Vulnerability identifier: #VU92845

Vulnerability risk: Low

CVSSv3.1: 4 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C]

CVE-ID: CVE-2009-0835

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: Yes

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to read and manipulate data.

The __secure_computing function in kernel/seccomp.c in the seccomp subsystem in the Linux kernel 2.6.28.7 and earlier on the x86_64 platform, when CONFIG_SECCOMP is enabled, does not properly handle (1) a 32-bit process making a 64-bit syscall or (2) a 64-bit process making a 32-bit syscall, which allows local users to bypass intended access restrictions via crafted syscalls that are misinterpreted as (a) stat or (b) chmod, a related issue to CVE-2009-0342 and CVE-2009-0343.

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel:

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External links
http://lists.opensuse.org/opensuse-security-announce/2009-04/msg00007.html
http://lists.opensuse.org/opensuse-security-announce/2009-05/msg00002.html
http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00000.html
http://lists.opensuse.org/opensuse-security-announce/2009-06/msg00001.html
http://lkml.org/lkml/2009/2/28/23
http://marc.info/?l=linux-kernel&m=123579056530191&w=2
http://marc.info/?l=linux-kernel&m=123579069630311&w=2
http://marc.info/?l=oss-security&m=123597627132485&w=2
http://scary.beasts.org/security/CESA-2009-001.html
http://scary.beasts.org/security/CESA-2009-004.html
http://scarybeastsecurity.blogspot.com/2009/02/linux-kernel-minor-seccomp.html
http://secunia.com/advisories/34084
http://secunia.com/advisories/34786
http://secunia.com/advisories/34917
http://secunia.com/advisories/35121
http://secunia.com/advisories/35185
http://secunia.com/advisories/35390
http://secunia.com/advisories/35394
http://www.debian.org/security/2009/dsa-1800
http://www.mandriva.com/security/advisories?name=MDVSA-2009:118
http://www.redhat.com/support/errata/RHSA-2009-0451.html
http://www.securityfocus.com/bid/33948
http://www.ubuntu.com/usn/usn-751-1
http://bugzilla.redhat.com/show_bug.cgi?id=487255

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability. However, proof of concept for this vulnerability is available.