CVE-2013-1895

Publication date 28 January 2020

Last updated 25 August 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

7.5 · High

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
python-bcrypt 14.04 LTS trusty Not in release
13.10 saucy Ignored end of life
13.04 raring Ignored end of life
12.10 quantal Ignored end of life
12.04 LTS precise
Not affected
11.10 oneiric Ignored end of life
10.04 LTS lucid
Not affected
8.04 LTS hardy Not in release

Notes

mdeslaur

lucid and precise aren't vulnerable as v0.1 did not release the GIL.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
python-bcrypt

Severity score breakdown

Parameter Value
Base score 7.5 · High
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact High
Availability impact None
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

Other references