CVE-2023-39193: Linux Kernel Netfilter Xtables Out-Of-Bounds Read Information Disclosure Vulnerability
First published: Wed Jul 26 2023(Updated: )
A flaw was found in the Netfilter subsystem in the Linux kernel. The sctp_mt_check did not validate the flag_count field. This flaw allows a local privileged (CAP_NET_ADMIN) attacker to trigger an out-of-bounds read, leading to a crash or information disclosure.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <6.6 | |
| Redhat Enterprise Linux | =8.0 | |
| Redhat Enterprise Linux | =9.0 | |
| Fedoraproject Fedora | =38 | |
| Linux kernel | ||
| redhat/kernel | <6.6 | 6.6 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.112-1 6.11.5-1 6.11.7-1 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2023-39193
- https://bugzilla.redhat.com/show_bug.cgi?id=2226787
- https://www.zerodayinitiative.com/advisories/ZDI-CAN-18866/
- https://lore.kernel.org/all/20230828221255.124812-1-wander@redhat.com/
- https://www.zerodayinitiative.com/advisories/ZDI-23-1491/
- https://git.kernel.org/linus/e99476497687ef9e850748fe6d232264f30bc8f9 (6.6-rc1)
- https://ubuntu.com/security/notices/USN-6494-1
- https://ubuntu.com/security/notices/USN-6494-2
- https://ubuntu.com/security/notices/USN-6532-1
- https://ubuntu.com/security/notices/USN-6534-1
- https://ubuntu.com/security/notices/USN-6548-1
- https://ubuntu.com/security/notices/USN-6549-1
- https://ubuntu.com/security/notices/USN-6534-2
- https://ubuntu.com/security/notices/USN-6549-2
- https://ubuntu.com/security/notices/USN-6548-2
- https://ubuntu.com/security/notices/USN-6534-3
- https://ubuntu.com/security/notices/USN-6548-3
- https://ubuntu.com/security/notices/USN-6549-3
- https://ubuntu.com/security/notices/USN-6549-4
- https://ubuntu.com/security/notices/USN-6548-4
- https://ubuntu.com/security/notices/USN-6548-5
- https://ubuntu.com/security/notices/USN-6549-5
- https://ubuntu.com/security/notices/USN-6635-1
- https://www.cve.org/CVERecord?id=CVE-2023-39193
- https://nvd.nist.gov/vuln/detail/CVE-2023-39193
- https://launchpad.net/bugs/cve/CVE-2023-39193
- https://security-tracker.debian.org/tracker/CVE-2023-39193
- https://git.kernel.org/linus/2e4e6a17af35be359cc8f1c924f8f198fbd478cc
- https://git.kernel.org/linus/e99476497687ef9e850748fe6d232264f30bc8f9
- https://ubuntu.com/security/CVE-2023-39193
- https://access.redhat.com/errata/RHSA-2024:2394
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://github.com/torvalds/linux/commit/e99476497687ef9e850748fe6d232264f30bc8f9
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2242879
- https://access.redhat.com/errata/RHSA-2024:2950
- https://access.redhat.com/errata/RHSA-2024:3138
Frequently Asked Questions
What is the severity of CVE-2023-39193?
The severity of CVE-2023-39193 is medium.
How can a local attacker exploit CVE-2023-39193?
A local attacker can exploit CVE-2023-39193 by executing high-privileged code on the target system.
What is the affected software for CVE-2023-39193?
The affected software for CVE-2023-39193 includes Linux Kernel, Redhat Enterprise Linux, and Fedora.
What is the remedy for CVE-2023-39193?
The remedy for CVE-2023-39193 is to update the kernel package to version 6.6.
Where can I find more information about CVE-2023-39193?
More information about CVE-2023-39193 can be found at the following references: [Reference 1](https://access.redhat.com/security/cve/CVE-2023-39193), [Reference 2](https://bugzilla.redhat.com/show_bug.cgi?id=2226787), [Reference 3](https://www.zerodayinitiative.com/advisories/ZDI-CAN-18866/).
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