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CVE-2019-1549

Status Candidate

Overview

OpenSSL 1.1.1 introduced a rewritten random number generator (RNG). This was intended to include protection in the event of a fork() system call in order to ensure that the parent and child processes did not share the same RNG state. However this protection was not being used in the default case. A partial mitigation for this issue is that the output from a high precision timer is mixed into the RNG state so the likelihood of a parent and child process sharing state is significantly reduced. If an application already calls OPENSSL_init_crypto() explicitly using OPENSSL_INIT_ATFORK then this problem does not occur at all. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c).

Related Files

Red Hat Security Advisory 2020-3194-01
Posted Jul 29, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-3194-01 - OpenShift Virtualization is Red Hat's virtualization solution designed for Red Hat OpenShift Container Platform. Issues addressed include a man-in-the-middle vulnerability.

tags | advisory
systems | linux, redhat
advisories | CVE-2018-14404, CVE-2018-18074, CVE-2018-19519, CVE-2018-20060, CVE-2018-20337, CVE-2018-20852, CVE-2018-7263, CVE-2018-9251, CVE-2019-1010180, CVE-2019-1010204, CVE-2019-11236, CVE-2019-11324, CVE-2019-12447, CVE-2019-12448, CVE-2019-12449, CVE-2019-13232, CVE-2019-13752, CVE-2019-13753, CVE-2019-14563, CVE-2019-14822, CVE-2019-1547, CVE-2019-1549, CVE-2019-1563, CVE-2019-15847, CVE-2019-16056, CVE-2019-17451
SHA-256 | ab12a5414b74ae4ec0875438bd155092413bb637cd1033a63c83f8057805a037
Ubuntu Security Notice USN-4376-1
Posted May 28, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4376-1 - It was discovered that OpenSSL incorrectly handled ECDSA signatures. An attacker could possibly use this issue to perform a timing side-channel attack and recover private ECDSA keys. Matt Caswell discovered that OpenSSL incorrectly handled the random number generator. This may result in applications that use the fork system call sharing the same RNG state between the parent and the child, contrary to expectations. This issue only affected Ubuntu 18.04 LTS and Ubuntu 19.10.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2019-1547, CVE-2019-1549, CVE-2019-1551, CVE-2019-1563
SHA-256 | e20de866e28c83e8f20de501782e4da4bf3f8fcaa6fcfbdc5b5e842700cd1f27
Red Hat Security Advisory 2020-1840-01
Posted Apr 28, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-1840-01 - OpenSSL is a toolkit that implements the Secure Sockets Layer and Transport Layer Security protocols, as well as a full-strength general-purpose cryptography library. Issues addressed include an information leakage vulnerability.

tags | advisory, protocol
systems | linux, redhat
advisories | CVE-2019-1547, CVE-2019-1549, CVE-2019-1563
SHA-256 | 179c450f5486128e09d227d463e27144c9b0b365175069306e8100d7c94d5fe9
Red Hat Security Advisory 2020-1337-01
Posted Apr 7, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-1337-01 - This release adds the new Apache HTTP Server 2.4.37 Service Pack 2 packages that are part of the JBoss Core Services offering. This release serves as a replacement for Red Hat JBoss Core Services Pack Apache Server 2.4.37 Service Pack 1 and includes bug fixes and enhancements. Issues addressed include cross site scripting and information leakage vulnerabilities.

tags | advisory, web, vulnerability, xss
systems | linux, redhat
advisories | CVE-2019-10081, CVE-2019-10082, CVE-2019-10092, CVE-2019-10097, CVE-2019-10098, CVE-2019-1547, CVE-2019-1549, CVE-2019-1563
SHA-256 | f5fa6f7bb5d7a7d309a8775da86642e1bf6dd537d5dd050f80f0f912e8b85506
Red Hat Security Advisory 2020-1336-01
Posted Apr 7, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-1336-01 - Red Hat JBoss Core Services is a set of supplementary software for Red Hat JBoss middleware products. This software, such as Apache HTTP Server, is common to multiple JBoss middleware products, and is packaged under Red Hat JBoss Core Services to allow for faster distribution of updates, and for a more consistent update experience. This release adds the new Apache HTTP Server 2.4.37 Service Pack 2 packages that are part of the JBoss Core Services offering. This release serves as a replacement for Red Hat JBoss Core Services Pack Apache Server 2.4.37 Service Pack 1 and includes bug fixes and enhancements. Issues addressed include cross site scripting and information leakage vulnerabilities.

tags | advisory, web, vulnerability, xss
systems | linux, redhat
advisories | CVE-2019-10081, CVE-2019-10082, CVE-2019-10092, CVE-2019-10097, CVE-2019-10098, CVE-2019-1547, CVE-2019-1549, CVE-2019-1563
SHA-256 | 5898d1e008b3119bd09596bf525e8c009122f59f9884463cf27a8b718a6c7d0a
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
SHA-256 | bfbb11b91e11daa3793311922876b6211bfc3e40e8f82df31993c0acb0429b23
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-2019-1552, CVE-2019-1563
SHA-256 | 1e3a91bc1f9dfce01af26026f856e064eab4c8ee0a8f457b5ae30b40b8b711f2
OpenSSL Security Advisory 20190910
Posted Sep 10, 2019
Site openssl.org

OpenSSL Security Advisory 20190910 - Normally in OpenSSL EC groups always have a co-factor present and this is used in side channel resistant code paths. However, in some cases, it is possible to construct a group using explicit parameters (instead of using a named curve). In those cases it is possible that such a group does not have the cofactor present. This can occur even where all the parameters match a known named curve. Other issues were also addressed.

tags | advisory
advisories | CVE-2019-1547, CVE-2019-1549, CVE-2019-1563
SHA-256 | 9aabd4d3854b3b34e811a20f6d073061497a1f35b60c234fd00725cb1cb66a77
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