high7.5
CVE-2021-28965
REXML round-trip instability
Impact
The REXML gem before 3.2.5 in Ruby before 2.6.7, 2.7.x before 2.7.3, and 3.x before 3.0.1 does not properly address XML round-trip issues. An incorrect document can be produced after parsing and serializing.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| rubygems | rexml | < 3.2.5 | 3.2.5 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Ruby-Lang | Rexml | before 3.2.5 |
| Ruby-Lang | Ruby | before 2.6.7 from 2.7.0 before 2.7.3 from 3.0.0 before 3.0.1 |
| Fedoraproject | Fedora | Version 34 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WTVFTLFVCSUE5CXHINJEUCKSHU4SWDMT/
- https://security.netapp.com/advisory/ntap-20210528-0003/
- https://www.ruby-lang.org/en/news/2021/04/05/xml-round-trip-vulnerability-in-rexml-cve-2021-28965/
- https://github.com/advisories/GHSA-8cr8-4vfw-mr7h
- https://nvd.nist.gov/vuln/detail/CVE-2021-28965
- https://github.com/ruby/rexml/commit/2fe62e29094d95921d7e19abbd2e26b23d78dc5b
- https://github.com/ruby/rexml/commit/3c137eb119550874b2b3e27d12b733ca67033377
- https://github.com/ruby/rexml/commit/6a250d2cd1194c2be72becbdd9c3e770aa16e752
- https://github.com/ruby/rexml/commit/9b311e59ae05749e082eb6bbefa1cb620d1a786e
- https://github.com/ruby/rexml/commit/a659c63e37414506dfb0d4655e031bb7a2e73fc8
- https://github.com/ruby/rexml/commit/f7bab8937513b1403cea5aff874cbf32fd5e8551
- https://github.com/ruby/rexml/commit/f9d88e4948b4a43294c25dc0edb16815bd9d8618
- https://hackerone.com/reports/1104077
- https://rubygems.org/gems/rexml
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WTVFTLFVCSUE5CXHINJEUCKSHU4SWDMT/
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rexml/CVE-2021-28965.yml