The copy_from_user_mmap_sem function in fs/splice.c in the Linux kernel 2.6.22 through 2.6.24 does not validate a certain userspace pointer before dereference, which allow local users to read from arbitrary kernel memory locations.

A flaw in the vmsplice system call did not properly verify address arguments passed by user-space processes, which allowed local attackers to overwrite arbitrary kernel memory and gain root privileges.

Mandriva urges all users to upgrade to these new kernels immediately as this flaw is being actively exploited. This issue only affects 2.6.17 and newer Linux kernels, so neither Corporate 3.0 nor Corporate 4.0 are affected.

To update your kernel, please follow the directions located at :

http://www.mandriva.com/en/security/kernelupdate

Update to Linux kernel 2.6.23.15:
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.15 Fix vmsplice local root vulnerability: CVE-2008-0009: Fixed by update to 2.6.23.15. CVE-2008-0010: Fixed by update to 2.6.23.15. CVE-2008-0600:
Extra fix from upstream applied. Fix memory leak in netlabel code.
Work around broken Seagate LBA48 disks. (#429364) Fix futex oops on uniprocessor machine. (#429412) Add support for new Macbook touchpads.
(#426574) Fix the initio driver broken in 2.6.23. (#390531) Fix segfaults from using vdso=2. (#427641) FireWire updates, fixing multiple problems. (#429598) ACPI: fix multiple problems with brightness controls (#427518) Fix Megahertz PCMCIA Ethernet adapter (#233255) Fix oops in netfilter. (#430663) ACPI: fix early init of EC (#426480) ALSA: fix audio on some systems with STAC codec (#431360) Atheros L2 fast Ethernet driver (atl2) for ASUS Eeepc. ASUS Eeepc ACPI hotkey driver. Wireless driver updates from upstream.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Update to Linux kernel 2.6.23.15:
http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.23.15 Fix vmsplice local root vulnerability: CVE-2008-0009: Fixed by update to 2.6.23.15. CVE-2008-0010: Fixed by update to 2.6.23.15. CVE-2008-0600:
Extra fix from upstream applied. Fix memory leak in netlabel code (#352281) Autoload the Dell dcdbas driver like in F8 (#326041) Work around broken Seagate LBA48 disks. (F8#429364) Fix futex oops on uniprocessor machine. (F8#429412) Add support for new Macbook touchpads. (F8#426574) Fix the initio driver broken in 2.6.23.
(F8#390531) Fix segfaults from using vdso=2. (F8#427641) FireWire updates, fixing multiple problems. ACPI: fix multiple problems with brightness controls (F8#427518) Wireless driver updates from upstream.

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The vmsplice system call did not properly verify address arguments passed by user space processes, which allowed local attackers to overwrite arbitrary kernel memory, gaining root privileges (CVE-2008-0010, CVE-2008-0600 ).

In the vserver-enabled kernels, a missing access check on certain symlinks in /proc enabled local attackers to access resources in other vservers (CVE-2008-0163 ).

New kernel packages are available for Slackware 12.0, and -current to fix a local root exploit.

ID	Name	Product	Family	Severity
36383	Mandriva Linux Security Advisory : kernel (MDVSA-2008:043)	Nessus	Mandriva Local Security Checks	high
31030	Fedora 8 : kernel-2.6.23.15-137.fc8 (2008-1423)	Nessus	Fedora Local Security Checks	high
31029	Fedora 7 : kernel-2.6.23.15-80.fc7 (2008-1422)	Nessus	Fedora Local Security Checks	high
31028	Debian DSA-1494-2 : linux-2.6 - missing access checks	Nessus	Debian Local Security Checks	high
31027	Slackware 12.0 / current : kernel exploit fix (SSA:2008-042-01)	Nessus	Slackware Local Security Checks	high

Detections

Analytics

CVE-2008-0010

medium

Tenable Plugins

high

high

high

high

high