High severity7.5NVD Advisory· Published May 12, 2020· Updated Jun 17, 2026

CVE-2020-1763

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Libreswan/Libreswan4 versions
cpe:2.3:a:libreswan:libreswan:*:*:*:*:*:*:*:*+ 3 more
- cpe:2.3:a:libreswan:libreswan:*:*:*:*:*:*:*:*range: >=3.27,<=3.31
- cpe:2.3:a:libreswan:libreswan:3.5:*:*:*:*:*:*:*
- (no CPE)range: 3.27 - 3.31
- (no CPE)range: from versions 3.27 till 3.31

Patches

Vulnerability mechanics

References

github.com/libreswan/libreswan/commit/471a3e41a449d7c753bc4edbba4239501bb62ba8nvdPatchThird Party Advisory
libreswan.org/security/CVE-2020-1763/CVE-2020-1763.txtnvdPatchVendor Advisory
bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party Advisory
bugzilla.redhat.com/show_bug.cginvdIssue TrackingThird Party Advisory
cert-portal.siemens.com/productcert/pdf/ssa-379803.pdfnvdThird Party Advisory
security.gentoo.org/glsa/202007-21nvdThird Party Advisory
us-cert.cisa.gov/ics/advisories/icsa-21-040-04nvdThird Party AdvisoryUS Government Resource
www.debian.org/security/2020/dsa-4684nvdThird Party Advisory

News mentions

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cvss	0.488
epss	0.003
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000