Vulnerability identifier: #VU45036

Vulnerability risk: Medium

CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2011-2147

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

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

Vendor: openswan.org

Description

The vulnerability allows a remote non-authenticated attacker to manipulate or delete data.

Openswan 2.2.x does not properly restrict permissions for (1) /var/run/starter.pid, related to starter.c in the IPsec starter, and (2) /var/lock/subsys/ipsec, which allows local users to kill arbitrary processes by writing a PID to a file, or possibly bypass disk quotas by writing arbitrary data to a file, as demonstrated by files with 0666 permissions, a different vulnerability than CVE-2011-1784.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Openswan: 2.2.0 - 2.2.1

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External links
http://lists.debian.org/debian-security/2011/05/msg00012.html
http://lists.debian.org/debian-security/2011/05/msg00013.html
http://lists.debian.org/debian-security/2011/05/msg00018.html
http://exchange.xforce.ibmcloud.com/vulnerabilities/67822

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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.