PT-2021-18372 · Pypi · Flask-Appbuilder

Dolev Farhi · Published 2021-05-27 · Updated 2024-03-06 · CVE-2021-29621

Positive Technologies (AI Summary)

CVSS v4.0

6.9

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions Flask-AppBuilder versions 3.2.3 and earlier

Description The issue allows a non-authenticated user to enumerate existing accounts by timing the response time from the server when logging in. This is due to user enumeration in database authentication in Flask-AppBuilder.

Recommendations For versions 3.2.3 and earlier, upgrade to version 3.3.0 or higher to resolve the issue. As a temporary workaround, consider restricting access to the login functionality to minimize the risk of exploitation.

Fix

Side Channel Attack

Weakness Enumeration

CWE-203

Related Identifiers

BIT-AIRFLOW-2021-29621

CVE-2021-29621

GHSA-434H-P4GX-JM89

PYSEC-2021-90

Affected Products

Flask-Appbuilder

References · 16

• https://github.com/dpgaspar/Flask-AppBuilder/commit/780bd0e8fbf2d36ada52edb769477e0a4edae580 · Patch
• https://osv.dev/vulnerability/GHSA-434h-p4gx-jm89 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-29621 · Security Note
• https://osv.dev/vulnerability/BIT-airflow-2021-29621 · Vendor Advisory
• https://osv.dev/vulnerability/PYSEC-2021-90 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-29621 · Vendor Advisory
• https://github.com/dpgaspar/Flask-AppBuilder/security/advisories/GHSA-434h-p4gx-jm89 · Note
• https://github.com/dpgaspar/Flask-AppBuilder · Note
• https://github.com/pypa/advisory-database/tree/main/vulns/flask-appbuilder/PYSEC-2021-90.yaml · Note
• https://pypi.org/project/Flask-AppBuilder · Note
• https://lists.apache.org/thread.html/r466759f377651f0a690475d5a52564d0e786e82c08d5a5730a4f8352@%3Cannounce.apache.org%3E · Note
• https://lists.apache.org/thread.html/r466759f377651f0a690475d5a52564d0e786e82c08d5a5730a4f8352%40%3Cannounce.apache.org%3E · Note
• https://lists.apache.org/thread.html/r91067f953906d93aaa1c69fe2b5472754019cc6bd4f1ba81349d62a0%40%3Ccommits.airflow.apache.org%3E · Note
• https://lists.apache.org/thread.html/r5b754118ba4e996adf03863705d34168bffec202da5c6bdc9bf3add5@%3Cannounce.apache.org%3E · Note
• https://lists.apache.org/thread.html/r91067f953906d93aaa1c69fe2b5472754019cc6bd4f1ba81349d62a0@%3Ccommits.airflow.apache.org%3E · Note