Vulnerability-Lookup

GHSA-PFMV-2R4F-J9MJ

Vulnerability from github – Published: 2022-02-10 00:01 – Updated: 2026-10-14 15:31

Details

In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).

Severity

8.8 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2021-45960"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-682"
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    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2022-01-01T19:15:00Z",
    "severity": "HIGH"
  },
  "details": "In Expat (aka libexpat) before 2.4.3, a left shift by 29 (or more) places in the storeAtts function in xmlparse.c can lead to realloc misbehavior (e.g., allocating too few bytes, or only freeing memory).",
  "id": "GHSA-pfmv-2r4f-j9mj",
  "modified": "2026-10-14T15:31:10Z",
  "published": "2022-02-10T00:01:20Z",
  "references": [
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      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-45960"
    },
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    },
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    },
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CVE-2021-45960 (GCVE-0-2021-45960)

Vulnerability from cvelistv5 – Published: 2022-01-01 18:47 – Updated: 2026-10-14 12:03

Summary

Severity

8.8 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-23 13:29 UTC

CWE

n/a
CWE-682 - Incorrect Calculation

Assigner

mitre CNA under the mitre root

CNA scorecard E 28/100 over 2347 records in the last 180 days details

References

11 references

URL	Tags
https://github.com/libexpat/libexpat/issues/531	x_refsource_MISC
https://github.com/libexpat/libexpat/pull/534	x_refsource_MISC
https://bugzilla.mozilla.org/show_bug.cgi?id=1217609	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2022/01/17/3	mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-2022012…	x_refsource_CONFIRM
https://www.tenable.com/security/tns-2022-05	x_refsource_CONFIRM
https://www.debian.org/security/2022/dsa-5073	vendor-advisoryx_refsource_DEBIAN
https://cert-portal.siemens.com/productcert/pdf/s…	x_refsource_CONFIRM
https://security.gentoo.org/glsa/202209-24	vendor-advisoryx_refsource_GENTOO
https://cert-portal.siemens.com/productcert/html/…
https://cert-portal.siemens.com/productcert/html/…

Impacted products

3 products

Vendor	Product	Version
Siemens	SIMATIC S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)
Siemens	SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)
Siemens	SIPLUS S7-1500 CPU 1518-4 PN/DP MFP	Affected: V3.1.0 , < V3.1.5 (custom)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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