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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.

Severity
Low 2.6
Published
27 Mar 2009
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
2.8% in the next 30 daysHigher than 86% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
Improper authentication (CWE-287)
Attack
Over the network · Only under certain conditions · No login needed
Attacker can
Change some data
CVSS vector
AV:N/AC:H/Au:N/C:N/I:P/A:N
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • Version 0.9.8h
  • Version 0.9.8i
  • Version 0.9.8j

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2009-0591
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2009-0591