SB2021021107 - Buffer overflow in iRules LX component in F5 BIG-IP products
Published: February 11, 2021
Security Bulletin ID
SB2021021107
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) Out-of-bounds write (CVE-ID: CVE-2021-22973)
CWE-ID: CWE-787 - Out-of-bounds write
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 a denial of service (DoS) attack.
The vulnerability exists due to a boundary error within the JSON parser function in iRules LX component. A remote attacker can pass specially crafted data with iRules LX commands to the system, trigger out-of-bounds write and crash the Traffic Management Microkernel (TMM) module.
Remediation
Install update from vendor's website.