Vulnerability identifier: #VU10821

Vulnerability risk: Low

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]

CVE-ID: CVE-2018-6459

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
strongSwan
Server applications / Encryption software

Vendor: strongswan.org

Description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition on the target system.

The weakness exists in the rsa_pss_params_parse function due to improper processing of RSAASSA-PSS signatures. A remote attacker can submit a specially crafted signature, trigger memory corruption and cause the service to crash.

Mitigation
Update to version 5.6.2.

Vulnerable software versions

strongSwan: 5.6.1

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External links
http://www.strongswan.org/blog/2018/02/19/strongswan-vulnerability-(cve-2018-6459).html

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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.