Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 2.6.35 |
| Vmware | Esx | 4.0 |
| Canonical | Ubuntu Linux | 6.06 |
| Suse | Suse Linux Enterprise Desktop | 11 |
| Suse | Suse Linux Enterprise Server | 11 |
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.htmlMailing ListThird Party Advisory
- http://marc.info/?l=oss-security&m=128072090331700&w=2Mailing ListPatchThird Party Advisory
- http://marc.info/?l=oss-security&m=128078387328921&w=2Mailing ListPatchThird Party Advisory
- http://marc.info/?l=oss-security&m=128080755321157&w=2Mailing ListThird Party Advisory
- http://secunia.com/advisories/43315Broken Link
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.35Broken Link
- http://www.mandriva.com/security/advisories?name=MDVSA-2010:172Broken Link
- http://www.redhat.com/support/errata/RHSA-2010-0610.htmlBroken Link
- http://www.securityfocus.com/archive/1/516397/100/0/threadedThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-1000-1Third Party Advisory
- http://www.vmware.com/security/advisories/VMSA-2011-0003.htmlPatchThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=612166Issue TrackingPatchThird Party Advisory
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=
- http://lists.opensuse.org/opensuse-security-announce/2010-09/msg00004.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2010-2524?
CVE-2010-2524 is a vulnerability with a CVSS score of 7.8 (HIGH). 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 cif...
How severe is CVE-2010-2524?
CVE-2010-2524 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2010-2524?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Vmware Esx, Canonical Ubuntu Linux, Suse Suse Linux Enterprise Desktop, Suse Suse Linux Enterprise Server.