Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2020-12823 |
CWE-ID | CWE-119 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software |
OpenConnect VPN Client Client/Desktop applications / Other client software |
Vendor | OpenConnect |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU28192
Risk: Medium
CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2020-12823
CWE-ID:
CWE-119 - Memory corruption
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary within the get_cert_name() function in gnutls.c. A remote attacker can trick the victim to connect to a malicious VPN server, trigger buffer overflow and crash the client or execute arbitrary code on the system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
MitigationInstall update from vendor's website.
Vulnerable software versionsOpenConnect VPN Client: 3.99 - 8.09
CPE2.3https://bugs.gentoo.org/721570
https://gitlab.com/openconnect/openconnect/-/merge_requests/108
https://lists.debian.org/debian-lts-announce/2020/05/msg00015.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AYSXLXAPXD2T73T6JMHI5G2WP7KHAGMN/
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.