Skip to content
Fencer Vulns
high 7.5

CVE-2020-6582 json

Nagios NRPE 3.2.1 has a Heap-Based Buffer Overflow, as demonstrated by interpretation of a small negative number as a large positive number…

published 2020-03-16 6 y ago modified 2026-06-17 4 mo ago also EUVD-2020-27730

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.4%
EPSS 4.4% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

Nagios NRPE 3.2.1 has a Heap-Based Buffer Overflow, as demonstrated by interpretation of a small negative number as a large positive number during a bzero call.

Patch / fix

  • nagios-nrpe Debian 14, Debian 13, Debian 12 4.0.0-1

debian advisories DEBIAN-CVE-2020-6582

  • nrpe Alpine 3.24, Alpine 3.23, Alpine 3.22 +8 more 4.0.0-r0

alpine advisories ALPINE-CVE-2020-6582

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-6582 updated cvss 7.5

nrpe: heap-based buffer overflow due to a wrong integer type conversion

  • Red Hat Storage 3 nrpe, nagios-plugins-nrpe
    not affected: vulnerable code not present “There is no known mitigation for this issue, the flaw can only be resolved by applying updates.”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

4.44% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • herolab.usd.de https://herolab.usd.de/security-advisories/usd-2020-0001/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-681 Incorrect Conversion between Numeric Types
  • CWE-787 Out-of-bounds Write

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.