CVE-2010-2524 Information

Description

The DNS resolution functionality in the CIFS implementation in the Linux kernel before 2.6.35 when CONFIG_CIFS_DFS_UPCALL is enabled relies on a user’s keyring for the dns_resolver upcall in the cifs.upcall userspace helper which allows local users to spoof the results of DNS queries and perform arbitrary CIFS mounts via vectors involving an add_key call related to a \cache stuffing\ issue and MS-DFS referrals.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Reference

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4c0c03ca54f72fdd5912516ad0a23ec5cf01bda7 http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html http://marc.info/?l=oss-security&m=128072090331700&w=2 http://marc.info/?l=oss-security&m=128078387328921&w=2 http://marc.info/?l=oss-security&m=128080755321157&w=2 http://secunia.com/advisories/43315 http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35 http://www.mandriva.com/security/advisories?name=MDVSA-2010:172 http://www.redhat.com/support/errata/RHSA-2010-0610.html http://www.securityfocus.com/archive/1/516397/100/0/threaded http://www.ubuntu.com/usn/USN-1000-1 http://www.vmware.com/security/advisories/VMSA-2011-0003.html https://bugzilla.redhat.com/show_bug.cgi?id=612166

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

7.8