Samsung Qmage codec for Android Skia library does not properly validate image files

Overview

The Samsung Qmage codec used in the Android Skia library does not properly validate image files. A number of memory corruption vulnerabilities allow an attacker to execute arbitrary code by causing a vulnerable system to parse a Qmage file.

Description

The Samsung May 2020 Android Security Update notes that “a possible memory overwrite vulnerability in Quram qmg library allows possible remote arbitrary code execution.” Samsung identifies this vulnerability as SVE-2020-16747, more commonly known as CVE-2020-8899. Google Project Zero performed extensive fuzz testing on the Qmage (or Quram, or qmg) code that Samsung added to the Android Skia library and identified 5218 uniquely crashing test cases. At least one of these memory corruption vulnerabilities can be exploited by sending a specially crafted MMS message to a vulnerable system.

Samsung notes that versions O(8.X), P(9.0), Q(10.0) are affected.

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Impact

Exploitation of this vulnerability permits a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

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Solution

Apply an update

Samsung has released fixes in the May 2020 Android Security Update.

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Vendor Information

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Samsung Affected

Updated: May 14, 2020

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References

• <https://security.samsungmobile.com/securityUpdate.smsb&gt;

CVSS Metrics

Group	Score	Vector
Base	10	AV:N/AC:L/Au:N/C:C/I:C/A:C
Temporal	7.8	E:POC/RL:OF/RC:ND
Environmental	7.8	CDP:ND/TD:ND/CR:ND/IR:ND/AR:ND

References

• <https://bugs.chromium.org/p/project-zero/issues/detail?id=2002&gt;
• <https://security.samsungmobile.com/securityUpdate.smsb&gt;
• <https://www.youtube.com/watch?v=nke8Z3G4jnc&gt;

Acknowledgements

This vulnerability was published by Mateusz Jurczyk at Google Project Zero.

This document was written by Eric Hatleback.

Other Information

CVE IDs:	CVE-2020-8899
Date Public:	2020-01-28 Date First Published: