Risk | Medium |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2021-23047 |
CWE-ID | CWE-401 |
Exploitation vector | Network |
Public exploit | N/A |
Vulnerable software Subscribe |
BIG-IP APM Hardware solutions / Security hardware applicances |
Vendor | F5 Networks |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
EUVDB-ID: #VU56157
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-23047
CWE-ID:
CWE-401 - Missing release of memory after effective lifetime
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due memory leak in the Online Certificate Status Protocol (OCSP) verification of a certificate that contains Authority Information Access (AIA). A remote attacker can send a specially crafted OCSP AIA request and cause a denial of service condition on the target system.
MitigationInstall updates from vendor's website.
Vulnerable software versionsBIG-IP APM: 11.6.1 - 16.0.1
External linkshttp://support.f5.com/csp/article/K79428827
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.