CVE-2023-38039
Published: 13 September 2023
When curl retrieves an HTTP response, it stores the incoming headers so that they can be accessed later via the libcurl headers API. However, curl did not have a limit in how many or how large headers it would accept in a response, allowing a malicious server to stream an endless series of headers and eventually cause curl to run out of heap memory.
Notes
| Author | Note |
|---|---|
| alexmurray |
Vulnerable code exists since 7.83.0 but was an experimental feature not enabled by default and only enabled in 7.84.0. Fixed in upstream release 8.3.0. |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
curl
Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| focal |
Not vulnerable
(code not present)
|
|
| jammy |
Not vulnerable
(code not present)
|
|
| lunar |
Released
(7.88.1-8ubuntu2.2)
|
|
| mantic |
Released
(8.2.1-1ubuntu3)
|
|
| noble |
Released
(8.2.1-1ubuntu3)
|
|
| trusty |
Not vulnerable
(code not present)
|
|
| upstream |
Needs triage
|
|
| xenial |
Not vulnerable
(code not present)
|
|
|
Patches:
upstream: https://github.com/curl/curl/commit/3ee79c1674fd6f9 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |