Medium [CVE-2023-54354] Denial of Service via crafted XML schema
This medium-severity Red Hat Linux advisory covers CVE-2023-54354 affecting Red Hat Satellite 6.
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Summary
Nokogiri before 1.14.3 (CRuby implementation only, when using the packaged libxml2) bundles libxml2 v2.10.3, which is vulnerable to NULL pointer dereferences in XML Schema processing (xmlSchemaFixupComplexType, CVE-2023-28484, and xmlSchemaCheckCOSSTDerivedOK).
An attacker who supplies a crafted/malformed XML schema can cause libxml2 to dereference a NULL pointer and potentially segfault, resulting in a denial of service. Nokogiri 1.14.3 upgrades the packaged libxml2 to v2.10.4 to resolve these issues.
A flaw was found in Nokogiri, specifically in its bundled libxml2 library when processing XML schemas. This is a Moderate denial of service flaw in Nokogiri's bundled libxml2, affecting CRuby implementations that process XML schemas using packaged libraries.
A remote attacker could provide a specially crafted XML schema, leading to a NULL pointer dereference and causing the application to crash, thereby impacting service availability. The impact is limited to applications that directly process untrusted XML schemas with the vulnerable Nokogiri configuration.
Red Hat severity: Moderate — CVSS 5.9 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-476.
Affected Red Hat products: Red Hat Satellite 6. Red Hat does not currently list a fixing RHSA for this CVE.
- < 1.14.3
- < 10.3
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
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