CVE-2018-6406 Information

Description

The function ParseVP9SuperFrameIndex in common/libwebm_util.cc in libwebm through 2018-01-30 does not validate the child_frame_length data obtained from a .webm file which allows remote attackers to cause an information leak or a denial of service (heap-based buffer over-read and later out-of-bounds write) or possibly have unspecified other impact.

CVSS Vector

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

Reference

https://bugs.chromium.org/p/webm/issues/detail?id=1492 https://github.com/dwfault/PoCs/blob/master/libwebm20ParseVP9SuperFrameIndex20memory20corruption/libwebm20ParseVP9SuperFrameIndex20OOB20read.md

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.8