Vulnerability identifier: #VU31036
Vulnerability risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Istio
Web applications /
Other software
Vendor: Istio
Description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
Istio before 1.2.2 mishandles certain access tokens, leading to "Epoch 0 terminated with an error" in Envoy. This is related to a jwt_authenticator.cc segmentation fault.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Istio: 1.2.1
External links
http://github.com/istio/istio.io/pull/4555
http://github.com/istio/istio/issues/15084
http://istio.io/about/notes/
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.