CVE-2006-1056
What it is
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.
At a glance
- Exploitability
- Can be exploited locally on the machine without logging in. Limited direct impact.
- Exploit odds
- 0.5% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.5% in the next 30 days (EPSS).
- Severity: 2.1 LOW (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.5% · EPSS, next 30 days
- Weakness
- CWE-310
- Record status
- Modified
Affected
- Freebsd
- Linux Kernel ≤ 2.6.16.8
- Linux Kernel 2.6.0
- Linux Kernel 2.6.1
- Linux Kernel 2.6.2
- Linux Kernel 2.6.3
- Linux Kernel 2.6.4
- Linux Kernel 2.6.5
Attack profile CVSS 2.0 · 2.1
- Attack vector
- Local
- Complexity
- Low
- Authentication
- None
- Confidentiality
- Partial
- Integrity
- None
- Availability
- None
Raw vector
AV:L/AC:L/Au:N/C:P/I:N/A:N
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2006-1056.md and follow it. Check whether this project is affected by CVE-2006-1056. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- http://secunia.com/advisories/19715
- http://secunia.com/advisories/19724
- http://secunia.com/advisories/19735
- http://secunia.com/advisories/20398
- http://secunia.com/advisories/20671
- http://secunia.com/advisories/20716
- http://secunia.com/advisories/20914
- http://secunia.com/advisories/21035
- http://secunia.com/advisories/21136
- http://secunia.com/advisories/21465
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/19715
- http://secunia.com/advisories/19724
- http://secunia.com/advisories/19735
- http://secunia.com/advisories/20398
- http://secunia.com/advisories/20671
- http://secunia.com/advisories/20716
- http://secunia.com/advisories/20914
- http://secunia.com/advisories/21035
- http://secunia.com/advisories/21136
- http://secunia.com/advisories/21465
- http://secunia.com/advisories/21983
- http://secunia.com/advisories/22417
- http://secunia.com/advisories/22875
- http://secunia.com/advisories/22876
- http://security.freebsd.org/advisories/FreeBSD-SA-06:14-amd.txt
- http://securitytracker.com/id?1015966
- http://support.avaya.com/elmodocs2/security/ASA-2006-180.htm
- http://support.avaya.com/elmodocs2/security/ASA-2006-200.htm
- http://www.debian.org/security/2006/dsa-1097