CVE-2021-45848 Nicotine+ DoS on Null Character in Download Request

What is CVE-2021-45848?

CVE-2021-45848 is a high-severity denial of service vulnerability in Fedoraproject Fedora, published on 15 Mar 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Denial of service (DoS) vulnerability in Nicotine+ 3.0.3 and later allows a user with a modified Soulseek client to crash Nicotine+ by sending a file download request with a file path containing a null character.

Weakness: CWE-116

Which versions are affected by CVE-2021-45848?

3 open source packages ship an affected version, including nicotine-plus. It affects 2 products.

Products include Fedoraproject Fedora, Nicotine-Plus Nicotine\+.

How do I fix CVE-2021-45848?

Upgrade nicotine-plus to 3.2.1 or later.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2021-45848 being exploited?

There is no known exploitation of CVE-2021-45848 in the wild and no public exploit code.

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• CVE-2024-4947 Google Chromium V8 Type Confusion Exploited Critical 9.6
• CVE-2024-4671 Google Chromium Visuals Use-After-Free Exploited Critical 9.6

All Fedoraproject Fedora vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-p4v2-r99v-wjc2, PYSEC-2026-687.