Security readout for executives and security teams
Plain-English summary
CVE-2024-45490 is a critical libexpat XML parsing flaw. A program using an affected libexpat version may mishandle a negative buffer length while parsing XML. Because libexpat is widely embedded, exposure can come through operating systems, applications, and appliances rather than direct use.
Executive priority
Treat this as urgent for externally exposed systems and managed appliances because the base score is critical and libexpat is commonly embedded. Do not assume absence of direct libexpat use means absence of exposure.
Technical view
The issue is in libexpat before 2.6.3: xmlparse.c did not reject a negative length passed to XML_ParseBuffer. The CVE maps this to CWE-190 and carries CVSS 3.1 score 9.8, AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Likely exposure
Most exposure is indirect: systems, packages, applications, or appliances that include libexpat before 2.6.3 and parse XML from untrusted sources. Debian LTS, NetApp, and Siemens references indicate downstream ecosystem impact, but the bundle does not enumerate exact affected products or versions.
Exploitation context
The provided bundle does not show CISA KEV listing or cited active exploitation. The CVSS vector indicates potential remote, unauthenticated, low-complexity impact without user interaction, but no exploit status or weaponized technique is established here.
Researcher notes
The source evidence is specific about the vulnerable condition and fixed upstream version boundary, but incomplete on affected downstream products. Avoid product claims beyond cited vendor advisories. Validation should focus on dependency discovery, package status, and vendor-confirmed remediation.
Mitigation direction
- Upgrade libexpat to 2.6.3 or later where vendor-supported.
- Apply Debian, NetApp, Siemens, or other vendor advisories for bundled copies.
- Inventory software and appliances that embed libexpat indirectly.
- Prioritize internet-facing XML parsing services and exposed management interfaces.
- Check vendor guidance where package-specific fixes are not named.
Validation and detection
- Identify installed libexpat versions across hosts, containers, and images.
- Review SBOMs for statically or transitively bundled libexpat.
- Confirm vendor advisories mark deployed product versions as fixed or unaffected.
- Check XML-processing services for exposure to untrusted network input.
- Verify updated packages remain present after rebuilds or appliance updates.
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-2024-45490 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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:H/I:H/A:H3.95.9CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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/890CVE reference, mitre
- https://github.com/libexpat/libexpat/issues/887CVE reference, mitre
- https://security.netapp.com/advisory/ntap-20241018-0004/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.