Security readout for executives and security teams
Plain-English summary
CVE-2024-45491 affects libexpat before 2.6.3, a common XML parsing library. On 32-bit platforms, a counter overflow in DTD handling may let malicious XML cause limited confidentiality, integrity, and availability impact. The main business concern is hidden dependency exposure in products that embed libexpat.
Executive priority
Treat as a high-priority dependency remediation item, not an emergency based on current evidence. Focus on asset discovery, vendor patch tracking, and fast remediation for exposed 32-bit XML-processing systems.
Technical view
The issue is a CWE-190 integer overflow in dtdCopy within xmlparse.c. The overflow involves nDefaultAtts on 32-bit platforms where UINT_MAX equals SIZE_MAX. The CVSS 3.1 score is 7.3 with network attack vector, low complexity, no privileges, and no user interaction.
Likely exposure
Exposure is most likely in systems or vendor products using libexpat before 2.6.3 on 32-bit platforms, especially where XML from untrusted sources is parsed. The source bundle does not provide a complete affected-product list.
Exploitation context
The bundle does not show CISA KEV listing or other evidence of active exploitation. Public GitHub issue and pull request references exist, so technical details and the fix history are public.
Researcher notes
Key uncertainty is affected-product scope: the CVE record lists generic n/a affected fields, while references point to upstream, Debian, NetApp, and Siemens advisories. Validate by dependency evidence rather than product-name matching alone.
Mitigation direction
- Upgrade libexpat to 2.6.3 or later where directly managed.
- Apply vendor-supplied updates for embedded libexpat in appliances and products.
- Prioritize 32-bit systems that parse network-supplied XML.
- Review Debian, NetApp, and Siemens advisories for product-specific status.
- If updates are unavailable, check vendor guidance for temporary controls.
Validation and detection
- Inventory direct and transitive libexpat versions across servers, containers, and appliances.
- Identify 32-bit platforms or builds using vulnerable libexpat versions.
- Confirm vendor advisories for NetApp, Debian, Siemens, and other owned products.
- Verify patched packages report libexpat 2.6.3 or vendor-fixed backports.
- Check XML-facing services for exposure to untrusted network input.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-190: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2024-45491 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 7.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L3.93.4CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
7.3HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE publishedCVE Program
The CVE record was published.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/libexpat/libexpat/pull/891CVE reference, mitre
- https://github.com/libexpat/libexpat/issues/888CVE reference, mitre
- https://security.netapp.com/advisory/ntap-20241018-0003/CVE reference, CVE
- https://lists.debian.org/debian-lts-announce/2024/09/msg00036.htmlCVE reference, CVE
- https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlCVE reference, siemens-SADP
- https://cert-portal.siemens.com/productcert/html/ssa-613116.htmlCVE reference, siemens-SADP
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Integer Overflow or Wraparound
Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.