Out-of-bounds Read in Libreswan
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.036 (89.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.033 · newest: 0.036 · change: +0.003
Affected products
- Libreswan — versions 3.5
- The Libreswan Project — versions from versions 3.27 till 3.31
Weakness classification (CWE)
References
- libreswan.org/security/CVE-2020-1763/CVE-2020-1763.txt (Patch, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- bugzilla.redhat.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
- github.com/libreswan/libreswan/commit/471a3e41a449d7c753bc4edbba4239501bb62ba8 (Patch, Third Party Advisory)
- www.debian.org/security/2020/dsa-4684 (vendor-advisory, Third Party Advisory)
- security.gentoo.org/glsa/202007-21 (vendor-advisory, Third Party Advisory)
- cert-portal.siemens.com/productcert/pdf/ssa-379803.pdf (Third Party Advisory)
- us-cert.cisa.gov/ics/advisories/icsa-21-040-04 (US Government Resource, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-1763?
- CVE-2020-1763 is a high-severity vulnerability in Libreswan, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2020-05-12.
- How severe is CVE-2020-1763?
- High severity. CVSS v3 base score is 7.5 out of 10.