SB2023040516 - Multiple vulnerabilities in Envoy 

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Main Vulnerability Database SB2023040516

SB2023040516 - Multiple vulnerabilities in Envoy

Published: April 5, 2023 Updated: April 6, 2023

Security Bulletin ID SB2023040516
Severity
High
Patch available
YES
Number of vulnerabilities 6
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

High 33% Medium 67%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 6 secuirty vulnerabilities.


1) Input validation error (CVE-ID: CVE-2023-27496)

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 a redirect url without a state param is received in the oauth filter. A remote attacker can pass specially crafted input to the application and perform a denial of service (DoS) attack.


2) Input validation error (CVE-ID: CVE-2023-27487)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to insufficient validation of user-supplied input in the "header x-envoy-original-path". A remote attacker can gain access to sensitive information on the system.


3) Input validation error (CVE-ID: CVE-2023-27491)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to insufficient validation of user-supplied input within the HTTP/2 and HTTP/3 downstream headers. A remote attacker can bypass the security policies.


4) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2023-27492)

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

The vulnerability exists when a large request body is processed in Lua filter. A remote user can pass specially crafted input to the application and perform a denial of service (DoS) attack.


5) Input validation error (CVE-ID: CVE-2023-27493)

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the affected application does not sanitize or escape request properties when generating request headers. A remote attacker can cause request smuggling and bypass of security policies.


6) Input validation error (CVE-ID: CVE-2023-27488)

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to insufficient validation of user-supplied input when "failure_mode_allow: true" is configured for ext_authz filter. A remote attacker can pass specially crafted input to the application and gain elevated privileges on the target system.


Remediation

Install update from vendor's website.

References