Risk | Medium |
Patch available | NO |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-25215 |
CWE-ID | CWE-617 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
BIG-IP Hardware solutions / Firmware BIG-IQ Centralized Management Server applications / Remote management servers, RDP, SSH |
Vendor | F5 Networks |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU52736
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-2021-25215
CWE-ID:
CWE-617 - Reachable Assertion
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a reachable assertion when processing DNAME records. A remote attacker can force named to add the same RRset to the ANSWER section more than once, trigger an assertion failure and crash the service. Both authoritative and recursive servers are affected by this issue during zone transfers.
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsBIG-IP: 11.6.1 - 16.0.1.1.9.6
BIG-IQ Centralized Management: 6.0.0 - 8.0.0
External linkshttp://support.f5.com/csp/article/K96223611
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.