This security advisory describes one medium risk vulnerability.
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C] [PCI]
Exploit availability: NoDescription
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.Mitigation
Update libreswan package to version 3.27-6+deb10u1.Vulnerable software versions
libreswan (Debian package): 3.27, 3.27-1, 3.27-2, 3.27-3, 3.27-4, 3.27-5, 3.27-6, 3.28-1, 3.29, 3.29-1, 3.29-2, 3.29-2+b1CPE
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.