An improper neutralization of special elements vulnerability was identified in GitHub Enterprise Server that allowed an attacker with push access to a repository to achieve remote code execution on the instance. During a git push operation, user-supplied push option values were not properly sanitized before being included in internal service headers. Because the internal header format used a delimiter character that could also appear in user input, an attacker could inject additional metadata fields through crafted push option values.
This vulnerability was reported via the GitHub Bug Bounty program and has been fixed in GitHub Enterprise Server versions 3.14.25, 3.15.20, 3.16.16, 3.17.13, 3.18.7 and 3.19.4.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service
CVSS Vector v4.0
Weakness Type (CWE)
Vulnerable Products 6
| Configuration | From (including) | Up to (excluding) |
|---|---|---|
|
Github Enterprise_Server
cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*
|
— |
3.14.24
|
|
Github Enterprise_Server
cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*
|
3.15.0
|
3.15.19
|
|
Github Enterprise_Server
cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*
|
3.16.0
|
3.16.15
|
|
Github Enterprise_Server
cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*
|
3.17.0
|
3.17.12
|
|
Github Enterprise_Server
cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*
|
3.18.0
|
3.18.6
|
|
Github Enterprise_Server
cpe:2.3:a:github:enterprise_server:*:*:*:*:*:*:*:*
|
3.19.0
|
3.19.3
|
References 12
https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.24
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.19
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.15
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.12
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.6
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.3
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.14/admin/release-notes#3.14.25
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.15/admin/release-notes#3.15.20
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.16/admin/release-notes#3.16.16
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.17/admin/release-notes#3.17.13
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.18/admin/release-notes#3.18.7
product-cna@github.com
https://docs.github.com/en/enterprise-server@3.19/admin/release-notes#3.19.4
product-cna@github.com