Security information¶
The MKE 3.7.8 patch release focuses exclusively on CVE mitigation. To this end, the following middleware component versions have been upgraded to resolve vulnerabilities in MKE:
[MKE-11477] cri-dockerd 0.3.13
[MKE-11428] Interlock 3.3.13
[MKE-11482] Blackbox Exporter 0.25.0
[MKE-11482] Alert Manager 0.27.0
The following table details the specific CVEs addressed, including which images are affected per CVE.
CVE |
Status |
Image mitigated |
Problem details from upstream |
|---|---|---|---|
Resolved |
|
Internationalized Domain Names in Applications (IDNA) vulnerable to denial of service from specially crafted inputs to idna.encode |
|
Resolved |
|
An attacker may cause an HTTP/2 endpoint to read arbitrary amounts of header data by sending an excessive number of CONTINUATION frames. Maintaining HPACK state requires parsing and processing all HEADERS and CONTINUATION frames on a connection. When a request’s headers exceed MaxHeaderBytes, no memory is allocated to store the excess headers, but they are still parsed. This permits an attacker to cause an HTTP/2 endpoint to read arbitrary amounts of header data, all associated with a request which is going to be rejected. These headers can include Huffman-encoded data which is significantly more expensive for the receiver to decode than for an attacker to send. The fix sets a limit on the amount of excess header frames we will process before closing a connection. |