Title: Linux kernel do_fork() Memory Leakage Vulnerability

Severity: MODERATE

Description:

The Linux kernel has been reported prone to an unspecified memory-leakage vulnerability that may allow an attacker to access sensitive kernel memory.

Reportedly, the issue resides in the do_fork() routine. The issue presents itself if an error occurs after the mm_struct structure for a child process has been allocated. Memory is never freed because the exit_mm() function increments the mm_count, but fails to decrement it. Presumably, this issue may not be exploitable or may not pose a greater risk, but this has not been confirmed.

Exploiting this issue may allow an attacker to cause a kernel panic that may result in a denial-of-service condition.

This issue has been identified in kernel versions 2.4 and 2.6.

Affected Products:

Astaro Security Linux 2.0.0 16
Astaro Security Linux 2.0.0 23
Avaya Converged Communications Server 2.0.0
Avaya Intuity LX
Avaya S3400 Message Application Server
Avaya S8300 R2.0.0
Avaya S8300 R2.0.1
Avaya S8500 R2.0.0
Avaya S8500 R2.0.1
Avaya S8700 R2.0.0
Avaya S8700 R2.0.1
CRUX CRUX Linux 1.0.0
Caldera OpenLinux Server 3.1.0
Caldera OpenLinux Server 3.1.1
Caldera OpenLinux Workstation 3.1.0
Caldera OpenLinux Workstation 3.1.1
Conectiva Linux 7.0.0
Conectiva Linux 8.0.0
Conectiva Linux 9.0.0
Conectiva Linux Enterprise Edition 1.0.0
Debian Linux 3.0.0
Debian Linux 3.0.0 alpha
Debian Linux 3.0.0 arm
Debian Linux 3.0.0 hppa
Debian Linux 3.0.0 ia-32
Debian Linux 3.0.0 ia-64
Debian Linux 3.0.0 m68k
Debian Linux 3.0.0 mips
Debian Linux 3.0.0 mipsel
Debian Linux 3.0.0 ppc
Debian Linux 3.0.0 s/390
Debian Linux 3.0.0 sparc
Devil-Linux Devil-Linux 1.0.4
Devil-Linux Devil-Linux 1.0.5
Gentoo Linux 1.2.0
Gentoo Linux 1.4.0
Linux kernel 2.4.0
Linux kernel 2.4.0 .0-test1
Linux kernel 2.4.0 .0-test10
Linux kernel 2.4.0 .0-test11
Linux kernel 2.4.0 .0-test12
Linux kernel 2.4.0 .0-test2
Linux kernel 2.4.0 .0-test3
Linux kernel 2.4.0 .0-test4
Linux kernel 2.4.0 .0-test5
Linux kernel 2.4.0 .0-test6
Linux kernel 2.4.0 .0-test7
Linux kernel 2.4.0 .0-test8
Linux kernel 2.4.0 .0-test9
Linux kernel 2.4.1
Linux kernel 2.4.10
Linux kernel 2.4.11
Linux kernel 2.4.12
Linux kernel 2.4.13
Linux kernel 2.4.14
Linux kernel 2.4.15
Linux kernel 2.4.16
Linux kernel 2.4.17
Linux kernel 2.4.18
Linux kernel 2.4.18 pre-1
Linux kernel 2.4.18 pre-2
Linux kernel 2.4.18 pre-3
Linux kernel 2.4.18 pre-4
Linux kernel 2.4.18 pre-5
Linux kernel 2.4.18 pre-6
Linux kernel 2.4.18 pre-7
Linux kernel 2.4.18 pre-8
Linux kernel 2.4.18 x86
Linux kernel 2.4.19
Linux kernel 2.4.19 -pre1
Linux kernel 2.4.19 -pre2
Linux kernel 2.4.19 -pre3
Linux kernel 2.4.19 -pre4
Linux kernel 2.4.19 -pre5
Linux kernel 2.4.19 -pre6
Linux kernel 2.4.2
Linux kernel 2.4.20
Linux kernel 2.4.21
Linux kernel 2.4.21 pre1
Linux kernel 2.4.21 pre4
Linux kernel 2.4.21 pre7
Linux kernel 2.4.22
Linux kernel 2.4.23
Linux kernel 2.4.23 -ow2
Linux kernel 2.4.23 -pre9
Linux kernel 2.4.24
Linux kernel 2.4.24 -ow1
Linux kernel 2.4.25
Linux kernel 2.4.26
Linux kernel 2.4.3
Linux kernel 2.4.4
Linux kernel 2.4.5
Linux kernel 2.4.6
Linux kernel 2.4.7
Linux kernel 2.4.8
Linux kernel 2.4.9
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 2.6.0 -test9-CVS
Linux kernel 2.6.1
Linux kernel 2.6.1 -rc1
Linux kernel 2.6.1 -rc2
Linux kernel 2.6.2
Linux kernel 2.6.3
Linux kernel 2.6.4
Linux kernel 2.6.5
MandrakeSoft Corporate Server 2.1.0
MandrakeSoft Corporate Server 2.1.0 x86_64
MandrakeSoft Linux Mandrake 8.0.0
MandrakeSoft Linux Mandrake 8.0.0 ppc
MandrakeSoft Linux Mandrake 8.1.0
MandrakeSoft Linux Mandrake 8.2.0
MandrakeSoft Linux Mandrake 9.0.0
MandrakeSoft Linux Mandrake 9.1.0
MandrakeSoft Linux Mandrake 9.1.0 ppc
MandrakeSoft Linux Mandrake 9.2.0
MandrakeSoft Linux Mandrake 9.2.0 amd64
MandrakeSoft Multi Network Firewall 2.0.0
Microsoft Windows 2000 Server
RedHat Advanced Workstation for the Itanium Processor 2.1.0
RedHat Advanced Workstation for the Itanium Processor 2.1.0 IA64
RedHat Desktop 3.0.0
RedHat Enterprise Linux AS 2.1
RedHat Enterprise Linux AS 2.1 IA64
RedHat Enterprise Linux AS 3
RedHat Enterprise Linux ES 2.1
RedHat Enterprise Linux ES 2.1 IA64
RedHat Enterprise Linux ES 3
RedHat Enterprise Linux WS 2.1
RedHat Enterprise Linux WS 2.1 IA64
RedHat Enterprise Linux WS 3
RedHat Fedora Core1
RedHat Linux 7.1.0
RedHat Linux 7.1.0 alpha
RedHat Linux 7.1.0 i386
RedHat Linux 7.1.0 ia64
RedHat Linux 7.2.0
RedHat Linux 7.2.0 alpha
RedHat Linux 7.2.0 i386
RedHat Linux 7.2.0 ia64
RedHat Linux 7.3.0
RedHat Linux 8.0.0
RedHat Linux 9.0.0 i386
S.u.S.E. Linux 7.1.0
S.u.S.E. Linux 7.2.0
S.u.S.E. Linux 7.3.0
S.u.S.E. Linux 8.0.0
S.u.S.E. Linux 8.1.0
S.u.S.E. Linux Connectivity Server
S.u.S.E. Linux Database Server
S.u.S.E. Linux Enterprise Server 7
S.u.S.E. Linux Enterprise Server 8
S.u.S.E. Linux Enterprise Server 9
S.u.S.E. Linux Firewall on CD
S.u.S.E. Linux Office Server
S.u.S.E. Linux Openexchange Server
S.u.S.E. Linux Personal 8.2.0
S.u.S.E. Linux Personal 9.0.0
S.u.S.E. Linux Personal 9.0.0 x86_64
S.u.S.E. Linux Personal 9.1.0
S.u.S.E. Linux Personal 9.1.0 x86_64
S.u.S.E. SuSE eMail Server 3.1.0
S.u.S.E. SuSE eMail Server III
SGI ProPack 2.4.0
SGI ProPack 3.0.0
Slackware Linux -current
Slackware Linux 8.0.0
Slackware Linux 9.0.0
Slackware Linux 9.1.0
Sun Cobalt RaQ 550
Sun Linux 5.0.0
Sun Linux 5.0.3
Sun Linux 5.0.5
Trustix Secure Linux 2.0.0
Turbolinux Appliance Server Hosting Edition 1.0.0
Turbolinux Appliance Server Workgroup Edition 1.0.0
Turbolinux Turbolinux Desktop 10.0.0
Turbolinux Turbolinux Server 7.0.0
Turbolinux Turbolinux Server 8.0.0
Turbolinux Turbolinux Workstation 7.0.0
Turbolinux Turbolinux Workstation 8.0.0
WOLK WOLK 4.4.0 s

References:

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J-Security Center

Title: Linux kernel do_fork() Memory Leakage Vulnerability

Severity: MODERATE

Description:

Affected Products:

References: