CVE-2023-42753 Kernel: netfilter: potential slab-out-of-bound access due to integer underflow
High 7.0
Published
Updated
Check this codebase for CVE-2023-42753 and fix it if it is affected.
What it is: CVE-2023-42753 is a high-severity vulnerability in Debian Debian Linux, published on 25 Sep 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-42753 exists.
Affected product: Debian Debian Linux. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2023-42753/ (Markdown: https://insights.sbomify.com/CVE-2023-42753/index.md)
A local attacker can exploit an integer underflow in the Linux kernel netfilter subsystem to cause a system crash or escalate privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-42753?
CVE-2023-42753 is a high-severity vulnerability in Debian Debian Linux, published on 25 Sep 2023. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An array indexing vulnerability was found in the netfilter subsystem of the Linux kernel. A missing macro could lead to a miscalculation of the `h->nets` array offset, providing attackers with the primitive to arbitrarily increment/decrement a memory buffer out-of-bound. This issue may allow a local user to crash the system or potentially escalate their privileges on the system.
Weakness: CWE-787
Which versions are affected by CVE-2023-42753?
It affects 3 products.
Linux distribution packages (40)
bpftool Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
bpftool-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
kernel Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-abi-whitelists Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debug Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debug-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debug-devel Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debuginfo-common-x86_64 Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-devel Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-doc Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-tools Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-tools-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-tools-libs Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-tools-libs-devel Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
perf Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
perf-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
python-perf Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
python-perf-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:3.10.0-1160.108.1.el7 |
bpftool-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debug-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debuginfo-common-x86_64 Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-tools-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-tools-libs-devel Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.108.1.el7 |
perf-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.108.1.el7 |
python-perf-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:3.10.0-1160.108.1.el7 |
bpftool Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.108.1.el7 |
bpftool-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.108.1.el7 |
kernel Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-abi-whitelists Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-bootwrapper Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debug Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debug-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debug-devel Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debuginfo-common-ppc64 Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debuginfo-common-ppc64le Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debuginfo-common-s390x Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.108.1.el7 |
kernel-debuginfo-common-x86_64 Red Hat:enterprise_linux:7::server | All versions | 0:3.10.0-1160.108.1.el7 |
Products include Debian Debian Linux, Linux kernel, Redhat Enterprise Linux.
How do I fix CVE-2023-42753?
Apply the vendor's patch.
Is CVE-2023-42753 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-42753 exists.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as AZL-30050, AZL-30054, BELL-CVE-2023-42753, DEBIAN-CVE-2023-42753, GHSA-j66v-q82h-4f8h, OESA-2023-1729 and 6 more.