ALBA-2021:4897 kronosnet bug fix update
Not scored
Published
Check this codebase for ALBA-2021:4897 and fix it if it is affected.
What it is: ALBA-2021:4897 is a denial of service vulnerability in libknet1, published on 1 Dec 2021.
Exploitation: There is no known exploitation of ALBA-2021:4897 in the wild and no public exploit code.
Affected product: libknet1. 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/ALBA-2021-4897/ (Markdown: https://insights.sbomify.com/ALBA-2021-4897/index.md)
Instability in Kronosnet defrag buffer handling could lead to denial of service, requiring a patch update.
- Exploited in the wild
- Not known
- Login needed
- Not stated
- Attackable
- Not stated
- Victim action needed
- Not stated
- Fix
- Available
What is ALBA-2021:4897?
ALBA-2021:4897 is a denial of service vulnerability in libknet1, published on 1 Dec 2021.
Official description
Kronosnet (knet) is a network abstraction layer designed for High Availability use cases.
Bug Fix(es) and Enhancement(s):
- Revert defrag buffer changes that could potentially cause instability. (BZ#2023847)
Which versions are affected by ALBA-2021:4897?
Linux distribution packages (13)
libknet1 AlmaLinux:8 | All versions | 1.18-4.el8_5 |
libknet1-compress-bzip2-plugin AlmaLinux:8 | All versions | 1.18-4.el8_5 |
libknet1-compress-lz4-plugin AlmaLinux:8 | All versions | 1.18-4.el8_5 |
libknet1-compress-lzma-plugin AlmaLinux:8 | All versions | 1.18-4.el8_5 |
libknet1-compress-lzo2-plugin AlmaLinux:8 | All versions | 1.18-4.el8_5 |
libknet1-compress-plugins-all AlmaLinux:8 | All versions | 1.18-4.el8_5 |
libknet1-compress-zlib-plugin AlmaLinux:8 | All versions | 1.18-4.el8_5 |
libknet1-crypto-nss-plugin AlmaLinux:8 | All versions | 1.18-4.el8_5 |
libknet1-crypto-openssl-plugin AlmaLinux:8 | All versions | 1.18-4.el8_5 |
libknet1-crypto-plugins-all AlmaLinux:8 | All versions | 1.18-4.el8_5 |
libknet1-devel AlmaLinux:8 | All versions | 1.18-4.el8_5 |
libknet1-plugins-all AlmaLinux:8 | All versions | 1.18-4.el8_5 |
libnozzle1 AlmaLinux:8 | All versions | 1.18-4.el8_5 |
How do I fix ALBA-2021:4897?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is ALBA-2021:4897 being exploited?
There is no known exploitation of ALBA-2021:4897 in the wild and no public exploit code.