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Fencer Vulns
low 3.7

CVE-2019-5435 json

An integer overflow in curl's URL API results in a buffer overflow in libcurl 7.62.0 to and including 7.64.1.

published 2019-05-28 7 y ago modified 2026-10-14 25 d ago also EUVD-2019-15025

cvss
3.7
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.7%
EPSS 5.7% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

An integer overflow in curl's URL API results in a buffer overflow in libcurl 7.62.0 to and including 7.64.1.

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 7.64.0-4

debian advisories DEBIAN-CVE-2019-5435

  • jbcs-httpd24-apr jboss core services 1 1.6.3-104.jbcs.el6
  • jbcs-httpd24-apr jboss core services 1 1.6.3-104.jbcs.el7
  • jbcs-httpd24-curl jboss core services 1 7.64.1-44.jbcs.el6
  • jbcs-httpd24-curl jboss core services 1 7.64.1-44.jbcs.el7
  • jbcs-httpd24-httpd jboss core services 1 2.4.37-64.jbcs.el6
  • jbcs-httpd24-httpd jboss core services 1 2.4.37-64.jbcs.el7
  • jbcs-httpd24-brotli jboss core services 1 1.0.6-38.jbcs.el6
  • jbcs-httpd24-brotli jboss core services 1 1.0.6-38.jbcs.el7

red hat advisories RHSA-2020:4384

  • curl openSUSE Tumbleweed 7.79.1-1.1

opensuse advisories openSUSE-SU-2024:10582-1

  • curl Alpine 3.24, Alpine 3.23, Alpine 3.22 +12 more 7.65.0-r0
  • curl Alpine 3.9 7.64.0-r2

alpine advisories ALPINE-CVE-2019-5435

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

  • lib32-libcurl-gnutls Arch Linux 7.65.0-1
  • lib32-libcurl-compat Arch Linux 7.65.0-1
  • lib32-curl Arch Linux 7.65.0-1

arch linux advisories AVG-961AVG-962AVG-963

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-2019-5435 updated cvss 3.7

curl: Integer overflows in curl_url_set() function

  • Red Hat JBoss Core Services
    fixed: vendor fix RHSA-2020:4383
  • Red Hat JBoss Core Services on RHEL 6 Server jbcs-httpd24-apr 1.6.3-104.jbcs.el6, jbcs-httpd24-curl 7.64.1-44.jbcs.el6, jbcs-httpd24-brotli 1.0.6-38.jbcs.el6, jbcs-httpd24-httpd 2.4.37-64.jbcs.el6, jbcs-httpd24-jansson 2.11-53.jbcs.el6, jbcs-httpd24-mod_md 2.0.8-30.jbcs.el6, +26 more Red Hat JBoss Core Services on RHEL 7 Server jbcs-httpd24-apr 1.6.3-104.jbcs.el7, jbcs-httpd24-curl 7.64.1-44.jbcs.el7, jbcs-httpd24-brotli 1.0.6-38.jbcs.el7, jbcs-httpd24-httpd 2.4.37-64.jbcs.el7, jbcs-httpd24-jansson 2.11-53.jbcs.el7, jbcs-httpd24-mod_md 2.0.8-30.jbcs.el7, +27 more
    fixed: vendor fix RHSA-2020:4384
  • Red Hat .NET Core 1.0 on Red Hat Enterprise Linux rh-dotnetcore10-curl Red Hat .NET Core 1.1 on Red Hat Enterprise Linux rh-dotnetcore11-curl 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
    +4 more products
    Red Hat Enterprise Linux 7 curl, libcurl Red Hat Enterprise Linux 8 curl, libcurl, libcurl-minimal Red Hat JBoss Web Server 5 curl Red Hat Software Collections httpd24-curl, httpd24-libcurl
    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 3.7

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

5.66% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • curl.haxx.se https://curl.haxx.se/docs/CVE-2019-5435.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.0 3.7 CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
NVD 2.0 4.3 AV:N/AC:M/Au:N/C:N/I:N/A:P

Affected products

  • curl 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
  • CWE-131 Incorrect Calculation of Buffer Size
  • CWE-190 Integer Overflow or Wraparound

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.