CVE-2019-16779

In RubyGem excon before 0.71.0, there was a race condition around persistent connections, where a connection which is interrupted (such as by a timeout) would leave data on the socket. Subsequent requests would then read this data, returning content from the previous response. The race condition window appears to be short, and it would be difficult to purposefully exploit this.

• CWE-664
• CWE-362

• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00021.htmlThird Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00062.htmlThird Party Advisory
• https://github.com/excon/excon/commit/ccb57d7a422f020dc74f1de4e8fb505ab46d8a29Patch
• https://github.com/excon/excon/security/advisories/GHSA-q58g-455p-8vw9Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2020/01/msg00015.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00021.htmlThird Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00062.htmlThird Party Advisory
• https://github.com/excon/excon/commit/ccb57d7a422f020dc74f1de4e8fb505ab46d8a29Patch
• https://github.com/excon/excon/security/advisories/GHSA-q58g-455p-8vw9Vendor Advisory
• https://lists.debian.org/debian-lts-announce/2020/01/msg00015.htmlMailing List, Third Party Advisory

Published

Dec 16, 2019

Last Modified

Jul 28, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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