Input validation error in libreswan

1) Input validation error

EUVDB-ID: #VU42149

Risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2013-7294

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to perform service disruption.

The ikev2parent_inI1outR1 function in pluto/ikev2_parent.c in libreswan before 3.7 allows remote attackers to cause a denial of service (restart) via an IKEv2 I1 notification without a KE payload.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libreswan: 3.0 - 3.5

CPE2.3

• cpe:2.3:a:libreswan.org:libreswan:3.0:*:*:*:*:*:*:*
• cpe:2.3:a:libreswan.org:libreswan:3.1:*:*:*:*:*:*:*
• cpe:2.3:a:libreswan.org:libreswan:3.2:*:*:*:*:*:*:*

External links

https://secunia.com/advisories/56276
https://secunia.com/advisories/56915
https://www.osvdb.org/101573
https://github.com/libreswan/libreswan/commit/2899351224fe2940aec37d7656e1e392c0fe07f0
https://lists.libreswan.org/pipermail/swan-announce/2013/000007.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.