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Fencer Intel
critical 9.8

CVE-2019-5481 in the critical feed json

Double-free vulnerability in the FTP-kerberos code in cURL 7.52.0 to 7.65.3.

published 2019-09-16 7 y ago modified 2026-10-14 26 d ago also EUVD-2019-15059

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
7.5%
EPSS 7.5% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

Double-free vulnerability in the FTP-kerberos code in cURL 7.52.0 to 7.65.3.

Patch / fix

  • 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
  • curl Debian 14, Debian 13, Debian 12 7.66.0-1

debian advisories DEBIAN-CVE-2019-5481

  • curl Ubuntu 18.04 LTS 7.58.0-2ubuntu3.8

ubuntu advisories UBUNTU-CVE-2019-5481

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

  • curl RHEL 8 7.61.1-12.el8
  • libcurl RHEL 8 7.61.1-12.el8
  • libcurl-minimal RHEL 8 7.61.1-12.el8
  • jbcs-httpd24-apr jboss core services 1 1.6.3-73.jbcs.el6
  • jbcs-httpd24-apr jboss core services 1 1.6.3-73.jbcs.el7
  • jbcs-httpd24-curl jboss core services 1 7.64.1-21.jbcs.el6
  • jbcs-httpd24-curl jboss core services 1 7.64.1-21.jbcs.el7
  • jbcs-httpd24-httpd jboss core services 1 2.4.37-41.jbcs.el6

red hat advisories RHSA-2020:1792RHSA-2020:0250

  • curl SLES for SAP 12 SP4, SLES 12 SP4, SLED 12 SP4 +1 more 7.60.0-4.9.1
  • curl SLE Module for Basesystem 15 SP1, SLE Module for Basesystem 15 7.60.0-3.23.1

suse advisories SUSE-SU-2019:2381-1SUSE-SU-2019:2373-1

  • curl openSUSE Tumbleweed 7.79.1-1.1
  • curl openSUSE Leap 15.0 7.60.0-lp150.2.25.1
  • curl openSUSE Leap 15.1 7.60.0-lp151.5.6.1
  • curl-mini openSUSE Leap 15.1 7.60.0-lp151.5.6.1

opensuse advisories openSUSE-SU-2024:10582-1openSUSE-SU-2019:2169-1openSUSE-SU-2019:2149-1

  • curl Alpine 3.24, Alpine 3.23, Alpine 3.22 +12 more 7.66.0-r0
  • curl Alpine 3.8, Alpine 3.7 7.61.1-r3
  • curl Alpine 3.9 7.64.0-r3
  • gnurl Alpine 3.17, Alpine 3.16 7.66.0-r0

alpine advisories ALPINE-CVE-2019-5481

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

  • curl Arch Linux 7.66.0-1

arch linux advisories AVG-1982

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-2019-5481 updated cvss 5.7

curl: double free due to subsequent call of realloc()

  • Red Hat Software Collections httpd24-curl, httpd24-libcurl
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux BaseOS (v. 8) curl 7.61.1-12.el8, libcurl 7.61.1-12.el8, libcurl-minimal 7.61.1-12.el8
    fixed: vendor fix RHSA-2020:1792
  • Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-apr 1.6.3-73.jbcs.el6, jbcs-httpd24-brotli 1.0.6-9.jbcs.el6, jbcs-httpd24-curl 7.64.1-21.jbcs.el6, jbcs-httpd24-httpd 2.4.37-41.jbcs.el6, jbcs-httpd24-jansson 2.11-24.jbcs.el6, jbcs-httpd24-mod_md 2.0.8-10.jbcs.el6, +26 more Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr 1.6.3-73.jbcs.el7, jbcs-httpd24-brotli 1.0.6-9.jbcs.el7, jbcs-httpd24-curl 7.64.1-21.jbcs.el7, jbcs-httpd24-httpd 2.4.37-41.jbcs.el7, jbcs-httpd24-jansson 2.11-24.jbcs.el7, jbcs-httpd24-mod_md 2.0.8-10.jbcs.el7, +26 more
    fixed: vendor fix RHSA-2020:0250
  • Red Hat .NET Core 2.1 on Red Hat Enterprise Linux rh-dotnet21-curl, rh-dotnet21-libcurl Red Hat .NET Core 2.2 on Red Hat Enterprise Linux rh-dotnet22-curl, rh-dotnet22-libcurl Red Hat Enterprise Linux 5 curl Red Hat Enterprise Linux 6 curl, libcurl Red Hat Enterprise Linux 7 curl, libcurl Red Hat JBoss Web Server 5 curl
    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

cisa ICSA-23-348-10 updated cvss 9.8

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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
6 mo ago

Exploit prediction

7.46% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/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

Affected products

  • n/a curl
  • 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
Technology feeds

References

Sources

Fencer Intel 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.