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Fencer Vulns
medium 5.3

CVE-2019-17594 json

There is a heap-based buffer over-read in the _nc_find_entry function in tinfo/comp_hash.c in the terminfo library in ncurses before 6.1-20…

published 2019-10-14 7 y ago modified 2026-10-14 26 d ago also EUVD-2019-7922 , JLSEC-2026-443

cvss
5.3
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 46%
public exploits
0
none known

Summary

There is a heap-based buffer over-read in the _nc_find_entry function in tinfo/comp_hash.c in the terminfo library in ncurses before 6.1-20191012.

Patch / fix

  • julia Ncurses_jll 6.2.0+0
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • ncurses Debian 14, Debian 13, Debian 12 6.1+20191019-1

debian advisories DEBIAN-CVE-2019-17594

  • ncurses Ubuntu 18.04 LTS 6.1-1ubuntu1.18.04.1
  • ncurses Ubuntu 20.04 LTS 6.1+20191019-1ubuntu1
  • ncurses Ubuntu Pro 14.04 LTS 5.9+20140118-1ubuntu1+esm2
  • ncurses Ubuntu Pro 16.04 LTS 6.0+20160213-1ubuntu1+esm2

ubuntu advisories UBUNTU-CVE-2019-17594

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • ncurses RHEL 8 6.1-9.20180224.el8
  • ncurses-base RHEL 8 6.1-9.20180224.el8
  • ncurses-libs RHEL 8 6.1-9.20180224.el8
  • ncurses-term RHEL 8 6.1-9.20180224.el8
  • ncurses-c++-libs RHEL 8 6.1-9.20180224.el8
  • ncurses-compat-libs RHEL 8 6.1-9.20180224.el8

red hat advisories RHSA-2021:4426

  • ncurses SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +4 more 5.9-69.1
  • ncurses SLE Module for Legacy 15 SP1, SLE Module for Legacy 15, SLE Module for Development Tools 15 SP1 +3 more 6.1-5.6.2

suse advisories SUSE-SU-2019:3094-1SUSE-SU-2019:2997-1

  • ncurses openSUSE Leap 15.1 6.1-lp151.6.3.1
  • ncurses openSUSE Leap 15.0 6.1-lp150.9.1

opensuse advisories openSUSE-SU-2019:2551-1openSUSE-SU-2019:2550-1

  • ncurses AlmaLinux 8 6.1-9.20180224.el8
  • ncurses-base AlmaLinux 8 6.1-9.20180224.el8
  • ncurses-libs AlmaLinux 8 6.1-9.20180224.el8
  • ncurses-term AlmaLinux 8 6.1-9.20180224.el8
  • ncurses-c++-libs AlmaLinux 8 6.1-9.20180224.el8
  • ncurses-compat-libs AlmaLinux 8 6.1-9.20180224.el8

almalinux advisories ALSA-2021:4426

  • ncurses Rocky Linux 8 6.1-9.20180224.el8

rocky linux advisories RLSA-2021:4426

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-2019-17594 updated cvss 5.3

ncurses: heap-based buffer overflow in the _nc_find_entry function in tinfo/comp_hash.c

  • Red Hat Enterprise Linux 5 ncurses Red Hat Enterprise Linux 6 ncurses, ncurses-base, ncurses-libs, ncurses-term
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 ncurses, ncurses-base, ncurses-libs, ncurses-term
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux BaseOS (v. 8) ncurses 6.1-9.20180224.el8, ncurses-base 6.1-9.20180224.el8, ncurses-libs 6.1-9.20180224.el8, ncurses-term 6.1-9.20180224.el8, ncurses-c++-libs 6.1-9.20180224.el8, ncurses-compat-libs 6.1-9.20180224.el8
    fixed: vendor fix RHSA-2021:4426

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

cisa ICSA-23-348-10 updated cvss 5.3

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
    affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • lists.gnu.org https://lists.gnu.org/archive/html/bug-ncurses/2019-10/msg00017.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P
OSV 3.1 5.3 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem package affected fixed in
julia Ncurses_jll
<6.2.0+0
6.2.0+0

Affected products

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness

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.