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CVE-2019-16782

6.3 · MEDIUM

There's a possible information leak / session hijack vulnerability in Rack (RubyGem rack).

Published Dec 18, 2019CWE-208EPSS 3.70%

Overview

CVE-2019-16782 is a medium-severity vulnerability. It was published on December 18, 2019 and has a CVSS 3.1 base score of 6.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

There's a possible information leak / session hijack vulnerability in Rack (RubyGem rack). This vulnerability is patched in versions 1.6.12 and 2.0.8. Attackers may be able to find and hijack sessions by using timing attacks targeting the session id. Session ids are usually stored and indexed in a database that uses some kind of scheme for speeding up lookups of that session id. By carefully measuring the amount of time it takes to look up a session, an attacker may be able to find a valid session id and hijack the session. The session id itself may be generated randomly, but the way the session is indexed by the backing store does not use a secure comparison.

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

Reflists.opensuse.org/opensuse-security-announce/2020-02/msg00016.htmlRefwww.openwall.com/lists/oss-security/2019/12/18/2Refwww.openwall.com/lists/oss-security/2019/12/18/3Refwww.openwall.com/lists/oss-security/2019/12/19/3Refwww.openwall.com/lists/oss-security/2020/04/08/1Refwww.openwall.com/lists/oss-security/2020/04/09/2GitHubgithub.com/rack/rack/commit/7fecaee81f59926b6e1913511c90650e76673b38GitHubgithub.com/rack/rack/security/advisories/GHSA-hrqr-hxpp-chr3Reflists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/HZXMWILCICQLA2BYSP6I2CRMUG53YBLX/Reflists.opensuse.org/opensuse-security-announce/2020-02/msg00016.html

How CyberStrike helps

Frequently asked questions

What is CVE-2019-16782?

CVE-2019-16782 is a medium-severity vulnerability. It was published on December 18, 2019 and has a CVSS 3.1 base score of 6.3 (MEDIUM).

How severe is CVE-2019-16782?

This vulnerability has a CVSS 3.1 base score of 6.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2019-16782?

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-2019-16782?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2019-16782 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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