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Fencer Vulns
critical 9.8

CVE-2017-12588 json

The zmq3 input and output modules in rsyslog before 8.28.0 interpreted description fields as format strings, possibly allowing a format str…

published 2017-08-06 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-4159

cvss
9.8
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.8%
EPSS 2.8% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

The zmq3 input and output modules in rsyslog before 8.28.0 interpreted description fields as format strings, possibly allowing a format string attack with unspecified impact.

Patch / fix

  • rsyslog Debian 14, Debian 13, Debian 12 8.28.0-1

debian advisories DEBIAN-CVE-2017-12588

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-2017-12588 updated cvss 4.9

rsyslog: multiple format string vulnerabilities in zmq3 modules

  • Red Hat Enterprise Linux 5 rsyslog, rsyslog5 Red Hat Enterprise Linux 6 rsyslog, rsyslog7, rsyslog-relp, rsyslog-snmp, rsyslog-mysql, rsyslog-pgsql, +9 more Red Hat Enterprise Linux 7 rsyslog, rsyslog-relp, rsyslog-snmp, rsyslog-kafka, rsyslog-mysql, rsyslog-pgsql, +11 more
    not affected: vulnerable code not present

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

2.83% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 9.8 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-134 Use of Externally-Controlled Format String

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.