#VU32439 Race condition in dbus - CVE-2015-0245

Vulnerability identifier: #VU32439

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: CVE-2015-0245

CWE-ID: CWE-362

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
dbus
Universal components / Libraries / Libraries used by multiple products

Vendor: Freedesktop.org

Description

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

D-Bus 1.4.x through 1.6.x before 1.6.30, 1.8.x before 1.8.16, and 1.9.x before 1.9.10 does not validate the source of ActivationFailure signals, which allows local users to cause a denial of service (activation failure error returned) by leveraging a race condition involving sending an ActivationFailure signal before systemd responds.

Mitigation
Install update from vendor's website.

Vulnerable software versions

dbus: 1.6.0 - 1.6.28, 1.8.0 - 1.8.14, 1.9.0 - 1.9.8

---

External links
https://advisories.mageia.org/MGASA-2015-0071.html
https://lists.opensuse.org/opensuse-updates/2015-02/msg00066.html
https://www.debian.org/security/2015/dsa-3161
https://www.mandriva.com/security/advisories?name=MDVSA-2015:176
https://www.openwall.com/lists/oss-security/2015/02/09/6
https://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html

---

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.