 0.99 and earlier

Description The issue arises from improper checking of the return value from the OpenSSL EVP VerifyFinal function. This allows remote attackers to bypass validation of the certificate chain via a malformed SSL/TLS signature for DSA and ECDSA keys.

Recommendations For versions 0.99 and earlier, ensure proper validation of the certificate chain by correctly checking the return value from the OpenSSL EVP VerifyFinal function. As a temporary workaround, consider restricting the use of DSA and ECDSA keys until a proper fix is implemented.

Fix

Improper Authentication

Weakness Enumeration

CWE-310

CWE-287

Related Identifiers

CVE-2009-0047

Affected Products

Openssl

References · 4

• http://vupen.com/english/advisories/2009/0046 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2009-0047 · Security Note
• http://securityfocus.com/archive/1/499827/100/0/threaded · Note
• http://ocert.org/advisories/ocert-2008-016.html · Note