Security Advisory
1) XML External Entity injection
Risk: Medium
CVSSv3: 4.7 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C] [PCI]
CVE-ID: CVE-2020-24379
CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')
Exploit availability: No
Description
The 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.
Mitigation
Update yaws package to version 2.0.6+dfsg-1+deb10u1.
Vulnerable software versions
yaws (Debian package): 1.85-1, 1.86-1, 1.86-2, 1.87-1, 1.88-1, 1.88-2, 1.88-2+squeeze1, 1.89-1, 1.90-1, 1.90-2, 1.91-1, 1.91-2, 1.91-3, 1.92-1, 1.92-2, 1.92-3, 1.92-4, 1.93-1, 1.93-2, 1.94-1, 1.95-1, 1.96-1, 1.96-2, 1.96-3, 1.96-4, 1.97-1, 1.97-2, 1.98, 1.98-1, 1.98-2, 1.98-3, 1.98-4, 1.98-4+deb8u1, 1.98-5, 1.99-1, 1.99-2, 2.0.2-1, 2.0.2-2, 2.0.3+dfsg-1, 2.0.3-1, 2.0.3-2, 2.0.4+dfsg, 2.0.4+dfsg-1, 2.0.4+dfsg-1~bpo8+1, 2.0.4+dfsg-2, 2.0.4+dfsg-3, 2.0.5+dfsg-1, 2.0.6+dfsg, 2.0.6+dfsg-1, 2.0.6+dfsg-3, 2.0.7+dfsg, 2.0.7+dfsg-1, 2.0.7+dfsg-2
CPE
External links