CVE-2021-28091 Weak cryptography in n/a
High 7.5
Published
Updated
Check this codebase for CVE-2021-28091 and fix it if it is affected.
What it is: CVE-2021-28091 is a high-severity vulnerability in Debian Debian Linux, published on 4 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2021-28091 in the wild and no public exploit code.
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-2021-28091/ (Markdown: https://insights.sbomify.com/CVE-2021-28091/index.md)
Attackers can bypass authentication by exploiting improper cryptographic signature verification in the Lasso library.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-28091?
CVE-2021-28091 is a high-severity vulnerability in Debian Debian Linux, published on 4 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Lasso all versions prior to 2.7.0 has improper verification of a cryptographic signature.
Weakness: CWE-347
Which versions are affected by CVE-2021-28091?
It affects 3 products.
Linux distribution packages (28)
lasso AlmaLinux:8 | All versions | 2.6.0-12.el8 |
lasso-devel AlmaLinux:8 | All versions | 2.6.0-12.el8 |
lasso Red Hat:enterprise_linux:7::server | All versions | 0:2.5.1-8.el7_9 |
lasso-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:2.5.1-8.el7_9 |
lasso-devel Red Hat:enterprise_linux:7::server | All versions | 0:2.5.1-8.el7_9 |
lasso-python Red Hat:enterprise_linux:7::server | All versions | 0:2.5.1-8.el7_9 |
lasso Red Hat:enterprise_linux:7::workstation | All versions | 0:2.5.1-8.el7_9 |
lasso-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:2.5.1-8.el7_9 |
lasso-devel Red Hat:enterprise_linux:7::workstation | All versions | 0:2.5.1-8.el7_9 |
lasso-python Red Hat:enterprise_linux:7::workstation | All versions | 0:2.5.1-8.el7_9 |
java-lasso-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:2.6.0-12.el8 |
lasso Red Hat:enterprise_linux:8::appstream | All versions | 0:2.6.0-12.el8 |
lasso-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:2.6.0-12.el8 |
lasso-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:2.6.0-12.el8 |
perl-lasso-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:2.6.0-12.el8 |
python3-lasso-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:2.6.0-12.el8 |
java-lasso-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:2.6.0-12.el8 |
lasso-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:2.6.0-12.el8 |
lasso-debugsource Red Hat:enterprise_linux:8::crb | All versions | 0:2.6.0-12.el8 |
lasso-devel Red Hat:enterprise_linux:8::crb | All versions | 0:2.6.0-12.el8 |
perl-lasso-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:2.6.0-12.el8 |
python3-lasso-debuginfo Red Hat:enterprise_linux:8::crb | All versions | 0:2.6.0-12.el8 |
lasso Rocky Linux:8 | All versions | 0:2.6.0-12.el8 |
lasso SUSE:Linux Enterprise Server 12 SP5 | All versions | 2.6.1-8.7.2 |
lasso SUSE:Linux Enterprise Server for SAP Applications 12 SP5 | All versions | 2.6.1-8.7.2 |
lasso SUSE:Linux Enterprise Software Development Kit 12 SP5 | All versions | 2.6.1-8.7.2 |
lasso openSUSE:Leap 15.2 | All versions | 2.6.1-lp152.2.3.1 |
lasso openSUSE:Tumbleweed | All versions | 2.7.0-2.2 |
Products include Debian Debian Linux, Entrouvert Lasso, Fedoraproject Fedora.
How do I fix CVE-2021-28091?
Upgrade to a fixed version.
Is CVE-2021-28091 being exploited?
There is no known exploitation of CVE-2021-28091 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as ALSA-2021:4325, AZL-7255, DEBIAN-CVE-2021-28091, DLA-2684-1, DSA-4926-1, GHSA-5pxh-5p72-wvcm and 8 more.