--- id: CVE-2019-1563 title: >- 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 … summary: >- 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 … severity: low cvss: 3.7 cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N' cwe: - CWE-203 - CWE-327 vendor: openssl product: openssl affected: - 'openssl >= 1.0.2, <= 1.0.2s' - 'openssl >= 1.1.0, <= 1.1.0k' - 'openssl >= 1.1.1, <= 1.1.1c' published: '2019-09-10' updated: '2026-10-08' sourceUpdated: '2026-10-08T22:16:52.290' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2019-1563' references: - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00054.html' label: openssl-security@openssl.org - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00072.html' label: openssl-security@openssl.org - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00012.html' label: openssl-security@openssl.org - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00016.html' label: openssl-security@openssl.org - url: >- http://packetstormsecurity.com/files/154467/Slackware-Security-Advisory-openssl-Updates.html label: openssl-security@openssl.org - url: >- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=08229ad838c50f644d7e928e2eef147b4308ad64 label: openssl-security@openssl.org - url: >- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=631f94db0065c78181ca9ba5546ebc8bb3884b97 label: openssl-security@openssl.org - url: >- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=e21f8cf78a125cd3c8c0d1a1a6c8bb0b901f893f label: openssl-security@openssl.org - url: 'https://kc.mcafee.com/corporate/index?page=content&id=SB10365' label: openssl-security@openssl.org - url: 'https://lists.debian.org/debian-lts-announce/2019/09/msg00026.html' label: openssl-security@openssl.org - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GY6SNRJP2S7Y42GIIDO3HXPNMDYN2U3A/ label: openssl-security@openssl.org - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZN4VVQJ3JDCHGIHV4Y2YTXBYQZ6PWQ7E/ label: openssl-security@openssl.org - url: 'https://seclists.org/bugtraq/2019/Oct/0' label: openssl-security@openssl.org - url: 'https://seclists.org/bugtraq/2019/Oct/1' label: openssl-security@openssl.org - url: 'https://seclists.org/bugtraq/2019/Sep/25' label: openssl-security@openssl.org - url: 'https://security.gentoo.org/glsa/201911-04' label: openssl-security@openssl.org - url: 'https://security.netapp.com/advisory/ntap-20190919-0002/' label: openssl-security@openssl.org - url: >- https://support.f5.com/csp/article/K97324400?utm_source=f5support&%3Butm_medium=RSS label: openssl-security@openssl.org - url: 'https://usn.ubuntu.com/4376-1/' label: openssl-security@openssl.org - url: 'https://usn.ubuntu.com/4376-2/' label: openssl-security@openssl.org - url: 'https://usn.ubuntu.com/4504-1/' label: openssl-security@openssl.org - url: 'https://www.debian.org/security/2019/dsa-4539' label: openssl-security@openssl.org - url: 'https://www.debian.org/security/2019/dsa-4540' label: openssl-security@openssl.org - url: 'https://www.openssl.org/news/secadv/20190910.txt' label: openssl-security@openssl.org - url: 'https://www.oracle.com/security-alerts/cpuapr2020.html' label: openssl-security@openssl.org - url: 'https://www.oracle.com/security-alerts/cpujan2020.html' label: openssl-security@openssl.org - url: 'https://www.oracle.com/security-alerts/cpujul2020.html' label: openssl-security@openssl.org - url: 'https://www.oracle.com/security-alerts/cpuoct2020.html' label: openssl-security@openssl.org - url: >- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html label: openssl-security@openssl.org - url: 'https://www.tenable.com/security/tns-2019-09' label: openssl-security@openssl.org - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00054.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-09/msg00072.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00012.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00016.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- http://packetstormsecurity.com/files/154467/Slackware-Security-Advisory-openssl-Updates.html label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=08229ad838c50f644d7e928e2eef147b4308ad64 label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=631f94db0065c78181ca9ba5546ebc8bb3884b97 label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=e21f8cf78a125cd3c8c0d1a1a6c8bb0b901f893f label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://kc.mcafee.com/corporate/index?page=content&id=SB10365' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2019/09/msg00026.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GY6SNRJP2S7Y42GIIDO3HXPNMDYN2U3A/ label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZN4VVQJ3JDCHGIHV4Y2YTXBYQZ6PWQ7E/ label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://seclists.org/bugtraq/2019/Oct/0' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://seclists.org/bugtraq/2019/Oct/1' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://seclists.org/bugtraq/2019/Sep/25' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://security.gentoo.org/glsa/201911-04' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://security.netapp.com/advisory/ntap-20190919-0002/' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://support.f5.com/csp/article/K97324400?utm_source=f5support&%3Butm_medium=RSS label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://usn.ubuntu.com/4376-1/' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://usn.ubuntu.com/4376-2/' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://usn.ubuntu.com/4504-1/' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.debian.org/security/2019/dsa-4539' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.debian.org/security/2019/dsa-4540' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.openssl.org/news/secadv/20190910.txt' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.oracle.com/security-alerts/cpuapr2020.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.oracle.com/security-alerts/cpujan2020.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.oracle.com/security-alerts/cpujul2020.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.oracle.com/security-alerts/cpuoct2020.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.tenable.com/security/tns-2019-09' label: af854a3a-2127-422b-91ae-364da2661108 tags: - nvd epss: 0.03838 epssPercentile: 0.89841 ingestedAt: '2026-10-08T23:16:47.299Z' --- ## Overview 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). ## Affected - `openssl >= 1.0.2, <= 1.0.2s` - `openssl >= 1.1.0, <= 1.1.0k` - `openssl >= 1.1.1, <= 1.1.1c` ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges.