Padding Oracle in PKCS7_dataDecode and CMS_decrypt_set1_pkey
Vulnerability Description
In situations where an attacker receives automated notification of the success or failure of a decryption attempt an attacker, after sending a very large number of messages to be decrypted, can recover a CMS/PKCS7 transported encryption key or decrypt any RSA encrypted message that was encrypted with the public RSA key, using a Bleichenbacher padding oracle attack. Applications are not affected if they use a certificate together with the private RSA key to the CMS_decrypt or PKCS7_decrypt functions to select the correct recipient info to decrypt. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Bernd Edlinger
References
- https://seclists.org/bugtraq/2019/Sep/25
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00054.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GY6SNRJP2S7Y42GIIDO3HXPNMDYN2U3A/
- http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00072.html
- https://lists.debian.org/debian-lts-announce/2019/09/msg00026.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZN4VVQJ3JDCHGIHV4Y2YTXBYQZ6PWQ7E/
- https://seclists.org/bugtraq/2019/Oct/1
- https://seclists.org/bugtraq/2019/Oct/0
- https://www.debian.org/security/2019/dsa-4539
- https://www.debian.org/security/2019/dsa-4540
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00012.html
- http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00016.html
- https://security.gentoo.org/glsa/201911-04
- https://usn.ubuntu.com/4376-1/
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html
- https://www.oracle.com/security-alerts/cpujan2020.html
- https://www.openssl.org/news/secadv/20190910.txt
- http://packetstormsecurity.com/files/154467/Slackware-Security-Advisory-openssl-Updates.html
- https://security.netapp.com/advisory/ntap-20190919-0002/
- https://www.tenable.com/security/tns-2019-09
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=08229ad838c50f644d7e928e2eef147b4308ad64
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=631f94db0065c78181ca9ba5546ebc8bb3884b97
- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=e21f8cf78a125cd3c8c0d1a1a6c8bb0b901f893f
- https://support.f5.com/csp/article/K97324400?utm_source=f5support&%3Butm_medium=RSS
- https://usn.ubuntu.com/4376-2/
- https://usn.ubuntu.com/4504-1/
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://kc.mcafee.com/corporate/index?page=content&id=SB10365
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Timeline
CVSS Vectors
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.