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NVD / CVE Program· CNA cisco

CVE-2022-20785: ClamAV HTML Scanning Memory Leak Vulnerability Affecting Cisco Products: April 2022

HighCVSS 7.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 32/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 7.1% (FIRST EPSS); higher than 94.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: clamav (Alpine:v3.12) 0.103.6-r0; clamav (Debian:12) 0.103.6+dfsg-1; clamav (Debian:9) 0.103.6+dfsg-0+deb9u1.

Low priority for now. Upgrade to clamav (Alpine:v3.12) 0.103.6-r0; clamav (Debian:12) 0.103.6+dfsg-1; clamav (Debian:9) 0.103.6+dfsg-0+deb9u1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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 HTML 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.

Published
May 4, 2022
Updated
Jun 17, 2026
EPSS
7.1% · 94th percentile

Report tools

JSON

Action score

32

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
2 / 30 · 7.1%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.5
CNA · cisco
7.5
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2022-20785

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
clamavclamav
ciscosecure endpoint
fedoraprojectfedora
debiandebian linux

Versions reported by the vendor

Affected version ranges reported by the assigning authority (cisco). Independent of NVD's CPE analysis and usually ahead of it.

  • Cisco Cisco AMP for Endpoints

    • n/aaffected
Affected versions · NVD (11)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • cisco secure endpointbefore 1.17.2
  • cisco secure endpointbefore 7.5.5
  • cisco secure endpoint1.18.0 and later · before 1.18.2
  • cisco secure endpointbefore 1.16.3
  • clamav clamavbefore 0.103.5
  • clamav clamavup to 0.103.5 inclusive
  • clamav clamav0.104.0 and later · before 0.104.2
  • debian debian linux9.0
  • fedoraproject fedora34
  • fedoraproject fedora35
  • fedoraproject fedora36

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Alpine:v3.12clamavfrom 0.104.0 · before 0.103.6-r00.103.6-r0
Debian:12clamavbefore 0.103.6+dfsg-10.103.6+dfsg-1
Debian:9clamavbefore 0.103.6+dfsg-0+deb9u10.103.6+dfsg-0+deb9u1
openSUSE:Leap 15.3clamavbefore 0.103.6-150000.3.38.10.103.6-150000.3.38.1
openSUSE:Tumbleweedclamavbefore 0.103.6-1.10.103.6-1.1
SUSE:Linux Enterprise Module for Basesystem 15 SP3clamavbefore 0.103.6-150000.3.38.10.103.6-150000.3.38.1
SUSE:Linux Enterprise Server 12 SP5clamavbefore 0.103.6-3.18.10.103.6-3.18.1

Same product

clamav: all records

Other highest-scoring records for the same primary product.

  • CVE-2023-20032On Feb 15, 2023, the following vulnerability in the ClamAV scanning library was disclosed: A vulnerability in the HFS+ partition file…
    48Plan
  • CVE-2024-20328ClamAV VirusEvent File Processing Command Injection Vulnerability
    46Plan
  • CVE-2017-12379ClamAV AntiVirus software versions 0.99.2 and prior contain a vulnerability that could allow an unauthenticated, remote attacker to cause a…
    43Plan

Published before and after this one in the same product

  • ← EarlierCVE-2022-20770May 4, 2022 · ClamAV CHM File Parsing Denial of Service Vulnerability Affecting Cisco Products: April 2022
    32Monitor
  • ← EarlierCVE-2022-20771May 4, 2022 · ClamAV TIFF File Parsing Denial of Service Vulnerability Affecting Cisco Products: April 2022
    32Monitor
  • Later →CVE-2022-20796May 4, 2022 · ClamAV Truncated File Denial of Service Vulnerability Affecting Cisco Products: April 2022
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
alpine:clamav0.103.6-r0 · Alpine:v3.12Package registry (OSV)
debian:clamav0.103.6+dfsg-1 · Debian:12Package registry (OSV)
opensuse:clamav0.103.6-150000.3.38.1 · openSUSE:Leap 15.3Package registry (OSV)
suse:clamav0.103.6-150000.3.38.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP3Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-401 · Missing Release of Memory after Effective Lifetime

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records