CVE-2022-29970: Path Traversal
First published: Mon May 02 2022(Updated: )
Sinatra before 2.2.0 does not validate that the expanded path matches public_dir when serving static files.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/pcs | <0:0.10.12-6.el8_6.1 | 0:0.10.12-6.el8_6.1 |
| redhat/pcs | <0:0.10.2-4.el8_1.2 | 0:0.10.2-4.el8_1.2 |
| redhat/pcs | <0:0.10.4-6.el8_2.2 | 0:0.10.4-6.el8_2.2 |
| redhat/pcs | <0:0.10.8-1.el8_4.1 | 0:0.10.8-1.el8_4.1 |
| redhat/pcs | <0:0.11.1-10.el9_0.1 | 0:0.11.1-10.el9_0.1 |
| redhat/rubygem-sinatra | <1:2.2.0-1.el8 | 1:2.2.0-1.el8 |
| Sinatrarb Sinatra | <2.2.0 | |
| Debian Debian Linux | =10.0 | |
| redhat/sinatra | <2.2.0 | 2.2.0 |
Remedy
Disable the static option which will disable the public_dir option. With this configuration, Sinatra will not serve files from the public directory and therefore files outside of it.
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Reference Links
- https://nvd.nist.gov/vuln/detail/CVE-2022-29970
- https://github.com/sinatra/sinatra/pull/1683/commits/462c3ca1db53ed3cfc394cf5948e9c948ad1c10e
- https://github.com/skylightio/skylight-ruby/pull/294
- https://lists.debian.org/debian-lts-announce/2022/10/msg00034.html
- https://github.com/sinatra/sinatra/pull/1683
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/sinatra/CVE-2022-29970.yml
- https://github.com/advisories/GHSA-qp49-3pvw-x4m5 (Advisory)
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2081138
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2081139
- https://access.redhat.com/errata/RHSA-2022:2255
- https://access.redhat.com/errata/RHSA-2022:2253
- https://access.redhat.com/errata/RHSA-2022:2256
- https://access.redhat.com/errata/RHSA-2022:4587
- https://access.redhat.com/errata/RHSA-2022:4661
- https://access.redhat.com/security/cve/cve-2022-29970
- https://access.redhat.com/errata/RHSA-2022:8506
- https://bugzilla.redhat.com/show_bug.cgi?id=2081096
- https://www.cve.org/CVERecord?id=CVE-2022-29970 https://nvd.nist.gov/vuln/detail/CVE-2022-29970
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2022-29970?
CVE-2022-29970 is a vulnerability in the Sinatra web application framework that allows files outside of the public directory to be served when serving static files.
What is the severity level of CVE-2022-29970?
CVE-2022-29970 has a severity level of high (7).
How does CVE-2022-29970 affect Sinatra?
CVE-2022-29970 affects Sinatra by not validating that the expanded path matches the public directory when serving static files.
How can I fix CVE-2022-29970?
To fix CVE-2022-29970, update to Sinatra version 2.2.0 or later.
Are there any references for CVE-2022-29970?
Yes, you can find references for CVE-2022-29970 at the following links: [1] NVD, [2] GitHub - Sinatra, [3] GitHub - Skylight Ruby
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