CVE-2019-20477

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-502

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/yaml/pyyaml/blob/master/CHANGESRelease Notes, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H/
https://www.exploit-db.com/download/47655Exploit, Third Party Advisory, VDB Entry
https://github.com/yaml/pyyaml/blob/master/CHANGESRelease Notes, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H/
https://www.exploit-db.com/download/47655Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Feb 19, 2020
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2019

CVE-2019-204789.8In ruamel.yaml through 0.16.7, the load method allows remote code execution if the application calls this method with an untrusted argument.CVE-2019-204796.1A flaw was found in mod_auth_openidc before version 2.4.1. An open redirect issue exists in URLs with a slash and backslash at the beginning CVE-2019-204808.8In MIELE XGW 3000 ZigBee Gateway before 2.4.0, a malicious website visited by an authenticated admin user or a malicious mail is allowed to CVE-2019-204819.8In MIELE XGW 3000 ZigBee Gateway before 2.4.0, the Password Change Function does not require knowledge of the old password. This can be expl CVE-2019-204835.4An issue was discovered in Viki Vera 4.9.1.26180. An attacker could set a user's last name to an XSS Payload, and read another user's cookie CVE-2019-204848.1An issue was discovered in Viki Vera 4.9.1.26180. A user without access to a project could download or upload project files by opening the P CVE-2019-204855.7qemu/qemu_driver.c in libvirt before 6.0.0 mishandles the holding of a monitor job during a query to a guest agent, which allows attackers t CVE-2019-204866.1An issue was discovered on NETGEAR WNR1000V4 1.1.0.54 devices. Multiple pages (setup.cgi and adv_index.htm) within the web management consol CVE-2019-204878.8An issue was discovered on NETGEAR WNR1000V4 1.1.0.54 devices. Multiple actions within the WNR1000V4 web management console are vulnerable t CVE-2019-204889.8An issue was discovered on NETGEAR WNR1000V4 1.1.0.54 devices. Multiple actions within the web management interface (setup.cgi) are vulnerab CVE-2019-204899.8An issue was discovered on NETGEAR WNR1000V4 1.1.0.54 devices. The web management interface (setup.cgi) has an authentication bypass and oth CVE-2019-20497.8In SendMediaUpdate and SendFolderUpdate of avrcp_service.cc, there is a possible memory corruption due to a use after free. This could lead