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Vulnerability details: VCID-v8uu-3mwj-j3a9
Vulnerability ID VCID-v8uu-3mwj-j3a9
Aliases CVE-2024-43398
GHSA-vmwr-mc7x-5vc3
Summary REXML denial of service vulnerability ### Impact The REXML gem before 3.3.6 has a DoS vulnerability when it parses an XML that has many deep elements that have same local name attributes. If you need to parse untrusted XMLs with tree parser API like `REXML::Document.new`, you may be impacted to this vulnerability. If you use other parser APIs such as stream parser API and SAX2 parser API, this vulnerability is not affected. ### Patches The REXML gem 3.3.6 or later include the patch to fix the vulnerability. ### Workarounds Don't parse untrusted XMLs with tree parser API. ### References * https://www.ruby-lang.org/en/news/2024/08/22/dos-rexml-cve-2024-43398/ : An announce on www.ruby-lang.org
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2024-43398.json
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2024-43398
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2024-43398
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2024-43398
epss 0.00177 https://api.first.org/data/v1/epss?cve=CVE-2024-43398
epss 0.00208 https://api.first.org/data/v1/epss?cve=CVE-2024-43398
epss 0.00208 https://api.first.org/data/v1/epss?cve=CVE-2024-43398
epss 0.00208 https://api.first.org/data/v1/epss?cve=CVE-2024-43398
epss 0.00208 https://api.first.org/data/v1/epss?cve=CVE-2024-43398
epss 0.00208 https://api.first.org/data/v1/epss?cve=CVE-2024-43398
epss 0.00225 https://api.first.org/data/v1/epss?cve=CVE-2024-43398
epss 0.00225 https://api.first.org/data/v1/epss?cve=CVE-2024-43398
epss 0.00225 https://api.first.org/data/v1/epss?cve=CVE-2024-43398
cvssv3.1 7.5 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-vmwr-mc7x-5vc3
cvssv3.1 5.9 https://github.com/ruby/rexml
generic_textual HIGH https://github.com/ruby/rexml
cvssv3.1 5.9 https://github.com/ruby/rexml/commit/7cb5eaeb221c322b9912f724183294d8ce96bae3
generic_textual HIGH https://github.com/ruby/rexml/commit/7cb5eaeb221c322b9912f724183294d8ce96bae3
cvssv3.1 5.9 https://github.com/ruby/rexml/releases/tag/v3.3.6
generic_textual HIGH https://github.com/ruby/rexml/releases/tag/v3.3.6
ssvc Track https://github.com/ruby/rexml/releases/tag/v3.3.6
cvssv3 5.9 https://github.com/ruby/rexml/security/advisories/GHSA-vmwr-mc7x-5vc3
cvssv3.1 5.9 https://github.com/ruby/rexml/security/advisories/GHSA-vmwr-mc7x-5vc3
cvssv3.1_qr HIGH https://github.com/ruby/rexml/security/advisories/GHSA-vmwr-mc7x-5vc3
generic_textual HIGH https://github.com/ruby/rexml/security/advisories/GHSA-vmwr-mc7x-5vc3
ssvc Track https://github.com/ruby/rexml/security/advisories/GHSA-vmwr-mc7x-5vc3
cvssv3.1 5.9 https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rexml/CVE-2024-43398.yml
generic_textual HIGH https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rexml/CVE-2024-43398.yml
cvssv3.1 5.9 https://nvd.nist.gov/vuln/detail/CVE-2024-43398
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2024-43398
cvssv3.1 5.9 https://security.netapp.com/advisory/ntap-20250103-0006
generic_textual HIGH https://security.netapp.com/advisory/ntap-20250103-0006
cvssv3.1 5.9 https://www.ruby-lang.org/en/news/2024/08/22/dos-rexml-cve-2024-43398
generic_textual HIGH https://www.ruby-lang.org/en/news/2024/08/22/dos-rexml-cve-2024-43398
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2024-43398.json
https://api.first.org/data/v1/epss?cve=CVE-2024-43398
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-43398
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://github.com/ruby/rexml
https://github.com/ruby/rexml/commit/7cb5eaeb221c322b9912f724183294d8ce96bae3
https://github.com/ruby/rexml/releases/tag/v3.3.6
https://github.com/ruby/rexml/security/advisories/GHSA-vmwr-mc7x-5vc3
https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rexml/CVE-2024-43398.yml
https://nvd.nist.gov/vuln/detail/CVE-2024-43398
https://security.netapp.com/advisory/ntap-20250103-0006
https://security.netapp.com/advisory/ntap-20250103-0006/
https://www.ruby-lang.org/en/news/2024/08/22/dos-rexml-cve-2024-43398
1083190 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1083190
2307297 https://bugzilla.redhat.com/show_bug.cgi?id=2307297
GHSA-vmwr-mc7x-5vc3 https://github.com/advisories/GHSA-vmwr-mc7x-5vc3
RHSA-2024:6670 https://access.redhat.com/errata/RHSA-2024:6670
RHSA-2024:6702 https://access.redhat.com/errata/RHSA-2024:6702
RHSA-2024:6703 https://access.redhat.com/errata/RHSA-2024:6703
RHSA-2024:6784 https://access.redhat.com/errata/RHSA-2024:6784
RHSA-2024:6785 https://access.redhat.com/errata/RHSA-2024:6785
RHSA-2025:4063 https://access.redhat.com/errata/RHSA-2025:4063
RHSA-2025:4488 https://access.redhat.com/errata/RHSA-2025:4488
USN-7256-1 https://usn.ubuntu.com/7256-1/
USN-7418-1 https://usn.ubuntu.com/7418-1/
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2024-43398.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/ruby/rexml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/ruby/rexml/commit/7cb5eaeb221c322b9912f724183294d8ce96bae3
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/ruby/rexml/releases/tag/v3.3.6
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-08-22T14:43:15Z/ Found at https://github.com/ruby/rexml/releases/tag/v3.3.6
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/ruby/rexml/security/advisories/GHSA-vmwr-mc7x-5vc3
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2024-08-22T14:43:15Z/ Found at https://github.com/ruby/rexml/security/advisories/GHSA-vmwr-mc7x-5vc3
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rexml/CVE-2024-43398.yml
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2024-43398
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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unchanged

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://security.netapp.com/advisory/ntap-20250103-0006
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

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none

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required

unchanged

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Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://www.ruby-lang.org/en/news/2024/08/22/dos-rexml-cve-2024-43398
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

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none
Exploit Prediction Scoring System (EPSS)
Percentile 0.39796
EPSS Score 0.00177
Published At July 12, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:10:12.565190+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2024/08/GHSA-vmwr-mc7x-5vc3/GHSA-vmwr-mc7x-5vc3.json 36.1.3