Vulnerability Name:

CVE-2013-1895 (CCN-83039)

Assigned:2013-03-18
Published:2013-03-18
Updated:2020-02-04
Summary: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.
CVSS v3 Severity:7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
3.7 Low (Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
5.0 Medium (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N)
3.7 Low (CCN Temporal CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-307
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2013-1895

Source: MISC
Type: Third Party Advisory, Tool Signature
http://lists.fedoraproject.org/pipermail/package-announce/2013-April/101382.html

Source: MISC
Type: Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2013-April/101387.html

Source: CCN
Type: SA52701
Python py-bcrypt Module Security Bypass Vulnerability

Source: MISC
Type: Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2013/03/26/2

Source: CCN
Type: BID-58702
Python 'py-bcrypt' Module CVE-2013-1895 Authentication Bypass Vulnerability

Source: MISC
Type: Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/58702

Source: CCN
Type: bcrypt blowfish password hashing for Python
Revision: 3bc365ff4373

Source: MISC
Type: Third Party Advisory, VDB Entry
https://exchange.xforce.ibmcloud.com/vulnerabilities/83039

Source: XF
Type: UNKNOWN
python-cve20131895-sec-bypass(83039)

Source: CCN
Type: Python Web site
py-bcrypt

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2013-1895

Vulnerable Configuration:Configuration 1:
  • cpe:/a:python:py-bcrypt:*:*:*:*:*:*:*:* (Version < 0.3)

    • Configuration 2:
  • cpe:/o:fedoraproject:fedora:17:*:*:*:*:*:*:*
  • OR cpe:/o:fedoraproject:fedora:18:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.precise:def:20131895000
    V
    		CVE-2013-1895 on Ubuntu 12.04 LTS (precise) - medium.
    2013-03-27
    oval:com.ubuntu.trusty:def:20131895000
    V
    		CVE-2013-1895 on Ubuntu 14.04 LTS (trusty) - medium.
    2013-03-27
    BACK
    python py-bcrypt *
    fedoraproject fedora 17
    fedoraproject fedora 18