CVE-2020-1763

Libreswan vulnerability

CVSS

7.5

EPSS

3.3%

EPSS pct

87th

Exploited

No known

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.

Affected vendor

Libreswan

Affected product

Libreswan

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness type (CWE)

CWE-125 — Out-of-bounds Read

Published

2020-05-12

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to availability.

Its EPSS score of 3.3% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2020-1763

Confirm whether Libreswan Libreswan is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2020-1763.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2020-1763

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2020-1763 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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