rhsa-2024_3926
Vulnerability from csaf_redhat
Published
2024-06-13 14:34
Modified
2024-11-06 06:09
Summary
Red Hat Security Advisory: expat security update
Notes
Topic
An update for expat is now available for Red Hat Enterprise Linux 9.2 Extended Update Support.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
Expat is a C library for parsing XML documents.
Security Fix(es):
* expat: parsing large tokens can trigger a denial of service (CVE-2023-52425)
* expat: XML Entity Expansion (CVE-2024-28757)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer the CVE page(s) listed in the References section.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
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A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.", "title": "Topic" }, { "category": "general", "text": "Expat is a C library for parsing XML documents.\n\nSecurity Fix(es):\n\n* expat: parsing large tokens can trigger a denial of service (CVE-2023-52425)\n\n* expat: XML Entity Expansion (CVE-2024-28757)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer the CVE page(s) listed in the References section.", "title": "Details" }, { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2024:3926", "url": "https://access.redhat.com/errata/RHSA-2024:3926" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#moderate", "url": "https://access.redhat.com/security/updates/classification/#moderate" }, { "category": "external", "summary": "2262877", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2262877" }, { "category": "external", "summary": "2268766", 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"product_id": "BaseOS-9.2.0.Z.EUS:expat-devel-0:2.5.0-1.el9_2.1.x86_64" }, "product_reference": "expat-devel-0:2.5.0-1.el9_2.1.x86_64", "relates_to_product_reference": "BaseOS-9.2.0.Z.EUS" } ] }, "vulnerabilities": [ { "cve": "CVE-2023-52425", "cwe": { "id": "CWE-400", "name": "Uncontrolled Resource Consumption" }, "discovery_date": "2024-02-05T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2262877" } ], "notes": [ { "category": "description", "text": "A flaw was found in Expat (libexpat). When parsing a large token that requires multiple buffer fills to complete, Expat has to re-parse the token from start numerous times. This process may trigger excessive resource consumption, leading to a denial of service.", "title": "Vulnerability description" }, { "category": "summary", "text": "expat: parsing large tokens can trigger a denial of service", "title": "Vulnerability summary" }, { "category": "other", "text": "The identified flaw in Expat presents a moderate severity issue due to its potential to facilitate resource exhaustion attacks, particularly in scenarios involving parsing large tokens requiring multiple buffer fills. As Expat repeatedly re-parses such tokens from the beginning, it results in disproportionate resource consumption, leading to a denial-of-service (DoS) condition. While the impact is significant, the exploitation requires specific conditions, such as parsing large tokens, which may not always align with typical usage patterns.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "AppStream-9.2.0.Z.EUS:expat-0:2.5.0-1.el9_2.1.aarch64", "AppStream-9.2.0.Z.EUS:expat-0:2.5.0-1.el9_2.1.i686", "AppStream-9.2.0.Z.EUS:expat-0:2.5.0-1.el9_2.1.ppc64le", "AppStream-9.2.0.Z.EUS:expat-0:2.5.0-1.el9_2.1.s390x", "AppStream-9.2.0.Z.EUS:expat-0:2.5.0-1.el9_2.1.src", "AppStream-9.2.0.Z.EUS:expat-0:2.5.0-1.el9_2.1.x86_64", "AppStream-9.2.0.Z.EUS:expat-debuginfo-0:2.5.0-1.el9_2.1.aarch64", "AppStream-9.2.0.Z.EUS:expat-debuginfo-0:2.5.0-1.el9_2.1.i686", 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service" }, { "cve": "CVE-2024-28757", "cwe": { "id": "CWE-776", "name": "Improper Restriction of Recursive Entity References in DTDs (\u0027XML Entity Expansion\u0027)" }, "discovery_date": "2024-03-10T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "2268766" } ], "notes": [ { "category": "description", "text": "An XML Entity Expansion flaw was found in libexpat. This flaw allows an attacker to cause a denial of service when there is an isolated use of external parsers.", "title": "Vulnerability description" }, { "category": "summary", "text": "expat: XML Entity Expansion", "title": "Vulnerability summary" }, { "category": "other", "text": "Direct recursion of parameter entities repeatedly referenced themselves, creating a loop that was not detected in the external subset. This is against XML rules and caused unpredictable behaviour during runtime, which could lead to a denial of service (DoS) attack", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "AppStream-9.2.0.Z.EUS:expat-0:2.5.0-1.el9_2.1.aarch64", "AppStream-9.2.0.Z.EUS:expat-0:2.5.0-1.el9_2.1.i686", "AppStream-9.2.0.Z.EUS:expat-0:2.5.0-1.el9_2.1.ppc64le", "AppStream-9.2.0.Z.EUS:expat-0:2.5.0-1.el9_2.1.s390x", "AppStream-9.2.0.Z.EUS:expat-0:2.5.0-1.el9_2.1.src", "AppStream-9.2.0.Z.EUS:expat-0:2.5.0-1.el9_2.1.x86_64", "AppStream-9.2.0.Z.EUS:expat-debuginfo-0:2.5.0-1.el9_2.1.aarch64", "AppStream-9.2.0.Z.EUS:expat-debuginfo-0:2.5.0-1.el9_2.1.i686", "AppStream-9.2.0.Z.EUS:expat-debuginfo-0:2.5.0-1.el9_2.1.ppc64le", 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], "title": "expat: XML Entity Expansion" } ] }
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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.