CVE-2021-3480 Null dereference in slapi-nis
High 7.5
Published
Updated
Check this codebase for CVE-2021-3480 and fix it if it is affected.
What it is: CVE-2021-3480 is a high-severity vulnerability in Fedoraproject Fedora, published on 20 May 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-2021-3480 in the wild and no public exploit code.
Affected product: Fedoraproject Fedora. 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-2021-3480/ (Markdown: https://insights.sbomify.com/CVE-2021-3480/index.md)
An unauthenticated attacker can crash the 389-ds-base directory server via a NULL pointer dereference in the slapi-nis plugin.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-3480?
CVE-2021-3480 is a high-severity vulnerability in Fedoraproject Fedora, published on 20 May 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in slapi-nis in versions before 0.56.7. A NULL pointer dereference during the parsing of the Binding DN could allow an unauthenticated attacker to crash the 389-ds-base directory server. The highest threat from this vulnerability is to system availability.
Weakness: CWE-476
Which versions are affected by CVE-2021-3480?
It affects 2 products.
Linux distribution packages (40)
bind-dyndb-ldap AlmaLinux:8 | All versions | 11.6-2.module_el8.5.0+2603+92118e57 |
custodia AlmaLinux:8 | All versions | 0.6.0-3.module_el8.5.0+2603+92118e57 |
custodia AlmaLinux:8 | All versions | 0.6.0-3.module_el8.6.0+2881+2f24dc92 |
opendnssec AlmaLinux:8 | All versions | 2.1.7-1.module_el8.5.0+2603+92118e57 |
opendnssec AlmaLinux:8 | All versions | 2.1.7-1.module_el8.6.0+2881+2f24dc92 |
python3-custodia AlmaLinux:8 | All versions | 0.6.0-3.module_el8.5.0+2603+92118e57 |
python3-custodia AlmaLinux:8 | All versions | 0.6.0-3.module_el8.6.0+2881+2f24dc92 |
python3-jwcrypto AlmaLinux:8 | All versions | 0.5.0-1.module_el8.5.0+2603+92118e57 |
python3-jwcrypto AlmaLinux:8 | All versions | 0.5.0-1.module_el8.6.0+2737+7e73ea90 |
python3-jwcrypto AlmaLinux:8 | All versions | 0.5.0-1.module_el8.6.0+2881+2f24dc92 |
python3-kdcproxy AlmaLinux:8 | All versions | 0.4-5.module_el8.5.0+2603+92118e57 |
python3-kdcproxy AlmaLinux:8 | All versions | 0.4-5.module_el8.6.0+2881+2f24dc92 |
python3-pyusb AlmaLinux:8 | All versions | 1.0.0-9.module_el8.5.0+2603+92118e57 |
python3-pyusb AlmaLinux:8 | All versions | 1.0.0-9.module_el8.6.0+2737+7e73ea90 |
python3-pyusb AlmaLinux:8 | All versions | 1.0.0-9.module_el8.6.0+2881+2f24dc92 |
python3-qrcode AlmaLinux:8 | All versions | 5.1-12.module_el8.5.0+2603+92118e57 |
python3-qrcode AlmaLinux:8 | All versions | 5.1-12.module_el8.6.0+2737+7e73ea90 |
python3-qrcode AlmaLinux:8 | All versions | 5.1-12.module_el8.6.0+2881+2f24dc92 |
python3-qrcode-core AlmaLinux:8 | All versions | 5.1-12.module_el8.5.0+2603+92118e57 |
python3-qrcode-core AlmaLinux:8 | All versions | 5.1-12.module_el8.6.0+2737+7e73ea90 |
python3-qrcode-core AlmaLinux:8 | All versions | 5.1-12.module_el8.6.0+2881+2f24dc92 |
python3-yubico AlmaLinux:8 | All versions | 1.3.2-9.module_el8.5.0+2603+92118e57 |
python3-yubico AlmaLinux:8 | All versions | 1.3.2-9.module_el8.6.0+2737+7e73ea90 |
python3-yubico AlmaLinux:8 | All versions | 1.3.2-9.module_el8.6.0+2881+2f24dc92 |
softhsm AlmaLinux:8 | All versions | 2.6.0-5.module_el8.5.0+2603+92118e57 |
softhsm AlmaLinux:8 | All versions | 2.6.0-5.module_el8.6.0+2881+2f24dc92 |
softhsm-devel AlmaLinux:8 | All versions | 2.6.0-5.module_el8.5.0+2603+92118e57 |
softhsm-devel AlmaLinux:8 | All versions | 2.6.0-5.module_el8.6.0+2881+2f24dc92 |
slapi-nis Red Hat:enterprise_linux:7::client | All versions | 0:0.56.5-4.el7_9 |
slapi-nis-debuginfo Red Hat:enterprise_linux:7::client | All versions | 0:0.56.5-4.el7_9 |
slapi-nis Red Hat:enterprise_linux:7::computenode | All versions | 0:0.56.5-4.el7_9 |
slapi-nis-debuginfo Red Hat:enterprise_linux:7::computenode | All versions | 0:0.56.5-4.el7_9 |
slapi-nis Red Hat:enterprise_linux:7::server | All versions | 0:0.56.5-4.el7_9 |
slapi-nis-debuginfo Red Hat:enterprise_linux:7::server | All versions | 0:0.56.5-4.el7_9 |
slapi-nis Red Hat:enterprise_linux:7::workstation | All versions | 0:0.56.5-4.el7_9 |
slapi-nis-debuginfo Red Hat:enterprise_linux:7::workstation | All versions | 0:0.56.5-4.el7_9 |
bind-dyndb-ldap Red Hat:enterprise_linux:8::appstream | All versions | 0:11.6-2.module+el8.4.0+9328+4ec4e316 |
bind-dyndb-ldap-debuginfo Red Hat:enterprise_linux:8::appstream | All versions | 0:11.6-2.module+el8.4.0+9328+4ec4e316 |
bind-dyndb-ldap-debugsource Red Hat:enterprise_linux:8::appstream | All versions | 0:11.6-2.module+el8.4.0+9328+4ec4e316 |
custodia Red Hat:enterprise_linux:8::appstream | All versions | 0:0.6.0-3.module+el8.1.0+4098+f286395e |
Products include Fedoraproject Fedora, Slapi-Nis Project Slapi-Nis.
How do I fix CVE-2021-3480?
Upgrade to a fixed version.
Is CVE-2021-3480 being exploited?
There is no known exploitation of CVE-2021-3480 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
Sources
Also known as ALSA-2021:1983, DEBIAN-CVE-2021-3480, GHSA-7c98-4wpw-92jq, RHSA-2021:1983, RHSA-2021:2026, RHSA-2021:2027 and 3 more.