CVE-2022-28738: Double Free
First published: Thu Apr 14 2022(Updated: )
A double free was found in the Regexp compiler in Ruby 3.x before 3.0.4 and 3.1.x before 3.1.2. If a victim attempts to create a Regexp from untrusted user input, an attacker may be able to write to unexpected memory locations.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/ruby | <0:3.0.4-160.el9_0 | 0:3.0.4-160.el9_0 |
| redhat/rh-ruby30-ruby | <0:3.0.4-149.el7 | 0:3.0.4-149.el7 |
| Ruby-lang Ruby | >=3.0.0<3.0.4 | |
| redhat/ruby | <3.0.4 | 3.0.4 |
| redhat/ruby | <3.1.2 | 3.1.2 |
| debian/ruby2.7 | 2.7.4-1+deb11u1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2022-28738 https://nvd.nist.gov/vuln/detail/CVE-2022-28738 http://www.ruby-lang.org/en/news/2022/04/12/double-free-in-regexp-compilation-cve-2022-28738/
- https://bugzilla.redhat.com/show_bug.cgi?id=2075685
- https://access.redhat.com/errata/RHSA-2022:6450
- https://access.redhat.com/errata/RHSA-2022:6585
- https://access.redhat.com/errata/RHSA-2022:6855
- https://access.redhat.com/security/cve/CVE-2022-28738
- https://hackerone.com/reports/1220911
- https://security-tracker.debian.org/tracker/CVE-2022-28738
- https://security.netapp.com/advisory/ntap-20220624-0002/
- https://www.ruby-lang.org/en/news/2022/04/12/double-free-in-regexp-compilation-cve-2022-28738/
- https://github.com/ruby/ruby/commit/052ec6d2585c3ace95671013d336f5543624ef3d
- https://github.com/ruby/ruby/commit/73f45e5e96ccc13a131f7c0122cf8600ce5b930f
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2078342
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2078343
- https://access.redhat.com/security/cve/cve-2022-28738
- https://security.gentoo.org/glsa/202401-27
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2022-28738?
CVE-2022-28738 is a double-free vulnerability found in Ruby, specifically in the Regexp compiler.
How does CVE-2022-28738 affect Ruby?
CVE-2022-28738 allows an attacker to write to unexpected memory locations if a victim attempts to create a Regexp from untrusted user input.
Which versions of Ruby are affected by CVE-2022-28738?
Ruby 3.x before 3.0.4 and 3.1.x before 3.1.2 are affected by CVE-2022-28738.
What is the severity of CVE-2022-28738?
CVE-2022-28738 has a severity value of 9.8, which is considered critical.
How do I fix CVE-2022-28738?
To fix CVE-2022-28738, update Ruby to version 3.0.4 or 3.1.2, depending on the affected version.
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