Risk | High |
Patch available | NO |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-20305 |
CWE-ID | CWE-327 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
BIG-IP Hardware solutions / Firmware |
Vendor | F5 Networks |
Security Bulletin
This security bulletin contains one high risk vulnerability.
EUVDB-ID: #VU52195
Risk: High
CVSSv3.1: 7.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:U/RC:C]
CVE-ID: CVE-2021-20305
CWE-ID:
CWE-327 - Use of a Broken or Risky Cryptographic Algorithm
Exploit availability: No
DescriptionThe vulnerability allows a remote non-authenticated attacker to execute arbitrary code.
A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.
MitigationCybersecurity Help is currently unaware of any official solution to address this vulnerability.
Vulnerable software versionsBIG-IP: 14.1.0 - 16.0.1.1.9.6
External linkshttp://support.f5.com/csp/article/K33101555
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.