SB2021102905 - Multiple vulnerabilities in Antenna House Office Server Document Converter

Description

This security bulletin contains information about 2 vulnerabilities.

1) XML External Entity injection (CVE-ID: CVE-2021-20838)

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/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 insufficient validation of user-supplied XML input in the PDF convert server. A remote attacker can pass a specially crafted XML code to the affected application and cause a denial of service condition on the target system.

2) XML External Entity injection (CVE-ID: CVE-2021-20839)

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:L/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 insufficient validation of user-supplied XML input in the other servers. A remote attacker can pass a specially crafted XML code to the affected application and cause a denial of service condition on the other servers.

Remediation

Install update from vendor's website.

References

• https://jvn.jp/en/jp/JVN33453839/index.html
• https://www.antenna.co.jp/news/2021/osdc72-20211027.html