SB2021111140 - Multiple vulnerabilities in Cloudflare cfrpki

Main Vulnerability Database SB2021111140

SB2021111140 - Multiple vulnerabilities in Cloudflare cfrpki

Published: November 11, 2021 Updated: June 1, 2022

Security Bulletin ID SB2021111140

Severity

High

Patch available

YES

Number of vulnerabilities 6

Exploitation vector Remote access

Highest impact Code execution

Breakdown by Severity

Low
Medium
High
Critical

Description

This security bulletin contains information about 6 secuirty vulnerabilities.

1) Resource exhaustion (CVE-ID: CVE-2021-3912)

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

The vulnerability exists due to OctoRPKI tries to load the entire contents of a repository in memory. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

2) Unchecked Return Value (CVE-ID: CVE-2021-3911)

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

The vulnerability exists due to unchecked return value when processing ROA. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

3) Input validation error (CVE-ID: CVE-2021-3910)

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

The vulnerability exists due to insufficient validation of user-supplied input when encountering a repository that returns an invalid ROA (just an encoded NUL () character). A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.

4) Resource exhaustion (CVE-ID: CVE-2021-3909)

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

The vulnerability exists due to OctoRPKI does not limit the length of a connection. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

5) Resource exhaustion (CVE-ID: CVE-2021-3908)

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

The vulnerability exists due to OctoRPKI does not limit the depth of a certificate chain. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.

6) Path traversal (CVE-ID: CVE-2021-3907)

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

The vulnerability exists due to OctoRPKI does not escape a URI with a filename containing "..". A remote attacker can send a specially crafted HTTP request and execute arbitrary code on the system.

Remediation

Install update from vendor's website.

References