CVE-2022-2663
First published: Tue Aug 30 2022(Updated: )
A firewall flaw that can bypass the Linux kernel’s Netfilter functionality was found in how a user handles unencrypted IRC with nf_conntrack_irc configured. This flaw allows a remote user to gain unauthorized access to the system.
Credit: secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel-rt | <0:4.18.0-477.10.1.rt7.274.el8_8 | 0:4.18.0-477.10.1.rt7.274.el8_8 |
| redhat/kernel | <0:4.18.0-477.10.1.el8_8 | 0:4.18.0-477.10.1.el8_8 |
| redhat/kernel | <0:5.14.0-284.11.1.el9_2 | 0:5.14.0-284.11.1.el9_2 |
| redhat/kernel-rt | <0:5.14.0-284.11.1.rt14.296.el9_2 | 0:5.14.0-284.11.1.rt14.296.el9_2 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.119-1 6.12.9-1 6.12.10-1 | |
| Linux Kernel | ||
| Debian Debian Linux | =10.0 | |
| Debian Debian Linux | =11.0 |
Remedy
To mitigate this issue, prevent the module nf_conntrack_irc from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2022-2663 https://nvd.nist.gov/vuln/detail/CVE-2022-2663 https://lore.kernel.org/netfilter-devel/20220826045658.100360-1-dgl@dgl.cx/T/
- https://bugzilla.redhat.com/show_bug.cgi?id=2123056
- https://access.redhat.com/errata/RHSA-2023:2736
- https://access.redhat.com/errata/RHSA-2023:2951
- https://access.redhat.com/errata/RHSA-2023:2458
- https://access.redhat.com/errata/RHSA-2023:2148
- https://access.redhat.com/security/cve/cve-2022-2663
- https://dgl.cx/2022/08/nat-again-irc-cve-2022-2663
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
- https://lore.kernel.org/netfilter-devel/20220826045658.100360-1-dgl%40dgl.cx/T/
- https://www.debian.org/security/2022/dsa-5257
- https://www.openwall.com/lists/oss-security/2022/08/30/1
- https://www.youtube.com/watch?v=WIq-YgQuYCA
- https://launchpad.net/bugs/cve/CVE-2022-2663
- https://lore.kernel.org/netfilter-devel/20220826045658.100360-1-dgl@dgl.cx/T/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2123057
- https://access.redhat.com/errata/RHSA-2024:0724
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-2663
- https://nvd.nist.gov/vuln/detail/CVE-2022-2663
- https://security-tracker.debian.org/tracker/CVE-2022-2663
- https://ubuntu.com/security/CVE-2022-2663
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is the severity of CVE-2022-2663?
CVE-2022-2663 is considered a high severity vulnerability due to its potential to allow unauthorized access to a system.
How do I fix CVE-2022-2663?
To resolve CVE-2022-2663, update to the latest kernel version provided by your distribution, specifically the patched versions for Red Hat or Debian.
What systems are affected by CVE-2022-2663?
CVE-2022-2663 affects multiple versions of the Linux kernel, particularly those in Red Hat and Debian distributions.
What is the impact of CVE-2022-2663?
The impact of CVE-2022-2663 includes the potential for an attacker to bypass firewall protections and gain unauthorized access to the system.
Is CVE-2022-2663 exploitable remotely?
Yes, CVE-2022-2663 is exploitable remotely, allowing unauthorized users to potentially compromise affected systems.
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