CVE-2023-39326
Published: 6 December 2023
A malicious HTTP sender can use chunk extensions to cause a receiver reading from a request or response body to read many more bytes from the network than are in the body. A malicious HTTP client can further exploit this to cause a server to automatically read a large amount of data (up to about 1GiB) when a handler fails to read the entire body of a request. Chunk extensions are a little-used HTTP feature which permit including additional metadata in a request or response body sent using the chunked encoding. The net/http chunked encoding reader discards this metadata. A sender can exploit this by inserting a large metadata segment with each byte transferred. The chunk reader now produces an error if the ratio of real body to encoded bytes grows too small.
Priority
Status
Package | Release | Status |
---|---|---|
golang-1.19 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of standard support)
|
focal |
Does not exist
|
|
jammy |
Does not exist
|
|
lunar |
Ignored
(end of life, was needs-triage)
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Needs triage
|
|
xenial |
Ignored
(end of standard support)
|
|
golang-1.20 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of standard support)
|
focal |
Released
(1.20.3-1ubuntu0.1~20.04.1)
|
|
jammy |
Released
(1.20.3-1ubuntu0.1~22.04.1)
|
|
lunar |
Released
(1.20.3-1ubuntu0.2)
|
|
mantic |
Released
(1.20.8-1ubuntu0.23.10.1)
|
|
noble |
Does not exist
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Released
(1.20.12-1)
|
|
xenial |
Ignored
(end of standard support)
|
|
golang-1.21 Launchpad, Ubuntu, Debian |
bionic |
Ignored
(end of standard support)
|
focal |
Released
(1.21.1-1~ubuntu20.04.2)
|
|
jammy |
Released
(1.21.1-1~ubuntu22.04.2)
|
|
lunar |
Released
(1.21.1-1~ubuntu23.04.2)
|
|
mantic |
Released
(1.21.1-1ubuntu0.23.10.1)
|
|
noble |
Not vulnerable
(1.21.5-1)
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Released
(1.21.5-1)
|
|
xenial |
Ignored
(end of standard support)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.3 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | Low |
Integrity impact | None |
Availability impact | None |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |
References
- https://go.dev/issue/64433
- https://github.com/golang/go/commit/ec8c526e4be720e94b98ca509e6364f0efaf28f7 (go1.21.5)
- https://github.com/golang/go/commit/6446af942e2e2b161c4ec1b60d9703a2b55dc4dd (go1.20.12)
- https://ubuntu.com/security/notices/USN-6574-1
- https://www.cve.org/CVERecord?id=CVE-2023-39326
- NVD
- Launchpad
- Debian