PatchTheCVECVE-2013-1841: Net-Server, when the reverse-lookups option is enabled, does not check if the hostname resolves to the source
CVE-2013-1841 is a medium-severity flaw (CVSS 4.3) affecting net-server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- No elevated risk signals yet
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 4.3 (Medium) |
| EPSS exploit chance | 1.9% (top 20%) |
| CISA exploited list | No |
| Weakness | CWE-264 |
| Published | 2014-06-13 |
| Last modified | 2026-06-16 |
Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2013-1841?
net-server: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2013-1841 being exploited?
CVE-2013-1841 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2013-1841 affect?
CVE-2013-1841 affects net-server. Severity is medium (CVSS 4.3). 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.
How urgent is CVE-2013-1841?
Priority 35/100. No elevated risk signals yet.