low
2.1
CWE
310
Advisory Published
Updated

CVE-2006-1056

First published: Thu Apr 20 2006(Updated: )

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.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
FreeBSD Kernel
Linux Kernel<=2.6.16.8
Linux Kernel=2.6.0
Linux Kernel=2.6.0-test1
Linux Kernel=2.6.0-test10
Linux Kernel=2.6.0-test11
Linux Kernel=2.6.0-test2
Linux Kernel=2.6.0-test3
Linux Kernel=2.6.0-test4
Linux Kernel=2.6.0-test5
Linux Kernel=2.6.0-test6
Linux Kernel=2.6.0-test7
Linux Kernel=2.6.0-test8
Linux Kernel=2.6.0-test9
Linux Kernel=2.6.1
Linux Kernel=2.6.1-rc1
Linux Kernel=2.6.1-rc2
Linux Kernel=2.6.1-rc3
Linux Kernel=2.6.2
Linux Kernel=2.6.2-rc1
Linux Kernel=2.6.2-rc2
Linux Kernel=2.6.2-rc3
Linux Kernel=2.6.3
Linux Kernel=2.6.3-rc1
Linux Kernel=2.6.3-rc2
Linux Kernel=2.6.3-rc3
Linux Kernel=2.6.3-rc4
Linux Kernel=2.6.4
Linux Kernel=2.6.4-rc1
Linux Kernel=2.6.4-rc2
Linux Kernel=2.6.4-rc3
Linux Kernel=2.6.5
Linux Kernel=2.6.5-rc1
Linux Kernel=2.6.5-rc2
Linux Kernel=2.6.5-rc3
Linux Kernel=2.6.6
Linux Kernel=2.6.6-rc1
Linux Kernel=2.6.6-rc2
Linux Kernel=2.6.6-rc3
Linux Kernel=2.6.7
Linux Kernel=2.6.7-rc1
Linux Kernel=2.6.7-rc2
Linux Kernel=2.6.7-rc3
Linux Kernel=2.6.8
Linux Kernel=2.6.8-rc1
Linux Kernel=2.6.8-rc2
Linux Kernel=2.6.8-rc3
Linux Kernel=2.6.8-rc4
Linux Kernel=2.6.9
Linux Kernel=2.6.9-2.6.20
Linux Kernel=2.6.9-rc1
Linux Kernel=2.6.9-rc2
Linux Kernel=2.6.9-rc3
Linux Kernel=2.6.9-rc4
Linux Kernel=2.6.10
Linux Kernel=2.6.10-rc1
Linux Kernel=2.6.10-rc2
Linux Kernel=2.6.10-rc3
Linux Kernel=2.6.11
Linux Kernel=2.6.11-rc1
Linux Kernel=2.6.11-rc2
Linux Kernel=2.6.11-rc3
Linux Kernel=2.6.11-rc4
Linux Kernel=2.6.11-rc5
Linux Kernel=2.6.11.1
Linux Kernel=2.6.11.2
Linux Kernel=2.6.11.3
Linux Kernel=2.6.11.4
Linux Kernel=2.6.11.5
Linux Kernel=2.6.11.6
Linux Kernel=2.6.11.7
Linux Kernel=2.6.11.8
Linux Kernel=2.6.11.9
Linux Kernel=2.6.11.10
Linux Kernel=2.6.11.11
Linux Kernel=2.6.11.12
Linux Kernel=2.6.12-rc1
Linux Kernel=2.6.12-rc2
Linux Kernel=2.6.12-rc3
Linux Kernel=2.6.12-rc4
Linux Kernel=2.6.12-rc5
Linux Kernel=2.6.12-rc6
Linux Kernel=2.6.12.1
Linux Kernel=2.6.12.2
Linux Kernel=2.6.12.3
Linux Kernel=2.6.12.4
Linux Kernel=2.6.12.5
Linux Kernel=2.6.12.6
Linux Kernel=2.6.13
Linux Kernel=2.6.13-rc1
Linux Kernel=2.6.13-rc2
Linux Kernel=2.6.13-rc3
Linux Kernel=2.6.13-rc4
Linux Kernel=2.6.13-rc5
Linux Kernel=2.6.13-rc6
Linux Kernel=2.6.13-rc7
Linux Kernel=2.6.13.1
Linux Kernel=2.6.13.2
Linux Kernel=2.6.13.3
Linux Kernel=2.6.13.4
Linux Kernel=2.6.14
Linux Kernel=2.6.14-rc1
Linux Kernel=2.6.14-rc2
Linux Kernel=2.6.14-rc3
Linux Kernel=2.6.14-rc4
Linux Kernel=2.6.14-rc5
Linux Kernel=2.6.14.1
Linux Kernel=2.6.14.2
Linux Kernel=2.6.14.3
Linux Kernel=2.6.14.4
Linux Kernel=2.6.14.5
Linux Kernel=2.6.14.6
Linux Kernel=2.6.14.7
Linux Kernel=2.6.15
Linux Kernel=2.6.15-rc1
Linux Kernel=2.6.15-rc3
Linux Kernel=2.6.15-rc4
Linux Kernel=2.6.15-rc5
Linux Kernel=2.6.15-rc6
Linux Kernel=2.6.15-rc7
Linux Kernel=2.6.15.1
Linux Kernel=2.6.15.2
Linux Kernel=2.6.15.3
Linux Kernel=2.6.15.4
Linux Kernel=2.6.15.5
Linux Kernel=2.6.15.6
Linux Kernel=2.6.15.7
Linux Kernel=2.6.16
Linux Kernel=2.6.16-rc1
Linux Kernel=2.6.16-rc2
Linux Kernel=2.6.16-rc3
Linux Kernel=2.6.16-rc4
Linux Kernel=2.6.16-rc5
Linux Kernel=2.6.16-rc6
Linux Kernel=2.6.16.1
Linux Kernel=2.6.16.2
Linux Kernel=2.6.16.3
Linux Kernel=2.6.16.4
Linux Kernel=2.6.16.5
Linux Kernel=2.6.16.6
Linux Kernel=2.6.16.7
Linux Kernel=2.6.16_rc7
Linux Kernel=2.6_test9_cvs

Remedy

http://secunia.com/advisories/19715

Remedy

http://secunia.com/advisories/19724

Remedy

http://www.securityfocus.com/bid/17600

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2006-1056?

    CVE-2006-1056 has a medium severity rating due to potential information disclosure vulnerabilities in certain Linux and FreeBSD kernels.

  • What are the affected systems for CVE-2006-1056?

    CVE-2006-1056 affects Linux kernels versions prior to 2.6.16.9 and FreeBSD kernels on AMD64 and certain AuthenticAMD processors.

  • How do I fix CVE-2006-1056?

    To fix CVE-2006-1056, upgrade your Linux kernel to version 2.6.16.9 or later or update your FreeBSD system as necessary.

  • What vulnerabilities does CVE-2006-1056 introduce?

    CVE-2006-1056 allows one process to potentially infer the state of another process, leading to information disclosure.

  • When was CVE-2006-1056 reported?

    CVE-2006-1056 was reported in March 2006, highlighting risks related to the saving and restoring of x87 registers.

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