CVE-2023-27537
Published: 20 March 2023
A double free vulnerability exists in libcurl <8.0.0 when sharing HSTS data between separate "handles". This sharing was introduced without considerations for do this sharing across separate threads but there was no indication of this fact in the documentation. Due to missing mutexes or thread locks, two threads sharing the same HSTS data could end up doing a double-free or use-after-free.
Notes
| Author | Note |
|---|---|
| mdeslaur | introduced in 7.88.0 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
curl Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
|
| focal |
Not vulnerable
|
|
| jammy |
Not vulnerable
|
|
| kinetic |
Not vulnerable
(7.85.0-1ubuntu0.3)
|
|
| lunar |
Released
(7.88.1-6ubuntu2)
|
|
| trusty |
Not vulnerable
|
|
| upstream |
Pending
(8.0.0)
|
|
| xenial |
Not vulnerable
|
|
|
Patches: upstream: https://github.com/curl/curl/commit/dca4cdf071be0 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.9 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |