#VU32033 NULL pointer dereference in polkit - CVE-2015-3218
Vulnerability identifier: #VU32033
Vulnerability risk: Low
CVSSv4.0: 1.2 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID:
CWE-ID:
CWE-476
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
polkit
Other software /
Other software solutions
Vendor: Freedesktop.org
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in polkitbackend/polkitbackendinteractiveauthority.c in PolicyKit (aka polkit) before 0.113 allows local users to cause a denial of service (NULL pointer dereference and polkitd daemon crash) by calling RegisterAuthenticationAgent with an invalid object path. <a href="http://cwe.mitre.org/data/definitions/476. A remote attacker can perform a denial of service (DoS) attack.
Mitigation
Update to version 0.113.
Vulnerable software versions
polkit: 0.91 - 0.112
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-May/000420.html
https://lists.freedesktop.org/archives/polkit-devel/2015-May/000421.html
https://lists.opensuse.org/opensuse-security-announce/2015-10/msg00010.html
https://lists.opensuse.org/opensuse-updates/2015-11/msg00042.html
https://www.securityfocus.com/bid/76086
https://www.securitytracker.com/id/1035023
https://usn.ubuntu.com/3717-1/
Q & A
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
