Vulnerability CVE-2021-24032

Vulnerability Name:

CVE-2021-24032 (CCN-197738)

Assigned:

2021-03-01

Published:

2021-03-01

Updated:

2021-04-28

Summary:

Beginning in v1.4.1 and prior to v1.4.9, due to an incomplete fix for CVE-2021-24031, the Zstandard command-line utility created output files with default permissions and restricted those permissions immediately afterwards. Output files could therefore momentarily be readable or writable to unintended parties.

CVSS v3 Severity:

4.7 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N)
4.1 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): High Privileges Required (PR): Low User Interaction (UI): None
Scope:	Scope (S): Unchanged
Impact Metrics:	Confidentiality (C): High Integrity (I): None Availibility (A): None

9.1 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N)
7.9 High (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C)

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

CVSS v2 Severity:

1.9 Low (CVSS v2 Vector: AV:L/AC:M/Au:N/C:P/I:N/A:N)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Medium Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): None Availibility (A): None

9.4 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:C/I:C/A:N)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): None

Vulnerability Type:

CWE-276

Vulnerability Consequences:

Bypass Security

References:

Source: MITRE
Type: CNA
CVE-2021-24032

Source: MISC
Type: Patch, Third Party Advisory
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=982519

Source: XF
Type: UNKNOWN
facebook-cve202124032-sec-bypass(197738)

Source: MISC
Type: Issue Tracking, Patch, Third Party Advisory
https://github.com/facebook/zstd/issues/2491

Source: CCN
Type: Facebook Web site
CVE-2021-24032

Source: MISC
Type: Third Party Advisory
https://www.facebook.com/security/advisories/cve-2021-24032

Vulnerable Configuration:

Configuration 1:

cpe:/a:facebook:zstandard:*:*:*:*:*:*:*:* (Version >= 1.4.1 and < 1.4.9)

Configuration CCN 1:

cpe:/a:facebook:zstandard:1.4.1:*:*:*:*:*:*:*

OR cpe:/a:facebook:zstandard:1.4.2:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:3586	P	libdmx1-1.1.3-3.51 on GA media (Moderate)	2022-06-28
oval:org.opensuse.security:def:94698	P	librrd8-1.7.0-6.3.1 on GA media (Moderate)	2022-06-22
oval:org.opensuse.security:def:237	P	libzstd-devel-1.4.4-1.6.1 on GA media (Moderate)	2022-06-13
oval:org.opensuse.security:def:1166	P	Security update for openldap2 (Important)	2022-05-16
oval:org.opensuse.security:def:102252	P	Security update for mariadb (Important)	2022-03-04
oval:org.opensuse.security:def:101411	P	xen-4.14.1_16-1.6 on GA media (Moderate)	2021-08-10
oval:org.opensuse.security:def:71996	P	libzstd-devel-1.4.4-1.6.1 on GA media (Moderate)	2021-08-09
oval:org.opensuse.security:def:62255	P	libzstd-devel-1.4.4-1.6.1 on GA media (Moderate)	2021-08-09
oval:org.opensuse.security:def:5991	P	Security update for MozillaFirefox (Important)	2021-03-31
oval:org.opensuse.security:def:111293	P	Security update for zstd (Moderate)	2021-03-27
oval:org.opensuse.security:def:117591	P	Security update for zstd (Moderate)	2021-03-24
oval:org.opensuse.security:def:95539	P	Security update for zstd (Moderate)	2021-03-24
oval:org.opensuse.security:def:97344	P	Security update for zstd (Moderate)	2021-03-24
oval:org.opensuse.security:def:100719	P	(Moderate)	2021-03-24
oval:org.opensuse.security:def:64675	P	Security update for zstd (Moderate)	2021-03-24
oval:org.opensuse.security:def:73797	P	Security update for zstd (Moderate)	2021-03-24
oval:org.opensuse.security:def:67080	P	Security update for zstd (Moderate)	2021-03-24
oval:org.opensuse.security:def:76148	P	Security update for zstd (Moderate)	2021-03-24
oval:org.opensuse.security:def:108077	P	Security update for zstd (Moderate)	2021-03-24
oval:org.opensuse.security:def:42163	P	Security update for zstd (Moderate)	2021-03-24
oval:org.opensuse.security:def:100386	P	(Moderate)	2021-03-24
oval:org.opensuse.security:def:108918	P	Security update for zstd (Moderate)	2021-03-24

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