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Status Candidate


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).

Related Files

Gentoo Linux Security Advisory 201911-04
Posted Nov 8, 2019
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201911-4 - Multiple information disclosure vulnerabilities in OpenSSL allow attackers to obtain sensitive information. Versions less than 1.0.2t are affected.

tags | advisory, vulnerability, info disclosure
systems | linux, gentoo
advisories | CVE-2019-1547, CVE-2019-1563
MD5 | a0cdca0c47e2c6186ebd1d8dcdd89f58
Debian Security Advisory 4539-1
Posted Oct 2, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4539-1 - ECDSA, a padding oracle in PKCS7_dataDecode() and CMS_decrypt_set1_pkey() and it was discovered that a feature of the random number generator (RNG) intended to protect against shared RNG state between parent and child processes in the event of a fork() syscall was not used by default.

tags | advisory
systems | linux, debian
advisories | CVE-2019-1547, CVE-2019-1549, CVE-2019-1563
MD5 | cc0d2e9f89e952c84d6d63e3bf53a62c
Debian Security Advisory 4540-1
Posted Oct 2, 2019
Authored by Debian | Site debian.org

Debian Linux Security Advisory 4540-1 - ECDSA and a padding oracle in PKCS7_dataDecode() and CMS_decrypt_set1_pkey().

tags | advisory
systems | linux, debian
advisories | CVE-2019-1547, CVE-2019-1563
MD5 | 8f79b79b965a527586294186fdd183ba
Slackware Security Advisory - openssl Updates
Posted Sep 12, 2019
Authored by Slackware Security Team | Site slackware.com

Slackware Security Advisory - New openssl packages are available for Slackware 14.2 and -current to fix security issues.

tags | advisory
systems | linux, slackware
advisories | CVE-2019-1547, CVE-2019-1563
MD5 | 2f9e3a4d0a52e82bac4c1f57995b0bf9
OpenSSL Toolkit 1.1.1d
Posted Sep 11, 2019
Site openssl.org

OpenSSL is a robust, fully featured Open Source toolkit implementing the Secure Sockets Layer (SSL v2/v3) and Transport Layer Security (TLS v1) protocols with full-strength cryptography world-wide.

Changes: Fixed a fork protection issue. Added a bypass mitigation. Various other updates.
tags | tool, encryption, protocol
systems | unix
advisories | CVE-2019-1547, CVE-2019-1549, CVE-2019-1563
MD5 | 3be209000dbc7e1b95bcdf47980a3baa
Asterisk Project Security Advisory - AST-2019-005
Posted Sep 5, 2019
Authored by Gregory Massel | Site asterisk.org

Asterisk Project Security Advisory - When audio frames are given to the audio transcoding support in Asterisk the number of samples are examined and as part of this a message is output to indicate that no samples are present. A change was done to suppress this message for a particular scenario in which the message was not relevant. This change assumed that information about the origin of a frame will always exist when in reality it may not. This issue presented itself when an RTP packet containing no audio (and thus no samples) was received. In a particular transcoding scenario this audio frame would get turned into a frame with no origin information. If this new frame was then given to the audio transcoding support a crash would occur as no samples and no origin information would be present.

tags | advisory
advisories | CVE-2019-15639
MD5 | e0a632f4970b7e79ff0d9a8c7e4d1592
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