CVE-2020-1763

An out-of-bounds buffer read flaw was found in the pluto daemon of libreswan from versions 3.27 till 3.31 where, an unauthenticated attacker could use this flaw to crash libreswan by sending specially-crafted IKEv1 Informational Exchange packets. The daemon respawns after the crash.

• CWE-125
• CWE-125

• https://bugzilla.redhat.com/show_bug.cgi?id=1813329Issue Tracking, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1763Issue Tracking, Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdfThird Party Advisory
• https://github.com/libreswan/libreswan/commit/471a3e41a449d7c753bc4edbba4239501bb62ba8Patch, Third Party Advisory
• https://libreswan.org/security/CVE-2020-1763/CVE-2020-1763.txtPatch, Vendor Advisory
• https://security.gentoo.org/glsa/202007-21Third Party Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-21-040-04Third Party Advisory, US Government Resource
• https://www.debian.org/security/2020/dsa-4684Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1813329Issue Tracking, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1763Issue Tracking, Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdfThird Party Advisory
• https://github.com/libreswan/libreswan/commit/471a3e41a449d7c753bc4edbba4239501bb62ba8Patch, Third Party Advisory
• https://libreswan.org/security/CVE-2020-1763/CVE-2020-1763.txtPatch, Vendor Advisory
• https://security.gentoo.org/glsa/202007-21Third Party Advisory
• https://us-cert.cisa.gov/ics/advisories/icsa-21-040-04Third Party Advisory, US Government Resource
• https://www.debian.org/security/2020/dsa-4684Third Party Advisory

Published

May 12, 2020

Last Modified

Jun 17, 2026

Status

Modified

• 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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