Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS00djd4LXBxeGYtY3g3bc4AA6pf

net/http, x/net/http2: close connections when receiving too many headers

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.

Permalink: https://github.com/advisories/GHSA-4v7x-pqxf-cx7m
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS00djd4LXBxeGYtY3g3bc4AA6pf
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: 28 days ago
Updated: 7 days ago

CVSS Score: 5.3
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Identifiers: GHSA-4v7x-pqxf-cx7m, CVE-2023-45288
References:

• https://nvd.nist.gov/vuln/detail/CVE-2023-45288
• https://go.dev/cl/576155
• https://go.dev/issue/65051
• https://groups.google.com/g/golang-announce/c/YgW0sx8mN3M
• https://pkg.go.dev/vuln/GO-2024-2687
• https://nowotarski.info/http2-continuation-flood-technical-details
• https://security.netapp.com/advisory/ntap-20240419-0009
• https://lists.fedoraproject.org/archives/list/[email protected]/message/QRYFHIQ6XRKRYBI2F5UESH67BJBQXUPT
• https://github.com/advisories/GHSA-4v7x-pqxf-cx7m

Blast Radius: 28.8

Affected Packages