Fedora EPEL 7 update for libgit2
| Risk | High |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2018-17456 CVE-2018-15501 |
| CWE-ID | CWE-77 CWE-125 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software |
Fedora Operating systems & Components / Operating system libgit2 Operating systems & Components / Operating system package or component |
| Vendor | Fedoraproject |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Command injection
EUVDB-ID: #VU15167
Risk: High
CVSSv4.0: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Amber]
CVE-ID: CVE-2018-17456
CWE-ID:
CWE-77 - Command injection
Exploit availability: Yes
DescriptionThe 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.
Install updates from vendor's repository.
Vulnerable software versionsFedora: 7
libgit2: before 0.26.7-1.el7
CPE2.3 External linkshttps://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2018-a9ac6a18d2
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability. However, a fully functional exploit for this vulnerability is available.
2) Out-of-bounds read
EUVDB-ID: #VU14546
Risk: Low
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-15501
CWE-ID:
CWE-125 - Out-of-bounds read
Exploit availability: No
DescriptionThe 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.
MitigationInstall updates from vendor's repository.
Vulnerable software versionsFedora: 7
libgit2: before 0.26.7-1.el7
CPE2.3 External linkshttps://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2018-a9ac6a18d2
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
