NULL pointer dereference in strongSwan

1) NULL pointer dereference

EUVDB-ID: #VU33044

Risk: Medium

CVSSv4.0: 6.6 [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/E:U/U:Green]

CVE-ID: CVE-2017-11185

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

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

CPE2.3

• cpe:2.3:a:strongswan_org:strongswan:5.0.0:*:*:*:*:*:*:*
• cpe:2.3:a:strongswan_org:strongswan:5.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:strongswan_org:strongswan:5.0.2:*:*:*:*:*:*:*

External links

https://www.debian.org/security/2017/dsa-3962
https://www.securityfocus.com/bid/100492
https://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.