40. AuthVariable Timestamp Zeroing on APPEND_WRITE

Description:

Logic issue in variable service module for EDK II/UDK2018/UDK2017/UDK2015 may allow an authenticated user to potentially enable escalation of privilege, information disclosure and/or denial of service via local access.

Impact:

Escalation of Privilege, Information Disclosure and/or Denial of Service

Severity:

Medium 6.7 CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Recommendation:

EDK II commits:

• [master] https://github.com/tianocore/edk2/commit/b7dc8888f31402f410c53242839271ba3b94b619
• [UDK2018] https://github.com/tianocore/edk2/commits/348d9f7a078cf8893a803bc4e90abefb3126344a
• [UDK2017] https://github.com/tianocore/edk2/commits/5c693e581e6ab2c8e9daac170616d867272399d9
• [UDK2015] https://github.com/tianocore/edk2/commits/2bfddc064b1cd1f4539350bff1473a9c371865d8

Acknowledgments:

Intel Team

References:

CVE-2018-3613

EDK II Bugzilla #415