CVE-2023-42752: Kernel: integer overflow in igmpv3_newpack leading to exploitable memory access
First published: Mon Sep 18 2023(Updated: )
An integer overflow flaw was found in the Linux kernel. This issue leads to the kernel allocating `skb_shared_info` in the userspace, which is exploitable in systems without SMAP protection since `skb_shared_info` contains references to function pointers.
Credit: secalert@redhat.com secalert@redhat.com secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/Kernel | <6.6 | 6.6 |
| Linux Kernel | <=6.5.7 | |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.135-1 6.12.22-1 6.12.25-1 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2023-42752
- https://bugzilla.redhat.com/show_bug.cgi?id=2239828
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=915d975b2ffa
- https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=c3b704d4a4a2
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
- https://launchpad.net/bugs/cve/CVE-2023-42752
- https://seclists.org/oss-sec/2023/q3/192
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-42752
- https://nvd.nist.gov/vuln/detail/CVE-2023-42752
- https://security-tracker.debian.org/tracker/CVE-2023-42752
- https://ubuntu.com/security/CVE-2023-42752
- https://www.openwall.com/lists/oss-security/2023/09/18/3
- https://git.kernel.org/linus/915d975b2ffa58a14bfcf16fafe00c41315949ff
- https://git.kernel.org/linus/c3b704d4a4a265660e665df51b129e8425216ed1
Frequently Asked Questions
What is the severity of CVE-2023-42752?
CVE-2023-42752 is rated as a high-severity vulnerability due to the potential for exploitation leading to critical system compromise.
How do I fix CVE-2023-42752?
To resolve CVE-2023-42752, upgrade to the recommended kernel versions, including 6.6 for Red Hat or apply the specific patches listed in your distribution's advisory.
What systems are affected by CVE-2023-42752?
CVE-2023-42752 affects Linux Kernel versions up to 6.5.7 and notable Red Hat and Debian kernel versions listed in their security alerts.
Can CVE-2023-42752 be exploited without SMAP protection?
Yes, CVE-2023-42752 can be exploited in systems without SMAP protection, leading to potential user space issues.
What type of flaw is CVE-2023-42752?
CVE-2023-42752 is an integer overflow flaw that results in inadequate kernel memory management, allowing for possible code execution attacks.
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