SB2021070816 - Code execution in Cisco IP Phone products
Published: July 8, 2021
Security Bulletin ID
SB2021070816
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Physical access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Buffer overflow (CVE-ID: CVE-2021-33478)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in the TrustZone implementation. An attacker with physical access can dismount the backplate of the device, trigger a specific series of impulses on the chipset and execute arbitrary code on the target system.
Remediation
Install update from vendor's website.