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NVD / CVE Program· CNA cisco

CVE-2022-20796: ClamAV Truncated File Denial of Service Vulnerability Affecting Cisco Products: April 2022

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.38% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • 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 May 4, 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 Clam AntiVirus (ClamAV) versions 0.103.4, 0.103.5, 0.104.1, and 0.104.2 could allow an authenticated, local attacker to cause a denial of service condition on an affected device. For a description of this vulnerability, see the ClamAV blog.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 4, 2022
Updated
Jun 17, 2026
EPSS
0.3% · 32th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · cisco
6.5
1.0 point gap

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

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-2022-20796

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

Affected versions

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

  • cisco secure endpointbefore 1.16.3
  • cisco secure endpoint1.18.0 and later · before 1.18.2
  • cisco secure endpointbefore 7.5.5
  • cisco secure endpointbefore 1.17.2
  • clamav clamav0.103.4
  • clamav clamav0.103.5
  • clamav clamav0.104.1
  • clamav clamav0.104.2
  • debian debian linux9.0
  • fedoraproject fedora34
  • fedoraproject fedora35
  • fedoraproject fedora36

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

Package-level exposure

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

EcosystemPackageAffected rangeFix
Alpine:v3.12clamavbefore 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 p
    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-2022-20771May 4, 2022 · ClamAV TIFF File Parsing Denial of Service Vulnerability Affecting Cisco Products: April 2022
    32Monitor
  • ← EarlierCVE-2022-20785May 4, 2022 · ClamAV HTML Scanning Memory Leak Vulnerability Affecting Cisco Products: April 2022
    32Monitor
  • Later →CVE-2022-20792Aug 10, 2022 · A vulnerability in the regex module used by the signature database load module of Clam AntiVirus (ClamAV) versions 0.104.0 through 0.104.2 a
    31Monitor

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.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • 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
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-822 · Untrusted Pointer Dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

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

All records