#VU20961 Improper validation of certificate with host mismatch in SKS Keyserver and GnuPG - CVE-2019-13050
Published: September 10, 2019
Vulnerability identifier: #VU20961
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-13050
CWE-ID: CWE-297
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
SKS Keyserver
GnuPG
SKS Keyserver
GnuPG
Software vendor:
sks-keyservers.net
GNU
sks-keyservers.net
GNU
Description
The vulnerability allows a remote attacker to cause a persistent denial of service (DoS) condition on the target system.
The vulnerability exists due to the interaction between the vulnerable applications makes it risky to have a GnuPG keyserver configuration line referring to a host on the SKS keyserver network. A remote attacker can retrieve data from this network and cause a persistent denial of service, because of a certificate spamming attack.
Remediation
Install updates from vendor's website.