#VU27709 Input validation error


Published: 2020-05-12

Vulnerability identifier: #VU27709

Vulnerability risk: Medium

CVSSv3: 6.5 [CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-1763

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
libreswan
Universal components / Libraries / Libraries used by multiple products

Vendor: libreswan.org

Description

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
Install updates from vendor's website.

Vulnerable software versions

libreswan: 3.27, 3.28, 3.29, 3.30, 3.31

CPE

External links
https://github.com/libreswan/libreswan/commit/471a3e41a449d7c753bc4edbba4239501bb62ba8


Q & A

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.


Latest bulletins with this vulnerability