Race condition in Freedesktop systemd

1) Race condition

EUVDB-ID: #VU43885

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-2012-1174

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 manipulate or delete data.

The rm_rf_children function in util.c in the systemd-logind login manager in systemd before 44, when logging out, allows local users to delete arbitrary files via a symlink attack on unspecified files, related to "particular records related with user session."

Mitigation

Install update from vendor's website.

Vulnerable software versions

systemd: 43

CPE2.3

• cpe:2.3:a:freedesktop_org:systemd:43:*:*:*:*:*:*:*

External links

http://cgit.freedesktop.org/systemd/systemd/commit/?id=5ebff5337594d690b322078c512eb222d34aaa82
http://lists.fedoraproject.org/pipermail/package-announce/2012-April/079075.html
http://www.mandriva.com/security/advisories?name=MDVSA-2012:030
http://www.openwall.com/lists/oss-security/2012/03/16/21
http://bugzilla.redhat.com/show_bug.cgi?id=803358

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.