Embedded malicious code in Linux kernel

1) Embedded malicious code

EUVDB-ID: #VU95660

Risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2003-1161

CWE-ID: CWE-506 - Embedded Malicious Code

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code.

exit.c in Linux kernel 2.6-test9-CVS, as stored on kernel.bkbits.net, was modified to contain a backdoor, which could allow local users to elevate their privileges by passing __WCLONE|__WALL to the sys_wait4 function.

Mitigation

Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

External links

http://www.securityfocus.com/bid/8987
http://www.ussg.iu.edu/hypermail/linux/kernel/0311.0/0621.html
http://www.ussg.iu.edu/hypermail/linux/kernel/0311.0/0627.html
http://www.ussg.iu.edu/hypermail/linux/kernel/0311.0/0630.html

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.