HIGH
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
Published Jan 28, 2020
8.7
HIGHCVSS 4.0
EPSS 2.83%
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.
Affected products
-
- Version before 0.3StatusaffectedConstraints-
- Version
Configuration 2
OR
- 17
- 18
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
8.7 HIGH GHSA
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
Attack Vector Network
Attack Complexity Low
Attack Requirements None
Privileges Required None
User Interaction None
Vulnerable System Confidentiality None
Vulnerable System Integrity High
Vulnerable System Availability None
Subsequent System Confidentiality None
Subsequent System Integrity None
Subsequent System Availability None
7.5 HIGH NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact None
Integrity Impact High
Availability Impact None
No CVSS v3.0 score for this CVE.
5.0 MEDIUM NVD
AV:N/AC:L/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
2.83% 0.02835
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.02835
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.83% (0.02835) | 86.14th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.83% (0.02835) | 84.75th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.30% (0.00301) | 51.28th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.64% (0.01636) | 88.04th | v3 (v2023.03.01) |
| Jun 25, 2024 | 1.64% (0.01636) | 87.63th | v3 (v2023.03.01) |
| May 8, 2023 | 1.72% (0.01717) | 85.95th | v3 (v2023.03.01) |
| May 1, 2023 | 1.14% (0.01142) | 82.64th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.81% (0.00807) | 79.09th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.02% (0.01018) | 40.69th | v2 (v2022.01.01) |
| Sep 10, 2022 | 1.02% (0.01018) | 38.88th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.02% (0.01018) | 36.86th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.02% (0.01018) | 19.50th | v2 (v2022.01.01) |
Weaknesses (1)
References (8)
- http://lists.fedoraproject.org/pipermail/package-announce/2013-April/101382.html x_refsource_MISCThird Party AdvisoryTool Signature
- http://lists.fedoraproject.org/pipermail/package-announce/2013-April/101387.html x_refsource_MISCThird Party Advisory
- http://www.openwall.com/lists/oss-security/2013/03/26/2 x_refsource_MISCMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/58702 x_refsource_MISCThird Party AdvisoryVDB Entry
- https://exchange.xforce.ibmcloud.com/vulnerabilities/83039 x_refsource_MISCThird Party AdvisoryVDB Entry
- https://github.com/advisories/GHSA-r838-q6jp-58xx Advisory
- https://github.com/pypa/advisory-database/tree/main/vulns/py-bcrypt/PYSEC-2020-249.yaml
- https://nvd.nist.gov/vuln/detail/CVE-2013-1895
| Link | Providers | Tags |
|---|---|---|
| http://lists.fedoraproject.org/pipermail/package-announce/2013-April/101382.html | x_refsource_MISCThird Party AdvisoryTool Signature | |
| http://lists.fedoraproject.org/pipermail/package-announce/2013-April/101387.html | x_refsource_MISCThird Party Advisory | |
| http://www.openwall.com/lists/oss-security/2013/03/26/2 | x_refsource_MISCMailing ListThird Party Advisory | |
| http://www.securityfocus.com/bid/58702 | x_refsource_MISCThird Party AdvisoryVDB Entry | |
| https://exchange.xforce.ibmcloud.com/vulnerabilities/83039 | x_refsource_MISCThird Party AdvisoryVDB Entry | |
| https://github.com/advisories/GHSA-r838-q6jp-58xx | Advisory | |
| https://github.com/pypa/advisory-database/tree/main/vulns/py-bcrypt/PYSEC-2020-249.yaml | ||
| https://nvd.nist.gov/vuln/detail/CVE-2013-1895 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner redhat
Published Jan 28, 2020
Updated Aug 6, 2024
Reserved Feb 19, 2013
Link CVE-2013-1895
CISA Vulnrichment
GHSA-R838-Q6JP-58XX Updated n/a