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NVD / CVE Program· CNA cisco

CVE-2024-20506: ClamAV Privilege Handling Escalation Vulnerability

MediumCVSS 6.1 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 24/100)

  • 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: 0.31% (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: Azure Linux 3.0 ARM 1.0.7-1; Azure Linux 3.0 x64 1.0.7-1; CBL Mariner 2.0 ARM 1.0.7-1.

Low priority for now. Upgrade to Azure Linux 3.0 ARM 1.0.7-1; Azure Linux 3.0 x64 1.0.7-1; CBL Mariner 2.0 ARM 1.0.7-1 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

A vulnerability in the ClamD service module of Clam AntiVirus (ClamAV) versions 1.4.0, 1.3.2 and prior versions, all 1.2.x versions, 1.0.6 and prior versions, all 0.105.x versions, all 0.104.x versions, and 0.103.11 and all prior versions could allow an authenticated, local attacker to corrupt critical system files. The vulnerability is due to allowing the ClamD process to write to its log file while privileged without checking if the logfile has been replaced with a symbolic link. An attacker could exploit this vulnerability if they replace the ClamD log file with a symlink to a critical system file and then find a way to restart the ClamD process. An exploit could allow the attacker to corrupt a critical system file by appending ClamD log messages after restart.

Published
Sep 4, 2024
Updated
Jun 17, 2026
EPSS
0.3% · 25th percentile

Report tools

JSON

Action score

24

Monitor

Low priority for now.

CVSS
24 / 40 · 6.1 / 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
6.1
CNA · cisco
6.1
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-2024-20506

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

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 ClamAV

    • 1.4.0, 1.3.2, 1.0.6, 1.0.5, 1.0.4, 1.0.3, 1.0.2, 1.0.1, 1.0.0, 1.2.x, 0.105.x, 0.104.x … (+12)affected
Affected versions · NVD (4)

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

  • clamav clamavbefore 0.103.12
  • clamav clamav0.104.0 and later · before 1.0.7
  • clamav clamav1.2.0 and later · before 1.3.2
  • clamav clamav1.4.0

Package-level exposure

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

EcosystemPackageAffected rangeFix
Alpine:v3.21clamavfrom 0.104.0 · before 1.3.2-r01.3.2-r0
Debian:11clamavbefore 1.0.7+dfsg-1~deb11u11.0.7+dfsg-1~deb11u1
Debian:12clamavbefore 1.0.7+dfsg-1~deb12u11.0.7+dfsg-1~deb12u1
Debian:13clamavbefore 1.4.1+dfsg-11.4.1+dfsg-1
openSUSE:Leap 15.5clamavbefore 0.103.12-150000.3.53.10.103.12-150000.3.53.1
openSUSE:Leap 15.6clamavbefore 1.4.2-150600.18.6.11.4.2-150600.18.6.1
openSUSE:Leap 15.6clamavbefore 0.103.12-150600.18.3.10.103.12-150600.18.3.1
openSUSE:Tumbleweedclamavbefore 1.4.1-1.11.4.1-1.1
SUSE:Linux Enterprise Micro 5.5clamavbefore 1.4.2-150200.8.3.11.4.2-150200.8.3.1
SUSE:Linux Enterprise Module for Basesystem 15 SP5clamavbefore 0.103.12-150000.3.53.10.103.12-150000.3.53.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6clamavbefore 1.4.2-150600.18.6.11.4.2-150600.18.6.1
SUSE:Linux Enterprise Module for Basesystem 15 SP6clamavbefore 0.103.12-150600.18.3.10.103.12-150600.18.3.1
SUSE:Linux Enterprise Server 12 SP5clamavbefore 0.103.12-3.33.10.103.12-3.33.1
SUSE:Linux Enterprise Server 12 SP5-LTSSclamavbefore 1.4.2-3.36.11.4.2-3.36.1

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-2024-20380Apr 18, 2024 · ClamAV HTML Parser Denial of Service Vulnerability
    30Monitor
  • ← EarlierCVE-2024-20505Sep 4, 2024 · ClamAV Memory Handling DoS
    30Monitor
  • Later →CVE-2025-20128Jan 22, 2025 · ClamAV OLE2 File Format Decryption Denial of Service Vulnerability
    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
Azure Linux 3.0 ARM1.0.7-1 · clamavMicrosoft (MSRC)
Azure Linux 3.0 x641.0.7-1 · clamavMicrosoft (MSRC)
CBL Mariner 2.0 ARM1.0.7-1 · clamavMicrosoft (MSRC)
CBL Mariner 2.0 x641.0.7-1 · clamavMicrosoft (MSRC)
alpine:clamav1.3.2-r0 · Alpine:v3.21Package registry (OSV)
debian:clamav1.0.7+dfsg-1~deb12u1 · Debian:12Package registry (OSV)
opensuse:clamav0.103.12-150000.3.53.1 · openSUSE:Leap 15.5Package registry (OSV)
suse:clamav0.103.12-150000.3.53.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP5Package registry (OSV)
suse:clamav0.103.12-3.33.1 · SUSE:Linux Enterprise Server 12 SP5Package 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

  • 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
low · data or configuration can be modified
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
Low
Availability impact
High

Weakness class (CWE)

CWE-754 · Improper Check for Unusual or Exceptional Conditions

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/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 (1 more)

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

All records