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CVE-2021-28965

Good to know:

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Date: April 21, 2021

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.

Language: Ruby

Severity Score

Related Resources (24)

https://rubygems.org/gems/rexml
https://github.com/ruby/rexml
https://github.com/ruby/rexml/commit/6a250d2cd1194c2be72becbdd9c3e770aa16e752
https://www.ruby-lang.org/en/news/2021/04/05/xml-round-trip-vulnerability-in-rexml-cve-2021-28965/
https://github.com/ruby/rexml/commit/f7bab8937513b1403cea5aff874cbf32fd5e8551
https://security-tracker.debian.org/tracker/CVE-2021-28965
https://people.canonical.com/~ubuntu-security/cve/CVE-2021-28965
https://hackerone.com/reports/1104077
https://access.redhat.com/security/cve/CVE-2021-28965
https://security.alpinelinux.org/vuln/CVE-2021-28965
https://nvd.nist.gov/vuln/detail/CVE-2021-28965
https://github.com/ruby/rexml/commit/a659c63e37414506dfb0d4655e031bb7a2e73fc8
https://security.netapp.com/advisory/ntap-20210528-0003
https://github.com/ruby/rexml/commit/9b311e59ae05749e082eb6bbefa1cb620d1a786e
https://github.com/ruby/rexml/commit/2fe62e29094d95921d7e19abbd2e26b23d78dc5b
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WTVFTLFVCSUE5CXHINJEUCKSHU4SWDMT/
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rexml/CVE-2021-28965.yml
https://github.com/ruby/rexml/commit/3c137eb119550874b2b3e27d12b733ca67033377
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WTVFTLFVCSUE5CXHINJEUCKSHU4SWDMT
https://security.netapp.com/advisory/ntap-20210528-0003/
https://github.com/ruby/rexml/commit/f9d88e4948b4a43294c25dc0edb16815bd9d8618
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WTVFTLFVCSUE5CXHINJEUCKSHU4SWDMT/
https://www.ruby-lang.org/en/news/2021/04/05/xml-round-trip-vulnerability-in-rexml-cve-2021-28965
https://www.mend.io/vulnerability-database/CVE-2021-28965

Severity Score

Weakness Type (CWE)

Improper Restriction of XML External Entity Reference ('XXE')

CWE-611

Misinterpretation of Input

CWE-115

Top Fix

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Upgrade Version

Upgrade to version rexml - 3.1.9.1, 3.2.5

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): HIGH
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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