Linux Kernel FPU/SSE Environment Restoration MXCSR Register Corruption Vulnerability

BID:7793

Info

Linux Kernel FPU/SSE Environment Restoration MXCSR Register Corruption Vulnerability

Bugtraq ID: 7793
Class: Failure to Handle Exceptional Conditions
CVE: CVE-2003-0248
Remote: No
Local: Yes
Published: Jun 03 2003 12:00AM
Updated: Jul 11 2009 10:06PM
Credit: Discovery of this vulnerability credited to Andrea Arcangeli.
Vulnerable: Redhat Linux 9.0 i386
Redhat Linux 8.0 i686
Redhat Linux 8.0 i386
Redhat Linux 8.0
Redhat Linux 7.3 i686
Redhat Linux 7.3 i386
Redhat Linux 7.3
Redhat Linux 7.2 i686
Redhat Linux 7.2 i586
Redhat Linux 7.2 i386
Redhat Linux 7.2 athlon
Redhat Linux 7.2
Redhat Linux 7.1 i686
Redhat Linux 7.1 i586
Redhat Linux 7.1 i386
Redhat Linux 7.1
Redhat Enterprise Linux WS 2.1
Redhat Enterprise Linux ES 2.1
Redhat Enterprise Linux AS 2.1
Mandriva Linux Mandrake 9.1 ppc
Mandriva Linux Mandrake 9.1
Mandriva Linux Mandrake 9.0
Mandriva Linux Mandrake 8.2 ppc
Mandriva Linux Mandrake 8.2
MandrakeSoft Multi Network Firewall 2.0
MandrakeSoft Corporate Server 2.1
Linux kernel 2.5.69
Linux kernel 2.5.68
Linux kernel 2.5.67
Linux kernel 2.5.66
Linux kernel 2.5.65
Linux kernel 2.5.64
Linux kernel 2.5.63
Linux kernel 2.5.62
Linux kernel 2.5.61
Linux kernel 2.5.60
Linux kernel 2.5.59
Linux kernel 2.5.58
Linux kernel 2.5.57
Linux kernel 2.5.56
Linux kernel 2.5.55
Linux kernel 2.5.54
Linux kernel 2.5.53
Linux kernel 2.5.52
Linux kernel 2.5.51
Linux kernel 2.5.50
Linux kernel 2.5.49
Linux kernel 2.5.48
Linux kernel 2.5.47
Linux kernel 2.5.46
Linux kernel 2.5.45
Linux kernel 2.5.44
Linux kernel 2.5.43
Linux kernel 2.5.42
Linux kernel 2.5.41
Linux kernel 2.5.40
Linux kernel 2.5.39
Linux kernel 2.5.38
Linux kernel 2.5.37
Linux kernel 2.5.36
Linux kernel 2.5.35
Linux kernel 2.5.34
Linux kernel 2.5.33
Linux kernel 2.5.32
Linux kernel 2.5.31
Linux kernel 2.5.30
Linux kernel 2.5.29
Linux kernel 2.5.28
Linux kernel 2.5.27
Linux kernel 2.5.26
Linux kernel 2.5.25
Linux kernel 2.5.24
Linux kernel 2.5.23
Linux kernel 2.5.22
Linux kernel 2.5.21
Linux kernel 2.5.20
Linux kernel 2.5.19
Linux kernel 2.5.18
Linux kernel 2.5.17
Linux kernel 2.5.16
Linux kernel 2.5.15
Linux kernel 2.5.14
Linux kernel 2.5.13
Linux kernel 2.5.12
Linux kernel 2.5.11
Linux kernel 2.5.10
Linux kernel 2.5.9
Linux kernel 2.5.8
Linux kernel 2.5.7
Linux kernel 2.5.6
Linux kernel 2.5.5
Linux kernel 2.5.4
Linux kernel 2.5.3
Linux kernel 2.5.2
Linux kernel 2.5.1
Linux kernel 2.5 .0
Linux kernel 2.4.21 pre4
+ Mandriva Linux Mandrake 9.1 ppc
 + Mandriva Linux Mandrake 9.1
Linux kernel 2.4.21 pre1
Linux kernel 2.4.21
+ Mandriva Linux Mandrake 9.1 ppc
 + Mandriva Linux Mandrake 9.1
+ Redhat Desktop 3.0
+ Redhat Enterprise Linux AS 3
 + Redhat Enterprise Linux ES 3
 + Redhat Enterprise Linux WS 3
 + S.u.S.E. Linux Personal 9.0 x86_64
 + S.u.S.E. Linux Personal 9.0
+ SuSE SUSE Linux Enterprise Server 8
 Linux kernel 2.4.20
Linux kernel 2.4.19 -pre6
Linux kernel 2.4.19 -pre5
Linux kernel 2.4.19 -pre4
Linux kernel 2.4.19 -pre3
Linux kernel 2.4.19 -pre2
Linux kernel 2.4.19 -pre1
Linux kernel 2.4.19
Linux kernel 2.4.18 pre-8
Linux kernel 2.4.18 pre-7
Linux kernel 2.4.18 pre-6
Linux kernel 2.4.18 pre-5
Linux kernel 2.4.18 pre-4
Linux kernel 2.4.18 pre-3
Linux kernel 2.4.18 pre-2
Linux kernel 2.4.18 pre-1
Linux kernel 2.4.18 x86
Linux kernel 2.4.18
Linux kernel 2.4.17
Linux kernel 2.4.16
Linux kernel 2.4.15
Linux kernel 2.4.14
Linux kernel 2.4.13
+ Caldera OpenLinux Server 3.1.1
+ Caldera OpenLinux Workstation 3.1.1
Linux kernel 2.4.12
Linux kernel 2.4.11
Linux kernel 2.4.10
Linux kernel 2.4.9
Linux kernel 2.4.8
Linux kernel 2.4.7
+ Redhat Linux 7.2
+ SuSE Linux 7.2
+ SuSE Linux 7.1
Linux kernel 2.4.6
Linux kernel 2.4.5
+ Slackware Linux 8.0
Linux kernel 2.4.4
Linux kernel 2.4.3
Linux kernel 2.4.2
Linux kernel 2.4.1
Linux kernel 2.4 .0-test9
Linux kernel 2.4 .0-test8
Linux kernel 2.4 .0-test7
Linux kernel 2.4 .0-test6
Linux kernel 2.4 .0-test5
Linux kernel 2.4 .0-test4
Linux kernel 2.4 .0-test3
Linux kernel 2.4 .0-test2
Linux kernel 2.4 .0-test12
Linux kernel 2.4 .0-test11
Linux kernel 2.4 .0-test10
Linux kernel 2.4 .0-test1
Linux kernel 2.4
Linux kernel 2.3.99 -pre7
Linux kernel 2.3.99 -pre6
Linux kernel 2.3.99 -pre5
Linux kernel 2.3.99 -pre4
Linux kernel 2.3.99 -pre3
Linux kernel 2.3.99 -pre2
Linux kernel 2.3.99 -pre1
Linux kernel 2.3.99
Linux kernel 2.3 .x
Linux kernel 2.3
Linux kernel 2.2.25
Linux kernel 2.2.24
Linux kernel 2.2.23
Linux kernel 2.2.22
Linux kernel 2.2.21
Linux kernel 2.2.20
+ Mandriva Linux Mandrake 8.2 ppc
 + Mandriva Linux Mandrake 8.2
Linux kernel 2.2.19
Linux kernel 2.2.18
+ Caldera OpenLinux 2.4
+ Debian Linux 2.2 sparc
 + Debian Linux 2.2 powerpc
 + Debian Linux 2.2 arm
 + Debian Linux 2.2 alpha
 + Debian Linux 2.2 68k
 + Debian Linux 2.2
+ Mandriva Linux Mandrake 7.2
+ Mandriva Linux Mandrake 7.1
+ Mandriva Linux Mandrake 7.0
+ Mandriva Linux Mandrake 6.1
+ Mandriva Linux Mandrake 6.0
+ Redhat Linux 7.0 sparc
 + Redhat Linux 7.0 i386
 + Redhat Linux 7.0 alpha
 + Redhat Linux 6.2 sparc
 + Redhat Linux 6.2 i386
 + Redhat Linux 6.2 alpha
 + Redhat Linux 6.1 sparc
 + Redhat Linux 6.1 i386
 + Redhat Linux 6.1 alpha
 + Redhat Linux 6.0 sparc
 + Redhat Linux 6.0 alpha
 + Redhat Linux 6.0
+ SCO eDesktop 2.4
+ SCO eServer 2.3.1
+ Slackware Linux 7.1
+ Slackware Linux 7.0
+ Slackware Linux 4.0
+ SuSE Linux 7.0
+ SuSE Linux 6.4 ppc
 + SuSE Linux 6.4 alpha
 + SuSE Linux 6.4
+ SuSE Linux 6.3 ppc
 + SuSE Linux 6.3 alpha
 + SuSE Linux 6.3
+ SuSE Linux 6.1 alpha
 + SuSE Linux 6.1
+ SuSE Linux 6.0
+ Wirex Immunix OS 7.0 -Beta
 + Wirex Immunix OS 7.0
+ Wirex Immunix OS 6.2
Linux kernel 2.2.17
+ Mandriva Linux Mandrake 7.2
+ SuSE Linux 7.0
+ Trustix Secure Linux 1.2
Linux kernel 2.2.16 pre6
Linux kernel 2.2.16
Linux kernel 2.2.15 pre20
Linux kernel 2.2.15 pre16
Linux kernel 2.2.15
Linux kernel 2.2.14
+ Redhat Linux 6.2
 + SCO eDesktop 2.4
+ SCO eServer 2.3.1
+ Sun Cobalt RaQ 4
Linux kernel 2.2.13
+ SuSE Linux 6.4
+ SuSE Linux 6.3
Linux kernel 2.2.12
Linux kernel 2.2.11
Linux kernel 2.2.10
Linux kernel 2.2.9
Linux kernel 2.2.8
Linux kernel 2.2.7
Linux kernel 2.2.6
Linux kernel 2.2.5
Linux kernel 2.2.4
Linux kernel 2.2.3
Linux kernel 2.2.2
Linux kernel 2.2.1
Linux kernel 2.2 .x
Linux kernel 2.2
Linux kernel 2.1.89
Linux kernel 2.1 .x
Linux kernel 2.1
Linux kernel 2.0.39
Linux kernel 2.0.38
Linux kernel 2.0.37
Linux kernel 2.0.36
Linux kernel 2.0.35
Linux kernel 2.0.34
Linux kernel 2.0.33
Linux kernel 2.0.32
Linux kernel 2.0.31
Linux kernel 2.0.30
Linux kernel 2.0.29
Linux kernel 2.0.28
Linux kernel 2.0.27
Linux kernel 2.0.26
Linux kernel 2.0.25
Linux kernel 2.0.24
Linux kernel 2.0.23
Linux kernel 2.0.22
Linux kernel 2.0.21
Linux kernel 2.0.20
Linux kernel 2.0.19
Linux kernel 2.0.18
Linux kernel 2.0.17
Linux kernel 2.0.16
Linux kernel 2.0.15
Linux kernel 2.0.14
Linux kernel 2.0.13
Linux kernel 2.0.12
Linux kernel 2.0.11
Linux kernel 2.0.10
Linux kernel 2.0.9
Linux kernel 2.0.8
Linux kernel 2.0.7
Linux kernel 2.0.6
Linux kernel 2.0.5
Linux kernel 2.0.4
Linux kernel 2.0.3
Linux kernel 2.0.2
Linux kernel 2.0.1
Linux kernel 2.0 .x
Linux kernel 2.0
Leif M. Wright simplestmail.cgi 2.2.18
Leif M. Wright simplestmail.cgi 2.0.22
Not Vulnerable: Linux kernel 2.4.22
+ Devil-Linux Devil-Linux 1.0.5
+ Devil-Linux Devil-Linux 1.0.4
+ Mandriva Linux Mandrake 9.2 amd64
 + Mandriva Linux Mandrake 9.2
+ Redhat Fedora Core1
 + Slackware Linux 9.1

Discussion

Linux Kernel FPU/SSE Environment Restoration MXCSR Register Corruption Vulnerability

The Linux Kernel FPU/SSE environment restoration code has been reported prone to a vulnerability that could lead to a local denial of service.

When the kernel is attempting to restore FPU/SSE state information previously stored using the FXSAVE instruction, an exceptional condition may occur that could cause the contents of the MXCSR register to be corrupted. This could potentially cause a reserved bit within the register to be unexpectedly set, effectively triggering a general protection fault to occur within the kernel, causing it to crash.

Successful exploitation of this issue could potentially allow an unprivileged attacker to crash an affected system.

Exploit / POC

Linux Kernel FPU/SSE Environment Restoration MXCSR Register Corruption Vulnerability

Symantec has confirmed that this issue is exploitable.

Solution / Fix

Linux Kernel FPU/SSE Environment Restoration MXCSR Register Corruption Vulnerability

Solution:
Mandrake Linux have released a security advisory (MDKSA-2003:074) to address this issue. Further details regarding downloading and applying these fixes can be found in the referenced advisory. Fixes are linked below.

Mandrake has issued a kernel upgrade that is patched. Please see the advisory linked to in the reference section (MDKSA-2003:066-1) for further information.

Red Hat Linux has released an advisory RHSA-2003:187-01. Information about obtaining and applying fixes can be found in the referenced advisory.

Debian has issued a kernel upgrade that is patched. Please see the advisories linked to in the reference section (DSA-311-1 and DSA 312-1) for URLs to fixes.

Red Hat Linux has released a new advisory RHSA-2003:195-06. Fixes are available through the Red Hat Network. Affected users are advised to upgrade.

Debian has released a new advisory, DSA 332-1. Information about obtaining and applying fixes can be found in the referenced advisory.

Debian has announced in DSA 336-2 that advisory DSA 336-1 does not address this issue.

Guardian Digital has released advisory ESA-20032407-018 to address this issue. See referenced advisory for additional information.

Conectiva has released advisory CLA-2003:701 to address this issue. See referenced advisory for additional details and fix information.

This issue was officially addressed in the release of the Linux 2.4.22 kernel.

Conectiva has released a security advisory (CLA-2003:796) containing fixes to address this issue in Conectiva Linux 8.

Debian has released DSA 442-1 to provide fixes for s390 platforms. Please see the attached advisory for further information.

Fixes:


MandrakeSoft Corporate Server 2.1

Linux kernel 2.4

Linux kernel 2.4.1

Linux kernel 2.4.11

Linux kernel 2.4.12

Linux kernel 2.4.13

Linux kernel 2.4.15

Linux kernel 2.4.17

Linux kernel 2.4.21

Linux kernel 2.4.21 pre1

Linux kernel 2.4.21 pre4

Linux kernel 2.4.5

Linux kernel 2.4.6

Linux kernel 2.4.7

Mandriva Linux Mandrake 9.1

References

Linux Kernel FPU/SSE Environment Restoration MXCSR Register Corruption Vulnerability

References:

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