Assessment
Why it matters
CISA lists this vulnerability as known to be exploited; exploitation is confirmed; EPSS is 95.5%; technical severity is CVSS 7.5.
Directory traversal vulnerability in Action View in Ruby on Rails before 3.2.22.1, 4.0.x and 4.1.x before 4.1.14.1, 4.2.x before 4.2.5.1, and 5.x before 5.0.0.beta1.1 allows remote attackers to read arbitrary files by leveraging an application's unrestricted use of the render method and providing a .. (dot dot) in a pathname.
Who should care
- Teams operating Debian Linux, Leap, Opensuse +4 more
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether Debian Linux, Leap, Opensuse +4 more is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Debian Security advisory Dsa 3464
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteAutomated link verification has not completed for this guidance yet.
Advisory
Technical details
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- CWE
- CWE-22
- Affected versions
- Debian Debian Linux (Version 8.0); Opensuse Leap (Version 42.1); Opensuse Opensuse (Version 13.2); Rails Ruby on Rails; Redhat Software Collections (Version 1.0); Rubyonrails Rails (End Excluding 3.2.22.1 | Start Including 4.0.0, End Excluding 4.1.14.1 | Start Including 4.2.0, End Excluding 4.2.5.1 | Version 5.0.0); Suse Linux Enterprise Module For Containers (Version 12)
- Fixed versions
- Rubyonrails Rails (Fixed from 3.2.22.1, 4.1.14.1, 4.2.5.1)
- Published
- 16 February 2016
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
Signal timeline
- CVE published
- Added to CISA KEV
- Latest EPSS score: 95.5%
- Signal calculated at 82
External references
- Red Hat Third-party advisory RHSA 2016 0296
- CISA Government advisory CVE-2016-0752
- Lists Fedoraproject Technical reference 178044
- Lists Fedoraproject Technical reference 178069
- Lists Opensuse Third-party advisory Msg00053
- Lists Opensuse Third-party advisory Msg00034
- Lists Opensuse Third-party advisory Msg00043
- Exploit information from www.openwall.com
- Securityfocus Third-party advisory
- Securitytracker Third-party advisory 1034816
- Exploit information from www.exploit-db.com