CVE-2023-3338: Crash due to a null pointer dereference in the dn_nsp_send function
First published: Mon Jun 26 2023(Updated: )
A flaw in the Linux Kernel found. While attempting to ping localhost by sending a Hello message to a local DECnet socket, Null Pointer Dereference happens in the dn_nsp_send function (net/decnet/dn_nsp_out.c). The bug happens only for systems where legacy code enabled (Kernel config param CONFIG_DECNET), because the DECnet subsystem has been officially removed from all longterm and stable kernel series, starting from 4.14.319, 4.19.287, 5.4.248, 5.10.185 and 5.15.118. Reference: <a href="https://seclists.org/oss-sec/2023/q2/276">https://seclists.org/oss-sec/2023/q2/276</a>
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.5 | 6.5 |
| Linux Kernel | =6.5-rc1 | |
| Linux Kernel | <6.5 | |
| netapp active iq unified manager vsphere | ||
| Debian GNU/Linux | =10.0 | |
| Debian GNU/Linux | =11.0 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.13-1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2023-3338 https://nvd.nist.gov/vuln/detail/CVE-2023-3338
- https://bugzilla.redhat.com/show_bug.cgi?id=2218618
- https://access.redhat.com/security/cve/cve-2023-3338
- https://access.redhat.com/security/cve/CVE-2023-3338
- https://lists.debian.org/debian-lts-announce/2023/07/msg00030.html
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- https://seclists.org/oss-sec/2023/q2/276
- https://security.netapp.com/advisory/ntap-20230824-0005/
- https://www.debian.org/security/2023/dsa-5480
- https://launchpad.net/bugs/cve/CVE-2023-3338
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2218619
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2217451
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-3338
- https://nvd.nist.gov/vuln/detail/CVE-2023-3338
- https://security-tracker.debian.org/tracker/CVE-2023-3338
- https://ubuntu.com/security/CVE-2023-3338
- https://www.openwall.com/lists/oss-security/2023/06/24/3
- https://git.kernel.org/linus/1202cdd665315c525b5237e96e0bedc76d7e754f
Frequently Asked Questions
What is the severity of CVE-2023-3338?
CVE-2023-3338 is classified as a high-severity vulnerability due to its potential impact on systems with legacy DECnet protocols enabled.
How do I fix CVE-2023-3338?
To mitigate CVE-2023-3338, update the Linux kernel to version 6.5 or any of the specified remedied versions for Debian systems.
Who is affected by CVE-2023-3338?
CVE-2023-3338 affects systems running specific versions of the Linux kernel, particularly those with DECnet legacy code enabled.
What systems are at risk from CVE-2023-3338?
Systems at risk from CVE-2023-3338 include those using Red Hat and Debian distributions with kernel versions prior to 6.5.
What type of issue is CVE-2023-3338?
CVE-2023-3338 is a null pointer dereference vulnerability occurring in the dn_nsp_send function of the Linux kernel.
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