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CVE-2018-0237: A vulnerability in the file type detection mechanism of the Cisco Advanced Malware Protection (AMP) for End...

A vulnerability in the file type detection mechanism of the Cisco Advanced Malware Protection (AMP) for Endpoints macOS Connector could allow an unauthenticated, remote attacker to bypass malware detection. The vulnerability occurs because the software relies on only the file extension for detecting DMG files. An attacker could exploit this vulnerability by sending a DMG file with a nonstandard extension to a device that is running an affected AMP for Endpoints macOS Connector. An exploit could allow the attacker to bypass configured malware detection. Cisco Bug IDs: CSCve34034.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Cisco AMP for Endpoints on macOS could miss malicious DMG disk images if the file used an unusual extension. The issue matters because a security control could be bypassed before detection, but the provided sources do not show known active exploitation or a CVSS score.

Executive priority

Treat this as a targeted control-bypass risk for macOS fleets, not a broad emergency. Prioritize if Cisco AMP is a key malware control for employees handling downloaded files or email attachments.

Technical view

CVE-2018-0237 is a CWE-20 input validation issue in Cisco AMP for Endpoints macOS Connector. The connector reportedly relied only on file extension to identify DMG files, allowing a remote unauthenticated attacker to send a DMG with a nonstandard extension and bypass configured malware detection.

Likely exposure

Exposure is limited to environments running affected Cisco AMP for Endpoints macOS Connector deployments. The supplied data does not identify specific affected or fixed versions, so teams must compare deployed connector versions against Cisco's advisory.

Exploitation context

The source bundle describes a bypass scenario involving delivery of a DMG file with a nonstandard extension. It does not identify public exploitation, KEV listing, exploit maturity, or observed campaigns.

Researcher notes

The strongest evidence is Cisco's description of extension-based DMG detection. Missing details include CVSS, affected release ranges, fixed versions, and exploit observations. Avoid extrapolating impact to other Cisco AMP platforms without vendor evidence.

Mitigation direction

  • Check Cisco's advisory for affected and fixed connector versions.
  • Upgrade or remediate using Cisco-published guidance where applicable.
  • Prioritize macOS endpoints using Cisco AMP for Endpoints Connector.
  • Increase scrutiny of disk-image attachments and downloads pending remediation.

Validation and detection

  • Inventory Cisco AMP for Endpoints macOS Connector deployments.
  • Compare installed connector versions against Cisco's advisory.
  • Review security logs for disk-image files using unusual extensions.
  • Confirm detection policy covers disk-image content, not only filename extension.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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CVE-2018-0237 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/aCisco AMP for EndpointsCisco AMP for EndpointsListed
Weakness

CWE details

CWE-20

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.