Risk | High |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2020-1747 |
CWE-ID | CWE-20 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
PyYAML Web applications / Modules and components for CMS |
Vendor | The YAML Project |
Security Bulletin
This security bulletin contains one high risk vulnerability.
EUVDB-ID: #VU25823
Risk: High
CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-1747
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to insufficient validation of user-supplied input when processing untrusted YAML files passed via the "full_load" method or with the "FullLoader" loader. A remote attacker can pass specially crafted input to the application and execute arbitrary code by abusing the python/object/new constructor.
MitigationInstall update from vendor's website.
Vulnerable software versionsPyYAML: 3.01 - 5.3
External linkshttp://snyk.io/vuln/SNYK-PYTHON-PYYAML-559098
http://github.com/yaml/pyyaml/pull/386
http://bugzilla.redhat.com/show_bug.cgi?id=1807367
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.