SB2020043038 - Denial of service in Virtual Server implementation on some BIG-IP systems
Published: April 30, 2020 Updated: December 17, 2020
Security Bulletin ID
SB2020043038
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2020-5883)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to perform DoS attack on the target system.
The vulnerability exists due memory leak when processing POST requests on HTTP Explicit Proxy Virtual Server with configured HTTP_PROXY_REQUEST iRule. A remote attacker can send a specially crafted HTTP request to the virtual server and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.