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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 3.57% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 88.9% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-05-12 13:41Z6 YR AGO
- Last updated
- 2024-08-04 06:46Z2 YR AGO
- Reserved
- 2019-11-27
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- High (CVSS 7.5)
- CNA CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-125Out-of-bounds ReadBase
- Data version
- 5.1
- Document digest
- d5b16a896b26ce841d50c20e2611f5689925cc8ac1e5b31fc94ec3c3d660e4e4
05 Affected products
06 References
- libreswan.orghttps://libreswan.org/security/CVE-2020-1763/CVE-2020-1763.txt
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1763
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1813329
- github.comhttps://github.com/libreswan/libreswan/commit/471a3e41a449d7c753bc4edbba4239501bb62ba8
- www.debian.orgDSA-4684https://www.debian.org/security/2020/dsa-4684
- security.gentoo.orgGLSA-202007-21https://security.gentoo.org/glsa/202007-21
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-379803.pdf
- us-cert.cisa.govhttps://us-cert.cisa.gov/ics/advisories/icsa-21-040-04
07 Fixed in
Debian 12
- libreswan Fixed in 3.32-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libreswan Fixed in 3.32-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libreswan Fixed in 3.32-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- libreswan No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- libreswan No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.