CVE-2020-1917

Severity CVSS v4.0:

Pending analysis

Type:

CWE-787 Out-of-bounds Write

Publication date:

10/03/2021

Last modified:

17/03/2021

Description

xbuf_format_converter, used as part of exif_read_data, was appending a terminating null character to the generated string, but was not using its standard append char function. As a result, if the buffer was full, it would result in an out-of-bounds write. This issue affects HHVM versions prior to 4.56.3, all versions between 4.57.0 and 4.80.1, all versions between 4.81.0 and 4.93.1, and versions 4.94.0, 4.95.0, 4.96.0, 4.97.0, 4.98.0.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.80 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

9.80

Severity 3.x

CRITICAL

Vector 2.0

AV:N/AC:L/Au:N/C:P/I:P/A:P CVSS v2.0 Severity and Metrics:

Base Score: 7.50 HIGH
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0

7.50

Severity 2.0

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:facebook:hhvm::::::::		4.56.3 (excluding)
cpe:2.3:a:facebook:hhvm::::::::	4.57.0 (including)	4.80.2 (excluding)
cpe:2.3:a:facebook:hhvm::::::::	4.81.0 (including)	4.93.2 (excluding)
cpe:2.3:a:facebook:hhvm:4.94.0:::::::*
cpe:2.3:a:facebook:hhvm:4.95.0:::::::*
cpe:2.3:a:facebook:hhvm:4.96.0:::::::*
cpe:2.3:a:facebook:hhvm:4.97.0:::::::*
cpe:2.3:a:facebook:hhvm:4.98.0:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2020-1917

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools