PatchTheCVECVE-2005-1127: Format string vulnerability in the log function in Net::Server 0.87 and earlier, as used in Postfix Greylistin
CVE-2005-1127 is a medium-severity flaw (CVSS 5.0) affecting postgrey. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Format string vulnerability in the log function in Net::Server 0.87 and earlier, as used in Postfix Greylisting Policy Server (Postgrey) 1.18 and earlier, and possibly other products, allows remote attackers to cause a denial of service (crash) via format string specifiers that are not properly handled before being sent to syslog, as demonstrated using sender addresses to Postgrey.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.0 (Medium) |
| EPSS exploit chance | 2.7% (top 14%) |
| CISA exploited list | No |
| Published | 2005-05-02 |
| 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-2005-1127?
postgrey: upgrade to newer than 1.16. Exact commands for each OS are on this page.
Is CVE-2005-1127 being exploited?
CVE-2005-1127 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-2005-1127 affect?
CVE-2005-1127 affects postgrey. Severity is medium (CVSS 5.0). Format string vulnerability in the log function in Net::Server 0.87 and earlier, as used in Postfix Greylisting Policy Server (Postgrey) 1.18 and earlier, and possibly other products, allows remote attackers to cause a denial of service (cr
How urgent is CVE-2005-1127?
Priority 39/100. No elevated risk signals yet.