🛡️ CVE-2013-1895 — py-bcrypt

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-307 OSV
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Improper Restriction of Excessive Authentication Attempts in py-bcrypt

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.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. Rated impact: confidentiality none, integrity high, availability none.

Weakness class

CVE-2013-1895 is classified as CWE-307: Improper Restriction of Excessive Authentication Attempts. Repeated login attempts are not limited, leaving credentials open to brute forcing.

Affected software

CVE-2013-1895 is recorded against 1 package.

  • py-bcrypt (fixed in 0.3)

Timeline and source

Published on 12 October 2021 and last revised on 21 October 2024. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
exchange.xforce.ibmcloud.com (Web)
github.com (Advisory)
github.com (Package)
github.com (Web)
lists.fedoraproject.org (Web)
lists.fedoraproject.org (Web)
www.openwall.com (Web)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CWE CWE-307
Public Exploit ✅ No
Source OSV
Published 2021-10-12
Updated 2026-08-12
Modified 2024-10-21
Fix URL N/A

Affected Packages

Software From version Fixed in
py-bcrypt — 0.3

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