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 3.14.24, 3.15.19, 3.16.15, 3.17.12, 3.18.6 and 3.19.3.
Attack Parameters
Attack Vector
Network
Атака возможна удалённо
Attack Complexity
Low
Легко эксплуатировать
Attack Requirements
None
Нет дополнительных условий
Privileges Required
Low
Нужны базовые права
User Interaction
None
Не нужно действие пользователя
Impact Assessment
Confidentiality
High
Полная утечка данных
Integrity
High
Полная модификация данных
Availability
High
Полный отказ в обслуживании
CVSS Vector v4.0
Weakness Type (CWE)
References 6
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