Description
The Cpanel::JSON::XS package before 4.33 for Perl performs out-of-bounds accesses in a way that allows attackers to obtain sensitive information or cause a denial of service.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libcpanel-json-xs-perl | 4.35-1 | — |
| Debian 13 | libcpanel-json-xs-perl | 4.35-1 | — |
| Debian 12 | libcpanel-json-xs-perl | 4.35-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | libcpanel-json-xs-perl | 4.27-1ubuntu0.1 | USN-6667-1 |
| Ubuntu 20.04 LTS | libcpanel-json-xs-perl | 4.19-1ubuntu0.1 | USN-6667-1 |
| Ubuntu 18.04 LTS | libcpanel-json-xs-perl | No fix yet | — |
| Ubuntu 16.04 LTS | libcpanel-json-xs-perl | No fix yet | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | perl-Cpanel-JSON-XS | 4.25-2.amzn2023.0.6 | ALAS2023-2024-556 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | perl-Cpanel-JSON-XS | 4.39-1 | — |
| Azure Linux 2 (CBL-Mariner) | perl-Cpanel-JSON-XS | No fix yet | — |
Advisories 2
- USN-6667-1 libcpanel-json-xs-perl vulnerability Ubuntu Security Notices (USN) · Apr 27, 2026
- ALAS2023-2024-556 Important: perl-Cpanel-JSON-XS security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Mar 5, 2024
References
- https://metacpan.org/release/RURBAN/Cpanel-JSON-XS-4.33/changes
- https://github.com/briandfoy/cpan-security-advisory/blob/9374f98bef51e1ae887f293234050551c079776f/cpansa/CPANSA-Cpanel-JSON-XS.yml#L25-L36
- https://github.com/rurban/Cpanel-JSON-XS/issues/208
- https://github.com/rurban/Cpanel-JSON-XS/commit/41f32396eee9395a40f9ed80145c37622560de9b