REDHAT-BUG-1641458: Buffer Overflow

Published Oct 22, 2018

Updated

In EDK II, a vulnerability exists in BaseUefiDecompressLib.c, TianoCompress.c, and UEFI specification via a stack-based buffer overflow in the MakeTable() function. An authenticated attacker could exploit this via a crafted file to escalate privileges.

External Reference:

https://edk2-docs.gitbooks.io/security-advisory/content/edk-ii-tianocompress-bounds-checking-issues.html

Upstream Bug:

https://bugzilla.tianocore.org/showbug.cgi?id=686

Affected Software

1 affected component

Tianocore EDK II

Event History

Oct 22, 2018

Data Sourced

via Red Hat·06:19 AM

DescriptionSeverityAffected Software

Frequently Asked Questions

What is the severity of REDHAT-BUG-1641458?

The severity of REDHAT-BUG-1641458 is high due to a stack-based buffer overflow vulnerability that can be exploited to escalate privileges.

How do I fix REDHAT-BUG-1641458?

To fix REDHAT-BUG-1641458, you should apply the latest security updates for TianoCore EDK II that address this vulnerability.

Who is affected by REDHAT-BUG-1641458?

TianoCore EDK II users are affected by REDHAT-BUG-1641458 if they are running versions vulnerable to the stack-based buffer overflow.

What causes the vulnerability in REDHAT-BUG-1641458?

The vulnerability in REDHAT-BUG-1641458 is caused by insufficient bounds checking in the MakeTable() function within BaseUefiDecompressLib.c and TianoCompress.c.

Can REDHAT-BUG-1641458 be exploited remotely?

Yes, an authenticated attacker could exploit REDHAT-BUG-1641458 by providing a crafted file that triggers the buffer overflow.