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.
[
{
"cpes": [
"cpe:2.3:a:go_standard_library:net\\/http:*:*:*:*:*:*:*:*"
],
"vendor": "go_standard_library",
"product": "net\\/http",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.21.9",
"versionType": "custom"
},
{
"status": "affected",
"version": "1.22.0-0",
"lessThan": "1.22.2",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
},
{
"cpes": [
"cpe:2.3:a:golang:http2:*:*:*:*:*:*:*:*"
],
"vendor": "golang",
"product": "http2",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "0.23.0",
"versionType": "custom"
}
],
"defaultStatus": "unknown"
}
]
www.openwall.com/lists/oss-security/2024/04/03/16
www.openwall.com/lists/oss-security/2024/04/05/4
go.dev/cl/576155
go.dev/issue/65051
groups.google.com/g/golang-announce/c/YgW0sx8mN3M
lists.fedoraproject.org/archives/list/[email protected]/message/QRYFHIQ6XRKRYBI2F5UESH67BJBQXUPT/
pkg.go.dev/vuln/GO-2024-2687
security.netapp.com/advisory/ntap-20240419-0009/