Auth bypass in OpenSSL
CVE-2009-0591
The CMS_verify function in OpenSSL 0.9.8h through 0.9.8j, when CMS is enabled, does not properly handle errors associated with malformed signed attributes, which allows remote attackers to repudiate a signature that originally appeared to be valid but was actually invalid.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v2 metric
CVSS v2 base score 2.6 (Low). Vector: AV:N/AC:H/Au:N/C:N/I:P/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.027 (85.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000
Affected products
- OpenSSL — versions 0.9.8h, 0.9.8i, 0.9.8j
Weakness classification (CWE)
Public proof-of-concept exploits
References
- marc.info/ (vendor-advisory)
- www.vupen.com/english/advisories/2009/0850 (vdb-entry, Vendor Advisory)
- www.vupen.com/english/advisories/2009/1175 (vdb-entry)
- secunia.com/advisories/42724 (third-party-advisory)
- exchange.xforce.ibmcloud.com/vulnerabilities/49432 (vdb-entry)
- sourceforge.net/project/shownotes.php
- secunia.com/advisories/34666 (third-party-advisory)
- www.vupen.com/english/advisories/2009/1020 (vdb-entry)
- secunia.com/advisories/35729 (third-party-advisory)
- secunia.com/advisories/35380 (third-party-advisory)
Frequently asked questions
- What is CVE-2009-0591?
- CVE-2009-0591 is a vulnerability in OpenSSL, classified under Improper Authentication. Published 2009-03-27.
- Is CVE-2009-0591 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.