SB20191210104 - Multiple vulnerabilities in envoy

Description

This security bulletin contains information about 2 vulnerabilities.

1) Input validation error (CVE-ID: CVE-2019-18838)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper input validation in host header request handling when processing requests without a Host header. A remote attacker can send a specially crafted request to cause a denial of service.

2) Heap-based buffer overflow (CVE-ID: CVE-2019-18801)

CWE-ID: CWE-122 - Heap-based Buffer Overflow

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to a heap-based buffer overflow in the :method header handling when processing requests. A remote attacker can send a specially crafted request to cause a denial of service.

Remediation

Install update from vendor's website.

References

• https://github.com/envoyproxy/envoy/security/advisories/GHSA-f2rv-4w6x-rwhc
• https://github.com/envoyproxy/envoy/security/advisories/GHSA-gxvv-x4p2-rppp