5.5
MEDIUM
CVE-2021-27506
Storsmshield Network Security DoS PNG Parsing Vulnerability
Description

The ClamAV Engine (version 0.103.1 and below) component embedded in Storsmshield Network Security (SNS) is subject to DoS in case of parsing of malformed png files. This affect Netasq versions 9.1.0 to 9.1.11 and SNS versions 1.0.0 to 4.2.0. This issue is fixed in SNS 3.7.19, 3.11.7 and 4.2.1.

INFO

Published Date :

March 19, 2021, 3:15 p.m.

Last Modified :

Aug. 20, 2024, 2:58 p.m.

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2021-27506 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Stormshield stormshield_network_security
2 Stormshield network_security
1 Clamav clamav
1 Netasq_project netasq
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-27506.

URL Resource
https://advisories.stormshield.eu/2021-003/ Broken Link Vendor Advisory
https://blog.clamav.net/2021/02/clamav-01031-patch-release.html Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-27506 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-27506 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CPE Deprecation Remap by [email protected]

    Aug. 20, 2024

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:stormshield:network_security:*:*:*:*:*:*:*:* versions from (including) 1.0 from (including) 4.2.0 OR *cpe:2.3:a:stormshield:stormshield_network_security:*:*:*:*:*:*:*:* versions from (including) 1.0 from (including) 4.2.0
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Jul. 01, 2022

    Action Type Old Value New Value
    Changed CPE Configuration OR *cpe:2.3:a:stormshield:network_security:*:*:*:*:*:*:*:* versions from (including) 1.0 up to (including) 4.2.0 OR *cpe:2.3:a:netasq_project:netasq:*:*:*:*:*:*:*:* versions from (including) 9.1.0 up to (including) 9.1.11 *cpe:2.3:a:stormshield:network_security:*:*:*:*:*:*:*:* versions from (including) 1.0 up to (including) 4.2.0
  • CVE Modified by [email protected]

    Apr. 12, 2021

    Action Type Old Value New Value
    Changed Description The ClamAV Engine (Version 0.103.1 and below) embedded in Storsmshield Network Security (1.0 to 4.1.5) is subject to DoS in case of parsing of malformed png files. The ClamAV Engine (version 0.103.1 and below) component embedded in Storsmshield Network Security (SNS) is subject to DoS in case of parsing of malformed png files. This affect Netasq versions 9.1.0 to 9.1.11 and SNS versions 1.0.0 to 4.2.0. This issue is fixed in SNS 3.7.19, 3.11.7 and 4.2.1.
  • Initial Analysis by [email protected]

    Mar. 24, 2021

    Action Type Old Value New Value
    Added CVSS V2 Metadata Victim must voluntarily interact with attack mechanism
    Added CVSS V2 NIST (AV:N/AC:M/Au:N/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
    Changed Reference Type https://advisories.stormshield.eu/2021-003/ No Types Assigned https://advisories.stormshield.eu/2021-003/ Broken Link, Vendor Advisory
    Changed Reference Type https://blog.clamav.net/2021/02/clamav-01031-patch-release.html No Types Assigned https://blog.clamav.net/2021/02/clamav-01031-patch-release.html Vendor Advisory
    Added CWE NIST NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:a:stormshield:network_security:*:*:*:*:*:*:*:* versions from (including) 1.0 up to (including) 4.2.0
    Added CPE Configuration OR *cpe:2.3:a:clamav:clamav:*:*:*:*:*:*:*:* versions up to (including) 0.103.1
  • CVE Modified by [email protected]

    Mar. 22, 2021

    Action Type Old Value New Value
    Changed Description In Stormshield Network Security (SNS) 1.0 through 4.2.0, the parsing of some malformed files can lead to the crash of ClamAV service causing a Denial of Service. The ClamAV Engine (Version 0.103.1 and below) embedded in Storsmshield Network Security (1.0 to 4.1.5) is subject to DoS in case of parsing of malformed png files.
    Added Reference https://blog.clamav.net/2021/02/clamav-01031-patch-release.html [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-27506 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-27506 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.06 }} 0.00%

score

0.25721

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability