#VU44513 Use-after-free in Openswan - CVE-2011-4073

Vulnerability identifier: #VU44513

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2011-4073

CWE-ID: CWE-416

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Openswan
Server applications / Remote access servers, VPN

Vendor: openswan.org

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing vectors related to the (1) quick_outI1_continue and (2) quick_outI1 functions. A remote authenticated users can cause a denial of service (pluto IKE daemon crash).

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Openswan: 2.3.0 - 2.6.36

---

External links
https://secunia.com/advisories/46678
https://secunia.com/advisories/46681
https://secunia.com/advisories/47342
https://www.debian.org/security/2011/dsa-2374
https://www.openswan.org/download/CVE-2011-4073/CVE-2011-4073.txt
https://www.redhat.com/support/errata/RHSA-2011-1422.html
https://www.securityfocus.com/bid/50440
https://www.securitytracker.com/id?1026268

---

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.