Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2017-16857

Severity CVSS v4.0:
Pending analysis
Type:
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Publication date:
05/12/2017
Last modified:
20/04/2025

Description

It is possible to bypass the bitbucket auto-unapprove plugin via minimal brute-force because it is relying on asynchronous events on the back-end. This allows an attacker to merge any code into unsuspecting repositories. This affects all versions of the auto-unapprove plugin, however since the auto-unapprove plugin is not bundled with Bitbucket Server it does not affect any particular version of Bitbucket.

Impact

Vector 3.x
CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.50 HIGH
Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
8.50
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:M/Au:S/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 6.00 MEDIUM
Vector: AV:N/AC:M/Au:S/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): Single
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0
6.00
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:atlassian:bitbucket_auto_unapprove_plugin:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:bitbucket_auto_unapprove_plugin:1.0.0:beta1:*:*:*:*:*:*
cpe:2.3:a:atlassian:bitbucket_auto_unapprove_plugin:1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:bitbucket_auto_unapprove_plugin:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:bitbucket_auto_unapprove_plugin:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:bitbucket_auto_unapprove_plugin:2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:bitbucket_auto_unapprove_plugin:2.0.4:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:bitbucket_auto_unapprove_plugin:2.1.1:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:bitbucket_auto_unapprove_plugin:2.1.3:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:bitbucket_auto_unapprove_plugin:2.2.0:*:*:*:*:*:*:*
cpe:2.3:a:atlassian:bitbucket_auto_unapprove_plugin:3.0.0:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools