Information disclosure in envoy - CVE-2021-32779
Published: August 30, 2021
Vulnerability identifier: #VU56149
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-32779
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to incorrectly handling of URI "#fragment" element as part of the path element. A remote attacker can send a specially crafted request and gain unauthorized access to sensitive information on the system.
Affected software
envoy
Istio
servicemesh-proxy (Red Hat package)
servicemesh (Red Hat package)
Istio
servicemesh-proxy (Red Hat package)
servicemesh (Red Hat package)
How to mitigate CVE-2021-32779
Install updates from vendor's website.
envoy - addressed in versions 1.16.5, 1.17.4, 1.18.4, 1.19.1
Istio - addressed in versions 1.9.8, 1.10.4, 1.11.1
servicemesh-proxy (Red Hat package) - addressed in versions 1.1.17-2.el8, 2.0.7-3.el8
servicemesh (Red Hat package) - addressed in versions 1.1.17-3.el8, 2.0.7-3.el8
Istio - addressed in versions 1.9.8, 1.10.4, 1.11.1
servicemesh-proxy (Red Hat package) - addressed in versions 1.1.17-2.el8, 2.0.7-3.el8
servicemesh (Red Hat package) - addressed in versions 1.1.17-3.el8, 2.0.7-3.el8