#VU33727 Input validation error in polkit - CVE-2015-4625

Vulnerability identifier: #VU33727

Vulnerability risk: Medium

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

CVE-ID: CVE-2015-4625

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
polkit
Other software / Other software solutions

Vendor: Freedesktop.org

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

Integer overflow in the authentication_agent_new_cookie function in PolicyKit (aka polkit) before 0.113 allows local users to gain privileges by creating a large number of connections, which triggers the issuance of a duplicate cookie value.

Mitigation
Install update from vendor's website.

Vulnerable software versions

polkit: 0.91 - 0.112

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External links
https://lists.fedoraproject.org/pipermail/package-announce/2015-July/161721.html
https://lists.fedoraproject.org/pipermail/package-announce/2015-July/162294.html
https://lists.freedesktop.org/archives/polkit-devel/2015-July/000432.html
https://lists.freedesktop.org/archives/polkit-devel/2015-June/000427.html
https://lists.freedesktop.org/archives/polkit-devel/2015-May/000419.html
https://lists.opensuse.org/opensuse-security-announce/2015-10/msg00010.html
https://lists.opensuse.org/opensuse-updates/2015-11/msg00042.html
https://www.openwall.com/lists/oss-security/2015/06/08/3
https://www.openwall.com/lists/oss-security/2015/06/09/1
https://www.openwall.com/lists/oss-security/2015/06/16/21
https://www.securityfocus.com/bid/75267
https://www.securitytracker.com/id/1035023

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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.