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Secure EndpointApplication · Cisco

CVE-2022-20771

HIGH · 7.5 CVSS v3.1 Published 2022-05-04
Fix available
A fix is available. Upgrade to 1.16.3 / 1.17.2 or later.
See remediation →
84/100
Remediation priority · High
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
On April 20, 2022, the following vulnerability in the ClamAV scanning library versions 0.103.5 and earlier and 0.104.2 and earlier was disclosed: A vulnerability in the TIFF file parser of Clam AntiVirus (ClamAV) versions 0.104.0 through 0.104.2 and LTS version 0.103.5 and prior versions could allow an unauthenticated, remote attacker to cause a denial of service condition on an affected device. For a description of this vulnerability, see the ClamAV blog. This advisory will be updated as additional information becomes available.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · moderate confidence

A denial-of-service vulnerability exists in the TIFF file parser component of ClamAV versions 0.104.0-0.104.2 and 0.103.5 and prior. An unauthenticated remote attacker can craft a malicious TIFF file that, when processed by the ClamAV scanning engine, causes the service to become unresponsive or crash.

MitigationUpgrade ClamAV to version 0.104.3 or later (or the latest LTS patch for version 0.103) to remediate this vulnerability. If immediate upgrading is not feasible, consider disabling TIFF scanning capability or implementing file-type-based pre-filtering at mail gateways to reject TIFF attachments until the patch can be applied.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Secure EndpointApplication
Affected:< 1.16.3< 1.17.2< 7.5.5>= 1.18.0, < 1.18.2
FedoraOperating system
Affected:= 34= 35= 36
Debian LinuxOperating system
Affected:= 9.0
ClamavApplication
Affected:<= 0.103.5>= 0.104.0, <= 0.104.2

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Check installed ClamAV version
    Run `clamd --version` or `clamav-milter --version` to determine the exact version of ClamAV installed on the system
    Affected if The installed version is 0.103.5 or lower, or falls within 0.104.0 to 0.104.2 inclusive
  2. Verify TIFF scanning capability is enabled
    Inspect the ClamAV configuration file (typically /etc/clamd.conf or /etc/clamd/clamd.conf) for directives related to TIFF handling. Look for `ScanTIFF` set to `true` or the absence of TIFF in a disabled scanning list
    Affected if TIFF scanning is enabled (TIFF files will be parsed by the engine)
  3. Check Fedora system version
    Run `cat /etc/fedora-release` or `rpm -q fedora-release` to identify the Fedora version
    Affected if The system runs Fedora 34, 35, or 36 with a vulnerable ClamAV package installed
  4. Check Debian system version
    Run `cat /etc/debian_version` or `lsb_release -a` to identify the Debian version
    Affected if The system runs Debian 9.0 with a vulnerable ClamAV package installed
  5. Check Cisco Secure Endpoint version
    Use the Cisco Secure Endpoint console or run `ampcli --version` if the connector is installed, to determine the installed connector version
    Affected if The installed version is less than 1.16.3, or less than 1.17.2, or less than 7.5.5, or falls between 1.18.0 and 1.18.2

The environment is affected if ClamAV version 0.103.5 or lower, or between 0.104.0 and 0.104.2 is installed AND TIFF scanning is enabled on the system (or for Cisco Secure Endpoint, if the version falls within the affected ranges listed).

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 1.16.3 / 1.17.2 / 1.18.2 or later
Fixed in 1.16.31.17.21.18.2
Interim mitigation

Upgrade ClamAV to version 0.104.3 or later (or the latest LTS patch for version 0.103) to remediate this vulnerability. If immediate upgrading is not feasible, consider disabling TIFF scanning capability or implementing file-type-based pre-filtering at mail gateways to reject TIFF attachments until the patch can be applied.

Recommended fix High confidence

ClamAV 0.103.6+ or 0.104.3+ (or latest stable release)

  1. Identify the currently installed ClamAV version using 'clamd --version' or 'clamscan --version'
  2. For ClamAV 0.103.x versions: Upgrade to ClamAV 0.103.6 or later
  3. For ClamAV 0.104.x versions: Upgrade to ClamAV 0.104.3 or later
  4. For optimal security, consider upgrading to the latest stable ClamAV release (currently 0.105.x or higher)
  5. After upgrade, verify the new version is installed correctly with 'clamscan --version'
  6. Test the updated ClamAV installation by running a scan on a test TIFF file to confirm the TIFF parser functions properly
Caveat Minor: Upgrading between patch versions typically has low risk, but test in non-production environment first to ensure compatibility with any custom configurations or integration scripts

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Secure Endpoint Scoped from the published advisory
  • Consultation2.0 h
  • Implementation1.0 h
  • Testing4.0 h
  • Review / QA1.0 h
8.0 hours of engineering $1,360
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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2022-20771 in production — separate from our analysis above.

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data