SB2019032719 - Privilege escalation in EDK2
Published: March 27, 2019 Updated: August 2, 2024
Security Bulletin ID
SB2019032719
Severity
Low
Patch available
YES
Number of vulnerabilities
2
Exploitation vector
Physical access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 2 secuirty vulnerabilities.
1) Stack-based buffer overflow (CVE-ID: CVE-2018-12183)
The vulnerability allows an attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in DxeCore. An attacker with physical access to the system can trigger a stack-based buffer overflow and execute arbitrary code on the target system.
2) Buffer overflow (CVE-ID: CVE-2018-12182)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to insufficient memory write check in SMM service. A local user can trigger memory corruption and execute arbitrary code with elevated privileges.Remediation
Install update from vendor's website.
References
- http://www.securityfocus.com/bid/107643
- https://edk2-docs.gitbooks.io/security-advisory/content/unlimited-fv-recursion.html
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TQYVZRFEXSN3KS43AVH4D7QX553EZQYP/
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbhf03912en_us
- http://www.securityfocus.com/bid/107648
- https://edk2-docs.gitbooks.io/security-advisory/content/sw-smi-confused-deputy-smramsavestate_c.html