SB2018100822 - Fedora EPEL 7 update for libgit2
Published: October 8, 2018 Updated: April 24, 2025
Security Bulletin ID
SB2018100822
Severity
High
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Command injection (CVE-ID: CVE-2018-17456)
The vulnerability allows a remote attacker to execute arbitrary commands on the target system.The weakness exists in the Git command line client, Git Desktop, and Atom due to command injection during processing of a recursive "git clone" of a superproject if a .gitmodules file has a URL field beginning with a '-' character.. A remote attacker can use a specially crafted.gitmodules file that contains an URL that starts with a dash. By using a dash, when Git clones a repository using the --recurse-submodules argument, the command will interpret the URL as an option that can be used to execute arbitrary code with elevated privileges.
Successful exploitation of the vulnerability may result in system compromise.
2) Out-of-bounds read (CVE-ID: CVE-2018-15501)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to out-of-bounds read in ng_pkt in transports/smart_pkt.c in libgit2. A remote attacker can send a specially crafted smart-protocol "ng" packet that lacks a '' byte and cause the service to crash.
Remediation
Install update from vendor's website.