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TI-2019-12712 Aliases CVE-2019-17042GHSA-cc7p-3mrm-7xhh

An issue was discovered in Rsyslog v8.1908.0.

Priority MEDIUM 47CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 11 fixed, 1 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

An issue was discovered in Rsyslog v8.1908.0. contrib/pmcisconames/pmcisconames.c has a heap overflow in the parser for Cisco log messages. The parser tries to locate a log message delimiter (in this case, a space or a colon), but fails to account for strings that do not satisfy this constraint. If the string does not match, then the variable lenMsg will reach the value zero and will skip the sanity check that detects invalid log messages. The message will then be considered valid, and the parser will eat up the nonexistent colon delimiter. In doing so, it will decrement lenMsg, a signed integer, whose value was zero and now becomes minus one. The following step in the parser is to shift left the contents of the message. To do this, it will call memmove with the right pointers to the target and destination strings, but the lenMsg will now be interpreted as a huge value, causing a heap overflow.

Why it matters now

EPSS 0.02983 87th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 11 fixed, 1 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 6

CPEVersionsRoleVendor
cpe:2.3:a:rsyslog:rsyslog:8.1908.0:*:*:*:*:*:*:*8.1908.0Vulnerablersyslog
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*30VulnerableFedoraproject
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*31VulnerableFedoraproject
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*9.0VulnerableDebian
cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*15.0VulnerableopenSUSE
cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*15.1VulnerableopenSUSE
  • cpe:2.3:a:rsyslog:rsyslog:8.1908.0:*:*:*:*:*:*:* Versions 8.1908.0 Vulnerable ·rsyslog
  • cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* Versions 30 Vulnerable ·Fedoraproject
  • cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
  • cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·openSUSE
  • cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE

Remediation

Red Hat 2 advisories

  • RHSA-2020:1702 Released 2020-04-28 · Red Hat rating Moderate
    rsyslog security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 8) rsyslog-8.1911.0-3.el8, rsyslog-crypto-8.1911.0-3.el8, rsyslog-doc-8.1911.0-3.el8 +13
  • RHSA-2020:1000 Released 2020-03-31 · Red Hat rating Moderate
    rsyslog security, bug fix, and enhancement update
    • Red Hat Enterprise Linux Client (v. 7) rsyslog-8.24.0-52.el7, rsyslog-gnutls-8.24.0-52.el7, rsyslog-gssapi-8.24.0-52.el7 +3
    • Red Hat Enterprise Linux Client Optional (v. 7) rsyslog-crypto-8.24.0-52.el7, rsyslog-doc-8.24.0-52.el7, rsyslog-elasticsearch-8.24.0-52.el7 +9
    • Red Hat Enterprise Linux ComputeNode (v. 7) rsyslog-8.24.0-52.el7, rsyslog-gnutls-8.24.0-52.el7, rsyslog-gssapi-8.24.0-52.el7 +3
    • Red Hat Enterprise Linux ComputeNode Optional (v. 7) rsyslog-crypto-8.24.0-52.el7, rsyslog-doc-8.24.0-52.el7, rsyslog-elasticsearch-8.24.0-52.el7 +9
    • Red Hat Enterprise Linux Server (v. 7) rsyslog-8.24.0-52.el7, rsyslog-gnutls-8.24.0-52.el7, rsyslog-gssapi-8.24.0-52.el7 +5
    • Red Hat Enterprise Linux Server Optional (v. 7) rsyslog-crypto-8.24.0-52.el7, rsyslog-doc-8.24.0-52.el7, rsyslog-elasticsearch-8.24.0-52.el7 +8
    • Red Hat Enterprise Linux Workstation (v. 7) rsyslog-8.24.0-52.el7, rsyslog-gnutls-8.24.0-52.el7, rsyslog-gssapi-8.24.0-52.el7 +5
    • Red Hat Enterprise Linux Workstation Optional (v. 7) rsyslog-crypto-8.24.0-52.el7, rsyslog-doc-8.24.0-52.el7, rsyslog-elasticsearch-8.24.0-52.el7 +7

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Ansible Tower 3.5 for RHEL 7 ServerFixed—
Red Hat Ansible Tower 3.6 for RHEL 7Fixed—
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2020:1702
Red Hat Enterprise Linux Client (v. 7)Fixed RHSA-2020:1000
Red Hat Enterprise Linux Client Optional (v. 7)Fixed RHSA-2020:1000
Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2020:1000
Red Hat Enterprise Linux ComputeNode Optional (v. 7)Fixed RHSA-2020:1000
Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:1000
Red Hat Enterprise Linux Server Optional (v. 7)Fixed RHSA-2020:1000
Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:1000
Red Hat Enterprise Linux Workstation Optional (v. 7)Fixed RHSA-2020:1000
Not affected: 1 product
  • Red Hat Enterprise Linux 5

Timeline

  1. 2026-10-02 Threatist record created from CVE-2019-17042
  2. 2026-10-03 Alias added: GHSA-cc7p-3mrm-7xhh

References

Patch 1

Advisory 6

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences