--- id: CVE-2019-5436 title: >- A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4 through 7.64.1. summary: >- A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4 through 7.64.1. severity: high cvss: 7.8 cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H' cwe: - CWE-122 - CWE-787 vendor: haxx product: libcurl affected: - 'libcurl >= 7.19.4, <= 7.64.1' - leap = 15.0 - leap = 15.1 - leap = 42.3 - fedora = 29 - debian_linux = 9.0 - debian_linux = 10.0 - 'traffix_signaling_delivery_controller >= 5.0.0, <= 5.1.0' - hci_management_node - solidfire - steelstore_cloud_integrated_storage - enterprise_manager_ops_center = 12.3.3 - enterprise_manager_ops_center = 12.4.0 - mysql_server <= 5.7.27 - 'mysql_server >= 5.7.28, <= 8.0.17' - oss_support_tools = 20.0 published: '2019-05-28' updated: '2026-10-14' sourceUpdated: '2026-10-14T07:16:54.610' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2019-5436' references: - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00008.html' label: support@hackerone.com - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00017.html' label: support@hackerone.com - url: 'http://www.openwall.com/lists/oss-security/2019/09/11/6' label: support@hackerone.com - url: 'https://curl.haxx.se/docs/CVE-2019-5436.html' label: support@hackerone.com - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SMG3V4VTX2SE3EW3HQTN3DDLQBTORQC2/ label: support@hackerone.com - url: 'https://seclists.org/bugtraq/2020/Feb/36' label: support@hackerone.com - url: 'https://security.gentoo.org/glsa/202003-29' label: support@hackerone.com - url: 'https://security.netapp.com/advisory/ntap-20190606-0004/' label: support@hackerone.com - url: 'https://support.f5.com/csp/article/K55133295' label: support@hackerone.com - url: >- https://support.f5.com/csp/article/K55133295?utm_source=f5support&%3Butm_medium=RSS label: support@hackerone.com - url: 'https://www.debian.org/security/2020/dsa-4633' label: support@hackerone.com - url: 'https://www.oracle.com/security-alerts/cpuapr2020.html' label: support@hackerone.com - url: 'https://www.oracle.com/security-alerts/cpuoct2020.html' label: support@hackerone.com - url: >- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html label: support@hackerone.com - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00008.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00017.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'http://www.openwall.com/lists/oss-security/2019/09/11/6' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://curl.haxx.se/docs/CVE-2019-5436.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SMG3V4VTX2SE3EW3HQTN3DDLQBTORQC2/ label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://seclists.org/bugtraq/2020/Feb/36' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://security.gentoo.org/glsa/202003-29' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://security.netapp.com/advisory/ntap-20190606-0004/' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://support.f5.com/csp/article/K55133295' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://support.f5.com/csp/article/K55133295?utm_source=f5support&%3Butm_medium=RSS label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.debian.org/security/2020/dsa-4633' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.oracle.com/security-alerts/cpuapr2020.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://www.oracle.com/security-alerts/cpuoct2020.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: >- https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://cert-portal.siemens.com/productcert/html/ssa-398330.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e tags: - nvd epss: 0.49739 epssPercentile: 0.98874 ingestedAt: '2026-10-14T07:21:04.813Z' --- ## Overview A heap buffer overflow in the TFTP receiving code allows for DoS or arbitrary code execution in libcurl versions 7.19.4 through 7.64.1. ## Affected - `libcurl >= 7.19.4, <= 7.64.1` - `leap = 15.0` - `leap = 15.1` - `leap = 42.3` - `fedora = 29` - `debian_linux = 9.0` - `debian_linux = 10.0` - `traffix_signaling_delivery_controller >= 5.0.0, <= 5.1.0` - `hci_management_node` - `solidfire` - `steelstore_cloud_integrated_storage` - `enterprise_manager_ops_center = 12.3.3` - `enterprise_manager_ops_center = 12.4.0` - `mysql_server <= 5.7.27` - `mysql_server >= 5.7.28, <= 8.0.17` - `oss_support_tools = 20.0` ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges.