CVE-2021-28861 Open redirect in n/a

What is CVE-2021-28861?

CVE-2021-28861 is a medium-severity vulnerability in Fedoraproject Fedora, published on 23 Aug 2022. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Python 3.x through 3.10 has an open redirection vulnerability in lib/http/server.py due to no protection against multiple (/) at the beginning of URI path which may leads to information disclosure. NOTE: this is disputed by a third party because the http.server.html documentation page states "Warning: http.server is not recommended for production. It only implements basic security checks."

Weakness: CWE-601

Which versions are affected by CVE-2021-28861?

3 open source packages ship an affected version, including libpython, python and python-min. It affects 2 products.

Products include Fedoraproject Fedora, Python Python.

How do I fix CVE-2021-28861?

Upgrade libpython to a fixed version for your release line: 3.7.14, 3.8.14, 3.9.14 or 3.10.6.

Is CVE-2021-28861 being exploited?

There is no known exploitation of CVE-2021-28861 in the wild and no public exploit code.

Other vulnerabilities in Fedoraproject Fedora

• CVE-2024-4577 PHP-CGI OS Command Injection Exploited Critical 9.8
• CVE-2021-39226 Grafana Authentication Bypass Exploited Critical 9.8
• CVE-2019-5544 VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Exploited Critical 9.8
• 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 AZL-10618, BIT-libpython-2021-28861, BIT-python-2021-28861, BIT-python-min-2021-28861, CLSA-2022-1663183291, CLSA-2022-1663184139 and 21 more.