ClamAV DoS vulnerability on PDF parsing

Advisory ID CVE Number Date discovered Severity Advisory revision
STORM-2021-017 CVE-2021-1404 04/09/2021 medium v1

Vulnerability details

ClamAV crash caused by malformed PDF file parsing.

Impacted products

Stormshield Network Security medium SNS is impacted


Version Date Description
v1  05/27/2021 Initial release


Stormshield Network Security

CVSS v3.1 Overall Score: 5.3      


Impacted version

The parsing of some PDF malformed files can lead to the crash of ClamAV service.

  • SNS 3.0.0 to 3.7.19
  • SNS 3.8.0 to 3.11.7
  • SNS 4.1.5
  • SNS 4.2.1

Workaround solution


There is no workaround solution.

The 3.7.20, 3.11.8, 4.1.6 and 4.2.2 update fixes this vulnerability.

Attack Vector Attack Complexity Privileges Required User Interaction Scope Confidentiality Impact Integrity Impact Availability impact
Network Low None None Unchanged None None Low
CVSS Base score: 5.3 CVSS Vector: (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)
Exploit Code Maturity Remediation Level Report Confidence
Unproven that exploit exists Official fix Confirmed
CVSS Temporal score: 4.6 CVSS Vector: (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)
Confidentiality Requirement Integrity Requirement Availability Requirement
High High High
CVSS Environmental score: 5.3 CVSS Vector: (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C/CR:H/IR:H/AR:H/MAV:X/MAC:X/MPR:X/MUI:X/MS:X/MC:X/MI:X/MA:X)