Description
Net-Server, when the reverse-lookups option is enabled, does not check if the hostname resolves to the source IP address, which might allow remote attackers to bypass ACL restrictions via the hostname parameter.
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 | libnet-server-perl | 2.013-1 | — |
| Debian 13 | libnet-server-perl | 2.013-1 | — |
| Debian 12 | libnet-server-perl | 2.013-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | libnet-server-perl | No fix yet | — |
| Ubuntu 20.04 LTS | libnet-server-perl | No fix yet | — |
| Ubuntu 18.04 LTS | libnet-server-perl | No fix yet | — |
| Ubuntu 16.04 LTS | libnet-server-perl | No fix yet | — |
| Ubuntu 14.04 LTS | libnet-server-perl | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP4 | perl-Net-Server | 2.009-150000.3.3.1 | SUSE-SU-2023:0746-1 |
| SLES 12 SP5 | perl-Net-Server | 2.007-5.3.1 | SUSE-SU-2023:0759-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP5 | perl-Net-Server | 2.007-5.3.1 | SUSE-SU-2023:0759-1 |
| SLE Real Time 15 SP3 | perl-Net-Server | 2.009-150000.3.3.1 | SUSE-SU-2023:0746-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.4 | perl-Net-Server | 2.009-150000.3.3.1 | SUSE-SU-2023:0746-1 |
Advisories 2
- SUSE-SU-2023:0759-1 Security update for perl-Net-Server SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:0746-1 Security update for perl-Net-Server SUSE / openSUSE Security Updates · Feb 4, 2026