Ruby up to 2.2.9/2.3.6/2.4.3/2.5.0 RubyGems package.rb install_location path traversal
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
6.8 | $0-$5k | 0.00 |
A vulnerability, which was classified as critical, has been found in Ruby up to 2.2.9/2.3.6/2.4.3/2.5.0 (Programming Language Software). Affected by this issue is the function install_location
of the file package.rb of the component RubyGems. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, and integrity. CVE summarizes:
RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Directory Traversal vulnerability in install_location function of package.rb that can result in path traversal when writing to a symlinked basedir outside of the root. This vulnerability appears to have been fixed in 2.7.6.
The bug was discovered 02/15/2018. The weakness was presented 03/13/2018 (Website). The advisory is shared for download at blog.rubygems.org. This vulnerability is handled as CVE-2018-1000073 since 02/21/2018. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1006.
The vulnerability was handled as a non-public zero-day exploit for at least 26 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 109058 (Ubuntu 14.04 LTS : ruby1.9.1, ruby2.0 regression (USN-3621-2)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 237072 (Red Hat Update for rh-ruby25-ruby (RHSA-2018:3731)).
Upgrading eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (109058). See 114429, 114430, 114431 and 114432 for similar entries.
Product
Type
Name
Version
- 2.0
- 2.1
- 2.2
- 2.2.0
- 2.2.1
- 2.2.2
- 2.2.3
- 2.2.4
- 2.2.5
- 2.2.6
- 2.2.7
- 2.2.8
- 2.2.9
- 2.3
- 2.3.0
- 2.3.1
- 2.3.2
- 2.3.3
- 2.3.4
- 2.3.5
- 2.3.6
- 2.4
- 2.4.0
- 2.4.1
- 2.4.2
- 2.4.3
- 2.5
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 7.0VulDB Meta Temp Score: 6.8
VulDB Base Score: 6.5
VulDB Temp Score: 6.2
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 7.5
NVD Vector: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
unlock | unlock | unlock | unlock | unlock | unlock |
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Path traversalCWE: CWE-22
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
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Today | unlock | unlock | unlock | unlock |
Nessus ID: 109058
Nessus Name: Ubuntu 14.04 LTS : ruby1.9.1, ruby2.0 regression (USN-3621-2)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
OpenVAS ID: 881453
OpenVAS Name: Fedora Update for ruby FEDORA-2018-1fffa787e7
OpenVAS File: 🔍
OpenVAS Family: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Patch: github.com
Timeline
02/15/2018 🔍02/21/2018 🔍
03/13/2018 🔍
03/13/2018 🔍
03/14/2018 🔍
03/28/2018 🔍
04/13/2018 🔍
04/16/2018 🔍
02/21/2023 🔍
Sources
Advisory: USN-3621-2Status: Confirmed
CVE: CVE-2018-1000073 (🔍)
OVAL: 🔍
SecurityFocus: 103686 - Ruby CVE-2018-6914 Directory Traversal Vulnerability
See also: 🔍
Entry
Created: 03/14/2018 07:44Updated: 02/21/2023 14:13
Changes: 03/14/2018 07:44 (77), 01/12/2020 20:12 (5), 02/21/2023 14:12 (5), 02/21/2023 14:13 (1)
Complete: 🔍
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