CVE-2023-49569: Maliciously crafted Git server replies can lead to path traversal and RCE on go-git clients
Impact A path traversal vulnerability was discovered in go-git versions prior to v5.11. This vulnerability allows an attacker to create and amend files across the filesystem. In the worse case scenario, remote code execution could be achieved.
Applications are only affected if they are using the ChrootOS, which is the default when using "Plain" versions of Open and Clone funcs (e.g. PlainClone). Applications using BoundOS or in-memory filesystems are not affected by this issue. This is a go-git implementation issue and does not affect the upstream git cli.
Patches Users running versions of go-git from v4 and above are recommended to upgrade to v5.11 in order to mitigate this vulnerability.
Workarounds In cases where a bump to the latest version of go-git is not possible in a timely manner, we recommend limiting its use to only trust-worthy Git servers.
Credit Thanks to Ionut Lalu for responsibly disclosing this vulnerability to us.
Other sources
A path traversal vulnerability was discovered in go-git versions prior to v5.11. This vulnerability allows an attacker to create and amend files across the filesystem. In the worse case scenario, remote code execution could be achieved.
Applications are only affected if they are using the ChrootOS https://pkg.go.dev/github.com/go-git/go-billy/v5/osfs#ChrootOS , which is the default when using "Plain" versions of Open and Clone funcs (e.g. PlainClone). Applications using BoundOS https://pkg.go.dev/github.com/go-git/go-billy/v5/osfs#BoundOS or in-memory filesystems are not affected by this issue. This is a go-git implementation issue and does not affect the upstream git cli.
— MITRE
go-git could allow a remote attacker to traverse directories on the system. By sending a specially crafted request using the ChrootOS
— IBM
Maliciously crafted Git server replies can lead to path traversal and RCE on go-git clients
— Microsoft
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the severity of CVE-2023-49569?
CVE-2023-49569 has been classified with a high severity due to its potential for remote code execution.
How do I fix CVE-2023-49569?
To mitigate CVE-2023-49569, upgrade to go-git version 5.11 or later.
What is the impact of CVE-2023-49569?
CVE-2023-49569 allows attackers to conduct path traversal attacks, enabling them to create and amend files across the filesystem.
Which software is affected by CVE-2023-49569?
CVE-2023-49569 affects go-git versions prior to 5.11 and certain versions of IBM Db2 on Cloud Pak for Data.
How does CVE-2023-49569 allow remote code execution?
CVE-2023-49569 allows remote code execution through its path traversal vulnerability that lets attackers manipulate filesystem paths.