Firewall rules bypass in Linux kernel netfilter
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2022-2663 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Linux kernel Operating systems & Components / Operating system |
| Vendor | Linux Foundation |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Input validation error
EUVDB-ID: #VU67510
Risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2022-2663
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to bypass firewall rules.
The vulnerability exists due to insufficient validation of user-supplied input in nf_conntrack_irc in Linux kernel. A remote attacker can send unencrypted IRC with nf_conntrack_irc configured and bypass configured firewall rules.
Install updates from vendor's website.
Vulnerable software versionsLinux kernel: All versions
External linkshttp://www.openwall.com/lists/oss-security/2022/08/30/1
http://lore.kernel.org/netfilter-devel/20220826045658.100360-1-dgl@dgl.cx/T/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
