Risk | High |
Patch available | YES |
Number of vulnerabilities | 2 |
CVE-ID | CVE-2020-24379 CVE-2020-24916 |
CWE-ID | CWE-611 CWE-78 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
Yaws Other software / Other software solutions |
Vendor | yaws.hyber.org |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
EUVDB-ID: #VU47119
Risk: Medium
CVSSv3.1: 4.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-24379
CWE-ID:
CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to gain access to sensitive information.
The vulnerability exists due to insufficient validation of user-supplied XML input within WebDAV implementation in Yaws web server A remote attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.
Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.
MitigationInstall updates from vendor's website.
Vulnerable software versionsYaws: 1.81 - 2.0.7
External linkshttp://github.com/erlyaws/yaws/commits/master
http://github.com/vulnbe/poc-yaws-dav-xxe
http://lists.debian.org/debian-lts-announce/2020/09/msg00022.html
http://packetstormsecurity.com/files/159106/Yaws-2.0.7-XML-Injection-Command-Injection.html
http://vuln.be/post/yaws-xxe-and-shell-injections/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
EUVDB-ID: #VU47120
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-2020-24916
CWE-ID:
CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary shell commands on the target system.
The vulnerability exists due to improper input validation within CGI implementation in Yaws web server. A remote unauthenticated attacker can pass specially crafted data to the application and execute arbitrary OS commands on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsYaws: 1.81 - 2.0.7
External linkshttp://github.com/erlyaws/yaws/commits/master
http://github.com/vulnbe/poc-yaws-cgi-shell-injection
http://lists.debian.org/debian-lts-announce/2020/09/msg00022.html
http://packetstormsecurity.com/files/159106/Yaws-2.0.7-XML-Injection-Command-Injection.html
http://vuln.be/post/yaws-xxe-and-shell-injections/
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.