Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2006-1056

Severity CVSS v4.0:
Pending analysis
Type:
CWE-310 Cryptographic Issues
Publication date:
20/04/2006
Last modified:
03/04/2025

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.

Impact

Vector 2.0
AV:L/AC:L/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 2.10 LOW
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0
2.10
Severity 2.0
LOW

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:freebsd:freebsd:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 2.6.16.8 (including)
cpe:2.3:o:linux:linux_kernel:2.6.0:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test10:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test11:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test8:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.0:test9:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:2.6.1:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools