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CVE-2012-0884

The implementation of Cryptographic Message Syntax (CMS) and PKCS #7 in OpenSSL before 0.9.8u and 1.x before 1.0.0h does not properly restrict certain oracle behavior, which makes it easier for context-dependent attackers to decrypt data via a Million Message Attack (MMA) adaptive chosen ciphertext attack.

Severity
Medium 5.0
Published
13 Mar 2012
Last changed
16 Jun 2026
Added to UpHeron
21 Oct 2026
Exploit chance
13% in the next 30 daysHigher than 96% of CVEs. EPSS by FIRST, 12 Nov 2026
Weakness
CWE-310
Attack
Over the network · No login needed
Attacker can
Read some data
CVSS vector
AV:N/AC:L/Au:N/C:P/I:N/A:N
Sources
NVD

Affected software

SoftwareAffected versions
OpenSSLServers and applications · cpe:a:openssl:openssl
  • Version 1.0.0g
  • Version 1.0.0f
  • Version 1.0.0e
  • Version 1.0.0d
All 66 release lines
  • Every version up to 0.9.8t
  • Version 0.9.0b
  • Version 0.9.1b
  • Version 0.9.1c
  • Version 0.9.2b
  • Version 0.9.3
  • Version 0.9.3a
  • Version 0.9.4
  • Version 0.9.5
  • Version 0.9.5a
  • Version 0.9.6
  • Version 0.9.6a
  • Version 0.9.6b
  • Version 0.9.6c
  • Version 0.9.6d
  • Version 0.9.6e
  • Version 0.9.6f
  • Version 0.9.6g
  • Version 0.9.6h
  • Version 0.9.6i
  • Version 0.9.6j
  • Version 0.9.6k
  • Version 0.9.6l
  • Version 0.9.6m
  • Version 0.9.7
  • Version 0.9.7a
  • Version 0.9.7b
  • Version 0.9.7c
  • Version 0.9.7d
  • Version 0.9.7e
  • Version 0.9.7f
  • Version 0.9.7g
  • Version 0.9.7h
  • Version 0.9.7i
  • Version 0.9.7j
  • Version 0.9.7k
  • Version 0.9.7l
  • Version 0.9.7m
  • Version 0.9.8
  • Version 0.9.8a
  • Version 0.9.8b
  • Version 0.9.8c
  • Version 0.9.8d
  • Version 0.9.8e
  • Version 0.9.8f
  • Version 0.9.8g
  • Version 0.9.8h
  • Version 0.9.8i
  • Version 0.9.8j
  • Version 0.9.8k
  • Version 0.9.8l
  • Version 0.9.8m
  • Version 0.9.8n
  • Version 0.9.8o
  • Version 0.9.8p
  • Version 0.9.8q
  • Version 0.9.8r
  • Version 0.9.8s
  • Version 1.0.0
  • Version 1.0.0a
  • Version 1.0.0b
  • Version 1.0.0c
  • Version 1.0.0d
  • Version 1.0.0e
  • Version 1.0.0f
  • Version 1.0.0g

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2012-0884
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2012-0884