Vulnerability Description
The Linux kernel before 2.6.16.9 and the FreeBSD kernel, when running on AMD64 and other 7th and 8th generation AuthenticAMD processors, only save/restore the FOP, FIP, and FDP x87 registers in FXSAVE/FXRSTOR when an exception is pending, which allows one process to determine portions of the state of floating point instructions of other processes, which can be leveraged to obtain sensitive information such as cryptographic keys. NOTE: this is the documented behavior of AMD64 processors, but it is inconsistent with Intel processors in a security-relevant fashion that was not addressed by the kernels.
CVSS Score
LOW
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Freebsd | Freebsd | All versions |
| Linux | Linux Kernel | <= 2.6.16.8 |
Related Weaknesses (CWE)
References
- ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:14.fpu.asc
- http://kb.vmware.com/kb/2533126
- http://kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.16.9
- http://lists.opensuse.org/opensuse-security-announce/2014-03/msg00021.html
- http://lwn.net/Alerts/180820/
- http://marc.info/?l=linux-kernel&m=114548768214478&w=2
- http://secunia.com/advisories/19715PatchVendor Advisory
- http://secunia.com/advisories/19724PatchVendor Advisory
- http://secunia.com/advisories/19735Vendor Advisory
- http://secunia.com/advisories/20398Vendor Advisory
- http://secunia.com/advisories/20671Vendor Advisory
- http://secunia.com/advisories/20716Vendor Advisory
- http://secunia.com/advisories/20914Vendor Advisory
- http://secunia.com/advisories/21035Vendor Advisory
- http://secunia.com/advisories/21136Vendor Advisory
FAQ
What is CVE-2006-1056?
CVE-2006-1056 is a vulnerability with a CVSS score of 2.1 (LOW). The Linux kernel before 2.6.16.9 and the FreeBSD kernel, when running on AMD64 and other 7th and 8th generation AuthenticAMD processors, only save/restore the FOP, FIP, and FDP x87 registers in FXSAVE...
How severe is CVE-2006-1056?
CVE-2006-1056 has been rated LOW with a CVSS base score of 2.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2006-1056?
Check the references section above for vendor advisories and patch information. Affected products include: Freebsd Freebsd, Linux Linux Kernel.