SB2023060840 - Multiple vulnerabilities in envoy 

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Main Vulnerability Database SB2023060840

SB2023060840 - Multiple vulnerabilities in envoy

Published: June 8, 2023

Security Bulletin ID SB2023060840
Severity
Medium
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 60% Low 40%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 secuirty vulnerabilities.


1) Reliance on undefined behavior (CVE-ID: CVE-2023-30624)

The vulnerability allows a remote attacker to influence application's behavior.

The vulnerability exists due to LLVM-level undefined behavior when managing per-instance state. A remote attacker can leverage this vulnerability to cause runtime-level issues when compiled with LLVM 16, which can influence application behavior.


2) Buffer Underwrite ('Buffer Underflow') (CVE-ID: CVE-2023-31130)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a buffer underflow when using certain IPv6 addresses, such as 0::00:00:00/2". A local privileged user can trigger a boundary error and crash the service.


3) Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) (CVE-ID: CVE-2023-31147)

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to usage of a rand() function in case /dev/urandom or RtlGenRandom() are unavailable. A remote attacker can perform spoofing attack.


4) Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) (CVE-ID: CVE-2023-31124)

The vulnerability allows a remote attacker to perform spoofing attack.

The vulnerability exists due to an error when cross-compiling c-ares and using the autotools build system. As a result, the CARES_RANDOM_FILE is not be set, which results in usage of a rand() function as a fallback, leading to weak entropy.


5) Input validation error (CVE-ID: CVE-2023-32067)

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 processing DNS responses. A remote attacker can send a specially crafted DNS response to the application and perform a denial of service (DoS) attack.


Remediation

Install update from vendor's website.

References