Vulnerability identifier: #VU42783
Vulnerability risk: Medium
CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-264
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
The cifs_find_smb_ses function in fs/cifs/connect.c in the Linux kernel before 2.6.36 does not properly determine the associations between users and sessions, which allows local users to bypass CIFS share authentication by leveraging a mount of a share by a different user.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel: 2.6.0 - 2.6.35.13
External links
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4ff67b720c02c36e54d55b88c2931879b7db1cd2
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html
http://www.openwall.com/lists/oss-security/2011/04/15/8
http://bugzilla.redhat.com/show_bug.cgi?id=697394
http://github.com/torvalds/linux/commit/4ff67b720c02c36e54d55b88c2931879b7db1cd2
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.