CVE-2010-2524

moderate-risk
Published 2010-09-08

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.

Do I need to act?

-
0.09% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.8/10 High
LOCAL / LOW complexity

Affected Products (11)

Esx
Esx

Affected Vendors

Vmware Linux Canonical Suse

References (26)

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=...
Mailing List http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html
Mailing List http://marc.info/?l=oss-security&m=128072090331700&w=2
Mailing List http://marc.info/?l=oss-security&m=128078387328921&w=2
Mailing List http://marc.info/?l=oss-security&m=128080755321157&w=2
Broken Link http://secunia.com/advisories/43315
Broken Link http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35
Broken Link http://www.mandriva.com/security/advisories?name=MDVSA-2010:172
Broken Link http://www.redhat.com/support/errata/RHSA-2010-0610.html
Third Party Advisory http://www.securityfocus.com/archive/1/516397/100/0/threaded
Third Party Advisory http://www.ubuntu.com/usn/USN-1000-1
Patch http://www.vmware.com/security/advisories/VMSA-2011-0003.html
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=612166
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=...
Mailing List http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.html
Mailing List http://marc.info/?l=oss-security&m=128072090331700&w=2
Mailing List http://marc.info/?l=oss-security&m=128078387328921&w=2
Mailing List http://marc.info/?l=oss-security&m=128080755321157&w=2
Broken Link http://secunia.com/advisories/43315
Broken Link http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35
and 6 more references
40
/ 100
moderate-risk
Severity 24/34 · High
Exploitability 0/34 · Minimal
Exposure 16/34 · Moderate