Risk | Low |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-42008 |
CWE-ID | CWE-787 |
Exploitation vector | Local |
Public exploit | Public exploit code for vulnerability #1 is available. |
Vulnerable software Subscribe |
Linux kernel Operating systems & Components / Operating system |
Vendor | Linux Foundation |
Security Bulletin
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU63669
Risk: Low
CVSSv3.1: 6 [CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID: CVE-2021-42008
CWE-ID:
CWE-787 - Out-of-bounds write
Exploit availability: Yes
DescriptionThe vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in the decode_data() function in drivers/net/hamradio/6pack.c in the Linux kernel. A local user can send input from a process that has the CAP_NET_ADMIN capability and escalate privileges on the system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsLinux kernel: 5.13 rc1 - 5.13.14
External linkshttp://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19d1532a187669ce86d5a2696eb7275310070793
http://www.youtube.com/watch?v=d5f9xLK8Vhw
http://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.13
http://security.netapp.com/advisory/ntap-20211104-0002/
http://lists.debian.org/debian-lts-announce/2021/12/msg00012.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. However, proof of concept for this vulnerability is available.