SB2021120328 - Multiple vulnerabilities in Crafter CMS

Description

This security bulletin contains information about 2 vulnerabilities.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2021-23261)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper handling of exceptional conditions. A remote authenticated attacker can override system configuration file and perform a denial of service (DoS) attack.

2) Improper Control of Dynamically-Managed Code Resources (CVE-ID: CVE-2021-23262)

CWE-ID: CWE-913 - Improper Control of Dynamically-Managed Code Resources

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to an unsafe deserialization in the main YAML configuration file. A remote administrator can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Remediation

Install update from vendor's website.

References

• https://docs.craftercms.org/en/3.1/security/advisory.html#cv-2021120104
• https://docs.craftercms.org/en/3.1/security/advisory.html#cv-2021120105