SB2019121207 - Debian update for git
Published: December 12, 2019
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) OS Command Injection (CVE-ID: CVE-2019-19604)
The vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to a "git submodule update" operation can run commands found in the ".gitmodules" file of a malicious repository. A remote unauthenticated attacker can execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) Input validation error (CVE-ID: CVE-2019-1387)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insufficient validation of user-supplied input within the Git for Visual Studio. A remote attacker can convince the user to clone a malicious repo and execute arbitrary code on the target system.
3) Incorrect default permissions (CVE-ID: CVE-2019-1353)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists to due none of the NTFS protections are active when accessing a working directory on a regular Windows drive. A local user with access to the system can view contents of files and directories or modify them.
Note: This vulnerability occurs when running Git in the Windows Subsystem for Linux (also known as "WSL").
4) Input validation error (CVE-ID: CVE-2019-1349)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insufficient validation of user-supplied input within the Git for Visual Studio. A remote attacker can convince the user to clone a malicious repo and execute arbitrary code on the target system.
5) Input validation error (CVE-ID: CVE-2019-1352)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insufficient validation of user-supplied input within the Git for Visual Studio. A remote attacker can convince the user to clone a malicious repo and execute arbitrary code on the target system.
6) Path traversal (CVE-ID: CVE-2019-1348)
The vulnerability allows a remote attacker to perform directory traversal attacks.
The vulnerability exists due to input validation error when the export-marks option of git fast-import is exposed also via the in-stream command feature. A remote attacker can send a specially crafted HTTP request and overwrite arbitrary paths on the system.
Remediation
Install update from vendor's website.