Incorrect default permissions in Linux kernel

1) Incorrect default permissions

EUVDB-ID: #VU94813

Risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2003-1040

CWE-ID: CWE-276 - Incorrect Default Permissions

Exploit availability: No

Description

The vulnerability allows a local user to perform service disruption.

kmod in the Linux kernel does not set its uid, suid, gid, or sgid to 0, which allows local users to cause a denial of service (crash) by sending certain signals to kmod.

Mitigation

Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

External links

http:ftp://patches.sgi.com/support/free/security/advisories/20040204-01-U.asc
http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000820
http://linux.bkbits.net:8080/linux-2.4/diffs/kernel/kmod.c@1.6?nav=index.html|src/|src/kernel|hist/kernel/kmod.c
http://www.novell.com/linux/security/advisories/2003_049_kernel.html
http://www.redhat.com/support/errata/RHSA-2004-065.html
http://www.redhat.com/support/errata/RHSA-2004-069.html
http://www.redhat.com/support/errata/RHSA-2004-106.html
http://www.redhat.com/support/errata/RHSA-2004-188.html
http://exchange.xforce.ibmcloud.com/vulnerabilities/15577
http://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A9423

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.