Vulnerability identifier: #VU33044

Vulnerability risk: Medium

CVSSv3.1: 6.5 [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-2017-11185

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
strongSwan
Server applications / Encryption software

Vendor: strongswan.org

Description

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

The vulnerability exists due to a NULL pointer dereference error. A remote attacker can trigger denial of service conditions via a crafted RSA signature.

Mitigation
Update to version 5.6.0.

Vulnerable software versions

strongSwan: 5.0.0 - 5.5.3

---

External links
http://www.debian.org/security/2017/dsa-3962
http://www.securityfocus.com/bid/100492
http://www.strongswan.org/blog/2017/08/14/strongswan-vulnerability-(cve-2017-11185).html

---

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.