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Improper Restriction of Excessive Authentication Attempts in py-bcrypt

High severity GitHub Reviewed Published Oct 12, 2021 to the GitHub Advisory Database • Updated Feb 1, 2023

Package

pip py-bcrypt (pip)

Affected versions

< 0.3

Patched versions

0.3

Description

The py-bcrypt module before 0.3 for Python does not properly handle concurrent memory access, which allows attackers to bypass authentication via multiple authentication requests, which trigger the password hash to be overwritten.

References

Published by the National Vulnerability Database Jan 28, 2020
Reviewed Oct 8, 2021
Published to the GitHub Advisory Database Oct 12, 2021
Last updated Feb 1, 2023

Severity

High
7.5
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Weaknesses

CVE ID

CVE-2013-1895

GHSA ID

GHSA-r838-q6jp-58xx

Source code

No known source code
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