CVE-2023-45288
HTTP/2 CONTINUATION flood in net/http
Description
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.
How to fix CVE-2023-45288
To remediate CVE-2023-45288, upgrade the affected package to a fixed version below.
- —upgrade to 1.21.9 or later
- —no fix listed
- —no fix listed
- —no fix listed
- —upgrade to 0.23.0 or later
- —upgrade to 0.23.0 or later
- —upgrade to 0.23.0 or later
- —upgrade to 1.21.9 or later
- —upgrade to 1.21.9 or later
Is CVE-2023-45288 being exploited?
Likely — EPSS is 64.9%, placing CVE-2023-45288 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (9)
- from 0, < 1.21.9, >= 1.22.0-0, < 1.22.2
- from 0
- from 0
- from 0
- from 0, < 0.23.0
- from 0, < 0.23.0
- from 0, < 0.23.0
- from 0, < 1.21.9
- from 0, < 1.21.9, >= 1.22.0-0, < 1.22.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |