Multiple vulnerabilities in libreswan

1) Input validation error

EUVDB-ID: #VU42103

Risk: Medium

CVSSv3.1: 4.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:U/RC:C]

CVE-ID: CVE-2013-6467

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can cause a denial of service (NULL pointer dereference and IKE daemon restart) via IKEv2 packets that lack expected payloads.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libreswan: 3.0 - 3.6

External links

http://osvdb.org/102172
http://secunia.com/advisories/56420
http://www.securityfocus.com/bid/64987
http://exchange.xforce.ibmcloud.com/vulnerabilities/90522
http://libreswan.org/security/CVE-2013-6467/CVE-2013-6467.txt

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.

2) Race condition

EUVDB-ID: #VU42171

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-7283

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

Race condition in the libreswan.spec files for Red Hat Enterprise Linux (RHEL) and Fedora packages in libreswan 3.6 has unspecified impact and attack vectors, involving the /var/tmp/libreswan-nss-pwd temporary file.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libreswan: 3.6

External links

http://secunia.com/advisories/56276
http://www.osvdb.org/101575
http://github.com/libreswan/libreswan/commit/ef2d756e73a188401c36133c2e2f7ce4f3c6ae55
http://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.

3) Input validation error

EUVDB-ID: #VU42179

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2013-4564

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

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

Libreswan 3.6 allows remote attackers to cause a denial of service (crash) via a small length value and (1) no version or (2) an invalid major number in an IKE packet.

Mitigation

Install update from vendor's website.

Vulnerable software versions

libreswan: 3.6

External links

http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124911.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124928.html
http://lists.fedoraproject.org/pipermail/package-announce/2013-December/124943.html
http://secunia.com/advisories/56276
http://libreswan.org/security/CVE-2013-4564/CVE-2013-4564.txt.asc
http://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.