Denial of service in Unbound
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-10772 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Unbound Server applications / DNS servers |
| Vendor | NLnet Labs |
Security Bulletin
This security bulletin contains information about 1 vulnerabilities.
Updated: 27.07.2020
Changed bulletin status to patched.
1) Input validation error
EUVDB-ID: #VU29959
Risk: Medium
CVSSv3.1: 6.9 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:U/RC:C]
CVE-ID: CVE-2020-10772
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due incomplete fix for vulnerability SB2020052127 #1 (CVE-2020-12662). A remote attacker who controls a malicious DNS server can send a specially crafted response and perform a denial of service (DoS) attack against third-party DNS servers.
MitigationInstall update from vendor's website.
Vulnerable software versionsUnbound: 1.10.1
External linkshttp://access.redhat.com/errata/RHSA-2020:2642
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
