Input validation error in libreswan - CVE-2020-1763

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Main Vulnerability Database Vulnerabilities #VU27709

Input validation error in libreswan - CVE-2020-1763

Published: May 12, 2020


Vulnerability identifier: #VU27709
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-1763
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing IKEv1 informational exchange messages. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.


Affected software

libreswan
Gentoo Linux
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for x86_64 - Extended Update Support
libreswan (Debian package)
libreswan (Alpine package)
libreswan (Red Hat package)
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
Red Hat Enterprise Linux Server for x86_64 - Update Services for SAP Solutions
RUGGEDCOM ROS

How to mitigate CVE-2020-1763

Install updates from vendor's website.

libreswan - update to 3.32
libreswan (Debian package) - update to 3.27-6+deb10u1
libreswan (Red Hat package) - addressed in versions 3.27-10.el8_0, 3.29-7.el8_1, 3.29-7.el8_2
RUGGEDCOM ROS - update to 2.14.0

External References

Related Security Bulletins