Announcing Istio 1.1.13
We’re pleased to announce the availability of Istio 1.1.13. Please see below for what’s changed.
Security update
This release contains fixes for the security vulnerabilities described in our August 13th, 2019 blog post. Specifically:
ISTIO-SECURITY-2019-003: An Envoy user reported publicly an issue (c.f. Envoy Issue 7728) about regular expressions matching that crashes Envoy with very large URIs.
- CVE-2019-14993: After investigation, the Istio team has found that this issue could be leveraged for a DoS attack in Istio, if users are employing regular expressions in some of the Istio APIs:
JWT
,VirtualService
,HTTPAPISpecBinding
,QuotaSpecBinding
.
ISTIO-SECURITY-2019-004: Envoy, and subsequently Istio are vulnerable to a series of trivial HTTP/2-based DoS attacks:
- CVE-2019-9512: HTTP/2 flood using
PING
frames and queuing of responsePING
ACK frames that results in unbounded memory growth (which can lead to out of memory conditions). - CVE-2019-9513: HTTP/2 flood using PRIORITY frames that results in excessive CPU usage and starvation of other clients.
- CVE-2019-9514: HTTP/2 flood using
HEADERS
frames with invalid HTTP headers and queuing of responseRST_STREAM
frames that results in unbounded memory growth (which can lead to out of memory conditions). - CVE-2019-9515: HTTP/2 flood using
SETTINGS
frames and queuing ofSETTINGS
ACK frames that results in unbounded memory growth (which can lead to out of memory conditions). - CVE-2019-9518: HTTP/2 flood using frames with an empty payload that results in excessive CPU usage and starvation of other clients.
- See this security bulletin for more information
Nothing else is included in this release except for the above security fixes.