HTTP/2 rapid reset can cause excessive work in net/http
A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing. With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection. This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2. The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function.
GO-2023-2102
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: osv:GO-2023-2102
stdlib
Source reference: /affected/0/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 1.20.10
Source reference:
/affected/0/ranges1.21.3Source reference:
/affected/0/ranges - Prerequisites
- Not stated in this record
golang.org/x/net
Source reference: /affected/1/package/name
- Affected versions
- Not stated in this record
- Fixed versions
- 0.17.0
Source reference:
/affected/1/ranges - Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.20.10"
},
{
"introduced": "1.21.0-0"
},
{
"fixed": "1.21.3"
}
]
}
],
"package": {
"name": "stdlib",
"purl": "pkg:golang/stdlib",
"ecosystem": "Go"
},
"database_specific": {
"source": "https://vuln.go.dev/ID/GO-2023-2102.json"
},
"ecosystem_specific": {
"imports": [
{
"path": "net/http",
"symbols": [
"ListenAndServe",
"ListenAndServeTLS",
"Serve",
"ServeTLS",
"Server.ListenAndServe",
"Server.ListenAndServeTLS",
"Server.Serve",
"Server.ServeTLS",
"http2Server.ServeConn",
"http2serverConn.processHeaders",
"http2serverConn.runHandler",
"http2serverConn.serve",
"http2serverConn.upgradeRequest"
]
}
]
}
},
{
"ranges": [
{
"type": "SEMVER",
"events": [
{
"introduced": "0"
},
{
"fixed": "0.17.0"
}
]
}
],
"package": {
"name": "golang.org/x/net",
"purl": "pkg:golang/golang.org/x/net",
"ecosystem": "Go"
},
"database_specific": {
"source": "https://vuln.go.dev/ID/GO-2023-2102.json"
},
"ecosystem_specific": {
"imports": [
{
"path": "golang.org/x/net/http2",
"symbols": [
"Server.ServeConn",
"serverConn.processHeaders",
"serverConn.runHandler",
"serverConn.serve",
"serverConn.upgradeRequest"
]
}
]
}
}
]- Related CVEs
- CVE-2023-39325
Source reference:
/aliases
Publisher severity
No explicit severity was provided.
- Event
- #22382 · Revision 1
- Added to Heist Feed
- Publisher date