Amazon Linux 2 Security Advisory: ALAS-2024-2555
Advisory Release Date: 2024-05-23 22:04 Pacific
Advisory Updated Date: 2024-05-29 12:00 Pacific
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. (CVE-2023-45288)
Affected Packages:
cni-plugins
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update cni-plugins to update your system.
aarch64:
cni-plugins-1.2.0-1.amzn2.0.6.aarch64
cni-plugins-debuginfo-1.2.0-1.amzn2.0.6.aarch64
src:
cni-plugins-1.2.0-1.amzn2.0.6.src
x86_64:
cni-plugins-1.2.0-1.amzn2.0.6.x86_64
cni-plugins-debuginfo-1.2.0-1.amzn2.0.6.x86_64