CVE-2020-3247Network attack vector

Arbitrary file execution via tar symlink traversal

Published Apr 15, 2020 · Updated Nov 15, 2024

Directory traversal in Cisco UCS Director 6.7.3.0 and earlier allows remote authenticated users to write or execute arbitrary files. The LargeFileUploadServlet endpoint processes uploaded tar archives without validating user-supplied UNIX symbolic links before file operations. Cisco requires a low-privileged API session, while ZDI reports no authentication requirement; successful exploitation executes code as the Tomcat service.

CVSS severity8.1
High
EPSS probability75.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Directory traversal in Cisco UCS Director 6.7.3.0 and earlier allows remote authenticated users to write or execute arbitrary files. The LargeFileUploadServlet endpoint processes uploaded tar archives without validating user-supplied UNIX symbolic links before file operations. Cisco requires a low-privileged API session, while ZDI reports no authentication requirement; successful exploitation executes code as the Tomcat service.

The record

CVE
CVE-2020-3247
Published
Apr 15, 2020
Updated
Nov 15, 2024
Vendor
ClamAV
Product
Cisco UCS Director
Classifications
CWE-22, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2020CVE publishedPublication date reported by the CVE source.
  2. Nov 15, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=n/a

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

ClamAV · Cisco UCS Directorversion=n/a

Published CVSS scores

8.1Cisco PSIRTCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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