Vulnerability-Lookup

GHSA-5327-Q2RH-5X5W

Vulnerability from github – Published: 2025-09-19 21:31 – Updated: 2025-09-19 21:31

Details

MicroWorld eScan AV's update mechanism failed to ensure authenticity and integrity of updates: update packages were delivered and accepted without robust cryptographic verification. As a result, an on-path attacker could perform a man-in-the-middle (MitM) attack and substitute malicious update payloads for legitimate ones. The eScan AV client accepted these substituted packages and executed or loaded their components (including sideloaded DLLs and Java/installer payloads), enabling remote code execution on affected systems. MicroWorld eScan confirmed remediation of the update mechanism on 2023-07-31 but versioning details are unavailable. NOTE: MicroWorld eScan disputes the characterization in third-party reports, stating the issue relates to 2018–2019 and that controls were implemented then.

Severity

9.3 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2024-13990"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-295"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-19T19:15:38Z",
    "severity": "CRITICAL"
  },
  "details": "MicroWorld eScan AV\u0027s update mechanism failed to ensure authenticity and integrity of updates: update packages were delivered and accepted without robust cryptographic verification. As a result, an on-path attacker could perform a man-in-the-middle (MitM) attack and substitute malicious update payloads for legitimate ones. The eScan AV client accepted these substituted packages and executed or loaded their components (including sideloaded DLLs and Java/installer payloads), enabling remote code execution on affected systems. MicroWorld eScan confirmed remediation of the update mechanism on 2023-07-31 but versioning details are unavailable. NOTE: MicroWorld eScan disputes the characterization in third-party reports, stating the issue relates to 2018\u20132019 and that controls were implemented then.",
  "id": "GHSA-5327-q2rh-5x5w",
  "modified": "2025-09-19T21:31:17Z",
  "published": "2025-09-19T21:31:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-13990"
    },
    {
      "type": "WEB",
      "url": "https://arstechnica.com/security/2024/04/hackers-infect-users-of-antivirus-service-that-delivered-updates-over-http"
    },
    {
      "type": "WEB",
      "url": "https://blog.avast.com/leading-the-charge-against-guptiminer"
    },
    {
      "type": "WEB",
      "url": "https://securityaffairs.com/162228/breaking-news/escan-antivirus-mitm-attack.html"
    },
    {
      "type": "WEB",
      "url": "https://thehackernews.com/2024/04/escan-antivirus-update-mechanism.html"
    },
    {
      "type": "WEB",
      "url": "https://www.bleepingcomputer.com/news/security/hackers-hijack-antivirus-updates-to-drop-guptiminer-malware"
    },
    {
      "type": "WEB",
      "url": "https://www.escanav.com/en/about-us/eScan-update-advisory.asp"
    },
    {
      "type": "WEB",
      "url": "https://www.gendigital.com/blog/insights/research/guptiminer-hijacking-antivirus-updates-for-distributing-backdoors-and-casual-mining"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/microworld-escan-av-insecure-update-mechanism-allows-mitm-replacement-of-updates"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2024-13990 (GCVE-0-2024-13990)

Vulnerability from cvelistv5 – Published: 2025-09-19 18:54 – Updated: 2025-11-19 15:58 X_Known Exploited Vulnerability

Title

MicroWorld eScan AV Insecure Update Mechanism Allows Man-in-the-Middle Replacement of Updates

Summary

Severity

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-09-19 20:13 UTC

CWE

CWE-295 - Improper Certificate Validation
CWE-347 - Improper Verification of Cryptographic Signature

Assigner

VulnCheck mitre root

References

8 references

URL	Tags
https://blog.avast.com/leading-the-charge-against…	technical-description
https://www.gendigital.com/blog/insights/research…	technical-descriptionexploit
https://securityaffairs.com/162228/breaking-news/…	media-coverage
https://arstechnica.com/security/2024/04/hackers-…	technical-description
https://www.bleepingcomputer.com/news/security/ha…	media-coverage
https://thehackernews.com/2024/04/escan-antivirus…	media-coverage
https://www.escanav.com/en/about-us/eScan-update-…	vendor-advisorypatch
https://www.vulncheck.com/advisories/microworld-e…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
MicroWorld Technologies	eScan AV	Affected: *

Credits

Milánek and Jan Rubín

Show details on NVD website

JSON

To clipboard

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        "metrics": [
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                "id": "CVE-2024-13990",
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                "role": "CISA Coordinator",
                "timestamp": "2025-09-19T20:13:55.903355Z",
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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.

Detection rules are retrieved from Rulezet.

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.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.