CVE-2021-44731

A race condition existed in the snapd 2.54.2 snap-confine binary when preparing a private mount namespace for a snap. This could allow a local attacker to gain root privileges by bind-mounting their own contents inside the snap's private mount namespace and causing snap-confine to execute arbitrary code and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1

CVSS v3 7.8 HIGH
CVSS v2.0 6.9 MEDIUM

7.8^/10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.1 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

6.9^/10

CVSS v2.0 : MEDIUM

V2 Legend

Vector : AV:L/AC:M/Au:N/C:C/I:C/A:C

Exploitability : 3.4 / Impact : 10.0

Access Vector LOCAL

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html	Exploit Third Party Advisory VDB Entry
http://seclists.org/fulldisclosure/2022/Dec/4	Exploit Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/02/18/2	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/02/23/1	Exploit Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/02/23/2	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/11/30/2	Exploit Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/
https://ubuntu.com/security/notices/USN-5292-1	Patch Vendor Advisory
https://www.debian.org/security/2022/dsa-5080	Issue Tracking Third Party Advisory
http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html	Exploit Third Party Advisory VDB Entry
http://seclists.org/fulldisclosure/2022/Dec/4	Exploit Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/02/18/2	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/02/23/1	Exploit Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/02/23/2	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/11/30/2	Exploit Mailing List Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/
https://ubuntu.com/security/notices/USN-5292-1	Patch Vendor Advisory
https://www.debian.org/security/2022/dsa-5080	Issue Tracking Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:20.04::::lts:::
	cpe:2.3:o:canonical:ubuntu_linux:21.10:::::::*

Configuration 3 (hide)

OR	cpe:2.3:o:fedoraproject:fedora:34:::::::*
	cpe:2.3:o:fedoraproject:fedora:35:::::::*

Configuration 4 (hide)

OR	cpe:2.3:o:debian:debian_linux:10.0:::::::*
	cpe:2.3:o:debian:debian_linux:11.0:::::::*

History

21 Nov 2024, 06:31

Type	Values Removed	Values Added
References	~~() http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html - Exploit, Third Party Advisory, VDB Entry~~	() http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html - Exploit, Third Party Advisory, VDB Entry
References	~~() http://seclists.org/fulldisclosure/2022/Dec/4 - Exploit, Mailing List, Third Party Advisory~~	() http://seclists.org/fulldisclosure/2022/Dec/4 - Exploit, Mailing List, Third Party Advisory
References	~~() http://www.openwall.com/lists/oss-security/2022/02/18/2 - Mailing List, Third Party Advisory~~	() http://www.openwall.com/lists/oss-security/2022/02/18/2 - Mailing List, Third Party Advisory
References	~~() http://www.openwall.com/lists/oss-security/2022/02/23/1 - Exploit, Mailing List, Third Party Advisory~~	() http://www.openwall.com/lists/oss-security/2022/02/23/1 - Exploit, Mailing List, Third Party Advisory
References	~~() http://www.openwall.com/lists/oss-security/2022/02/23/2 - Mailing List, Third Party Advisory~~	() http://www.openwall.com/lists/oss-security/2022/02/23/2 - Mailing List, Third Party Advisory
References	~~() http://www.openwall.com/lists/oss-security/2022/11/30/2 - Exploit, Mailing List, Third Party Advisory~~	() http://www.openwall.com/lists/oss-security/2022/11/30/2 - Exploit, Mailing List, Third Party Advisory
References	~~() https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/ -~~	() https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/ -
References	~~() https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/ -~~	() https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/ -
References	~~() https://ubuntu.com/security/notices/USN-5292-1 - Patch, Vendor Advisory~~	() https://ubuntu.com/security/notices/USN-5292-1 - Patch, Vendor Advisory
References	~~() https://www.debian.org/security/2022/dsa-5080 - Issue Tracking, Third Party Advisory~~	() https://www.debian.org/security/2022/dsa-5080 - Issue Tracking, Third Party Advisory

01 Dec 2022, 01:15

Type	Values Removed	Values Added
References		(MLIST) http://www.openwall.com/lists/oss-security/2022/11/30/2 -

01 Mar 2022, 16:56

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : 6.9 v3 : 7.8
CPE		cpe:2.3:o:fedoraproject:fedora:34:::::::* cpe:2.3:o:debian:debian_linux:11.0:::::::* cpe:2.3:a:canonical:snapd:::::::: cpe:2.3:o:canonical:ubuntu_linux:20.04::::lts::: cpe:2.3:o:canonical:ubuntu_linux:18.04::::lts::: cpe:2.3:o:fedoraproject:fedora:35:::::::* cpe:2.3:o:canonical:ubuntu_linux:21.10:::::::* cpe:2.3:o:debian:debian_linux:10.0:::::::*
References	~~(MISC) https://ubuntu.com/security/notices/USN-5292-1 -~~	(MISC) https://ubuntu.com/security/notices/USN-5292-1 - Patch, Vendor Advisory
References	~~(FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/ -~~	(FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/ - Mailing List, Third Party Advisory
References	~~(MLIST) http://www.openwall.com/lists/oss-security/2022/02/23/2 -~~	(MLIST) http://www.openwall.com/lists/oss-security/2022/02/23/2 - Mailing List, Third Party Advisory
References	~~(FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/ -~~	(FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/ - Mailing List, Third Party Advisory
References	~~(MLIST) http://www.openwall.com/lists/oss-security/2022/02/18/2 -~~	(MLIST) http://www.openwall.com/lists/oss-security/2022/02/18/2 - Mailing List, Third Party Advisory
References	~~(MLIST) http://www.openwall.com/lists/oss-security/2022/02/23/1 -~~	(MLIST) http://www.openwall.com/lists/oss-security/2022/02/23/1 - Mailing List, Third Party Advisory
References	~~(DEBIAN) https://www.debian.org/security/2022/dsa-5080 -~~	(DEBIAN) https://www.debian.org/security/2022/dsa-5080 - Issue Tracking, Third Party Advisory
CWE		CWE-362

24 Feb 2022, 15:15

Type	Values Removed	Values Added
References		(MLIST) http://www.openwall.com/lists/oss-security/2022/02/23/1 - (MLIST) http://www.openwall.com/lists/oss-security/2022/02/23/2 -

21 Feb 2022, 11:15

Type	Values Removed	Values Added
References		(DEBIAN) https://www.debian.org/security/2022/dsa-5080 -

20 Feb 2022, 03:15

Type	Values Removed	Values Added
References		(FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/3QTBN7LLZISXIA4KU4UKDR27Q5PXDS2U/ - (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XCGHG6LJAVJJ72TMART6A7N4Z6MSTGI7/ -

18 Feb 2022, 10:15

Type	Values Removed	Values Added
References		(MLIST) http://www.openwall.com/lists/oss-security/2022/02/18/2 -

17 Feb 2022, 23:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2022-02-17 23:15

Updated : 2024-11-21 06:31

NVD link : CVE-2021-44731

Mitre link : CVE-2021-44731

CVE.ORG link : CVE-2021-44731

JSON object : View

Products Affected

canonical

snapd
ubuntu_linux

debian

debian_linux

fedoraproject

fedora

CWE

CWE-362

Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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This could allow a local attacker to gain root privileges by bind-mounting their own contents inside the snap's private mount namespace and causing snap-confine to execute arbitrary code and hence gain privilege escalation. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1"}, {"lang": "es", "value": "Se presentaba una condici\u00f3n de carrera en snapd versi\u00f3n 2.54.2 en el binario snap-confine cuando era preparado un espacio de nombres de montaje privado para un snap. Esto pod\u00eda permitir a un atacante local alcanzar privilegios de root al montar su propio contenido dentro del espacio de nombres de montaje privado del snap y causar que snap-confine ejecutara c\u00f3digo arbitrario y por lo tanto obtuviera una escalada de privilegios. Corregido en snapd versiones 2.54.3+18.04, 2.54.3+20.04 y 2.54.3+21.10.1"}], "lastModified": "2024-11-21T06:31:28.220", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:canonical:snapd:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "90115CE1-12C4-4504-A1A2-9C118694C398", "versionEndIncluding": "2.54.2"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "23A7C53F-B80F-4E6A-AFA9-58EEA84BE11D"}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:20.04:*:*:*:lts:*:*:*", "vulnerable": true, "matchCriteriaId": "902B8056-9E37-443B-8905-8AA93E2447FB"}, {"criteria": "cpe:2.3:o:canonical:ubuntu_linux:21.10:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "AAE4D2D0-CEEB-416F-8BC5-A7987DF56190"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835"}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}, {"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED"}], "operator": "OR"}]}], "sourceIdentifier": "security@ubuntu.com"}

7.8 /10