Multiple vulnerabilities in RubyGems
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2018-1000079 CVE-2018-1000077 CVE-2018-1000073 |
| CWE-ID | CWE-22 CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
RubyGems Universal components / Libraries / Libraries used by multiple products Universal components / Libraries / Scripting languages |
| Vendor | Ruby |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Path traversal
EUVDB-ID: #VU11615
Risk: Low
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-1000079
CWE-ID:
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to modify file locations on the target system.
The weakness exists due to the improper handling of pathnames when the affected software installs new components. A remote attacker can persuade the victim into install a malicious RubyGems gem and use directory traversal techniques to write to arbitrary file locations.
Update to version 2.7.6.
Vulnerable software versionsRubyGems: 2.5.0 - 2.7.5
CPE2.3- cpe:2.3:a:ruby:rubygems:2.5.0:*:*:*:*:*:*:*
- cpe:2.3:a:ruby:rubygems:2.5.1:*:*:*:*:*:*:*
- cpe:2.3:a:ruby:rubygems:2.5.2:*:*:*:*:*:*:*
https://blog.rubygems.org/2018/02/15/2.7.6-released.html
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.
2) Improper input validation
EUVDB-ID: #VU11628
Risk: Low
CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-1000077
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote unauthenticated attacker to write arbitrary files on the target system.
The weakness exists due to improper URL validation of the specification homepage attribute. A remote attacker can trick the victim into installing a malicious RubyGems gem and set an invalid homepage URL.
MitigationUpdate to version 2.7.6.
Vulnerable software versionsRubyGems: 2.2.0 - 2.7.5
CPE2.3- cpe:2.3:a:ruby:rubygems:2.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:ruby:rubygems:2.2.1:*:*:*:*:*:*:*
- cpe:2.3:a:ruby:rubygems:2.2.2:*:*:*:*:*:*:*
https://blog.rubygems.org/2018/02/15/2.7.6-released.html
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.
3) Path traversal
EUVDB-ID: #VU11647
Risk: Low
CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]
CVE-ID: CVE-2018-1000073
CWE-ID:
CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to obtain potentially sensitive information on the target system.
The weakness exists in the install_location function of package.rb due to path traversal when writing to a symlinked basedir outside of the root. A remote attacker can gain access to potentially sensitive information.
Update to version 2.7.6.
Vulnerable software versionsRubyGems: 2.2.0 - 2.5.0
CPE2.3- cpe:2.3:a:ruby:ruby:2.2.0:*:*:*:*:*:*:*
- cpe:2.3:a:ruby:ruby:2.2.1:*:*:*:*:*:*:*
- cpe:2.3:a:ruby:ruby:2.2.2:*:*:*:*:*:*:*
https://blog.rubygems.org/2018/02/15/2.7.6-released.html
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.
