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CVE-2019-1549

5.3 · MEDIUM

OpenSSL 1.1.1 introduced a rewritten random number generator (RNG).

Published Sep 10, 2019CWE-330EPSS 6.18%

Overview

CVE-2019-1549 is a medium-severity vulnerability. It was published on September 10, 2019 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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).

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=1b0fe00e2704b5e20334a16d3c9099d1ba2ef1beReflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GY6SNRJP2S7Y42GIIDO3HXPNMDYN2U3A/Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZN4VVQJ3JDCHGIHV4Y2YTXBYQZ6PWQ7E/Refseclists.org/bugtraq/2019/Oct/1Refsecurity.netapp.com/advisory/ntap-20190919-0002/Refsupport.f5.com/csp/article/K44070243Refsupport.f5.com/csp/article/K44070243?utm_source=f5support&amp%3Butm_medium=RSSRefusn.ubuntu.com/4376-1/Refwww.debian.org/security/2019/dsa-4539Refwww.openssl.org/news/secadv/20190910.txt

How CyberStrike helps

Frequently asked questions

What is CVE-2019-1549?

CVE-2019-1549 is a medium-severity vulnerability. It was published on September 10, 2019 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2019-1549?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2019-1549?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2019-1549?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-1549 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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