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atlassianSecurity-metrics-botBAM-21267
HistoryMar 10, 2021 - 11:05 a.m.

Bamboo for Windows uses a version of Git LFS vulnerable to remote code execution (CVE-2021-21237)

2021-03-1011:05:09
security-metrics-bot
jira.atlassian.com
18
bamboo
windows
git lfs
remote code execution
cve-2021-21237
incomplete fix
malicious repository
windows amis

CVSS2

10

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.954

Percentile

99.4%

Git LFS is vulnerable to remote code execution on Windows (CVE-2021-21237):

On Windows, if Git LFS operates on a malicious repository with a git.bat or git.exe file in the current directory, that program would be executed, permitting the attacker to execute arbitrary code. This does not affect Unix systems.

This is the result of an incomplete fix for CVE-2020-27955.

This issue occurs because on Windows, Go includes (and prefers) the current directory when the name of a command run does not contain a directory separator.

Fix contains only changes to Windows AMIs used by Bamboo Elastic agents

Affected configurations

Vulners
Node
atlassianbamboo_data_centerRange7.2.2
OR
atlassianbamboo_data_centerRange<7.2.3
VendorProductVersionCPE
atlassianbamboo_data_center*cpe:2.3:a:atlassian:bamboo_data_center:*:*:*:*:*:*:*:*

CVSS2

10

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS3

9.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.954

Percentile

99.4%