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OVAL Definitions
>
OVAL Definition Details
Id
oval:ru.altx-soft.nix:def:170966
[Eng]
Version
1
Class
patch
ALTXid
381835
Language
Russian
Severity
High
Title
Обновление USN-5292-1 -- уязвимости snapd
Description
James Troup discovered that snap did not properly manage the permissions forthe snap directories.
A local attacker could possibly use this issue to exposesensitive information. (CVE-2021-3155)
Family
unix
Platform
Linux Mint 19.x
Linux Mint 20.x
Ubuntu 18.04
Ubuntu 20.04
Ubuntu 21.10
Product
snapd
Reference
VENDOR: USN-5292-1
VENDOR: USN-5292-1
Id:
USN-5292-1
Reference:
https://ubuntu.com/security/notices/USN-5292-1
CVE: CVE-2021-3155
CVE: CVE-2021-3155
Id:
CVE-2021-3155
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3155
Comment
: snapd 2.54.2 and earlier created ~/snap directories in user home directories without specifying owner-only permissions. This could allow a local attacker to read information that should have been private. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1
CVSSv2 Score:
2.1
Access vector:
LOCAL
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
NONE
Availability impact:
NONE
CVSSv2 Vector:
AV:L/AC:L/Au:N/C:P/I:N/A:N
CVSSv3 Score:
5.5
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
LOW
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
NONE
Availability impact:
NONE
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CWE:
276 (Incorrect Default Permissions)
References:
https://github.com/snapcore/snapd/commit/6bcaeeccd16ed8298a301dd92f6907f88c24cc85 (MISC)
https://ubuntu.com/security/notices/USN-5292-1 (MISC)
https://github.com/snapcore/snapd/commit/7d2a966620002149891446a53cf114804808dcca (MISC)
CVE: CVE-2021-4120
CVE: CVE-2021-4120
Id:
CVE-2021-4120
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4120
Comment
: snapd 2.54.2 fails to perform sufficient validation of snap content interface and layout paths, resulting in the ability for snaps to inject arbitrary AppArmor policy rules via malformed content interface and layout declarations and hence escape strict snap confinement. Fixed in snapd versions 2.54.3+18.04, 2.54.3+20.04 and 2.54.3+21.10.1
CVSSv2 Score:
4.6
Access vector:
LOCAL
Access complexity:
LOW
Authentication:
NONE
Confidentiality impact:
PARTIAL
Integrity impact:
PARTIAL
Availability impact:
PARTIAL
CVSSv2 Vector:
AV:L/AC:L/Au:N/C:P/I:P/A:P
CVSSv3 Score:
7.8
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
LOW
User interaction:
NONE
Scope:
UNCHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE:
20 (Improper Input Validation)
References:
https://ubuntu.com/security/notices/USN-5292-1 (MISC)
https://bugs.launchpad.net/snapd/+bug/1949368 (MISC)
[oss-security] 20220218 CVE-2021-4120: Insufficient validation of snap content interface and layout paths (MLIST)
FEDORA-2022-82bea71e5a ()
FEDORA-2022-5df8b52ba4 ()
CVE: CVE-2021-44730
CVE: CVE-2021-44730
Id:
CVE-2021-44730
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44730
Comment
: snapd 2.54.2 did not properly validate the location of the snap-confine binary. A local attacker who can hardlink this binary to another location to cause snap-confine to execute other arbitrary binaries 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
CVSSv2 Score:
6.9
Access vector:
LOCAL
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
COMPLETE
Integrity impact:
COMPLETE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSSv3 Score:
8.8
Attack vector:
LOCAL
Attack complexity:
LOW
Privileges required:
LOW
User interaction:
NONE
Scope:
CHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE:
59 (Improper Link Resolution Before File Access ('Link Following'))
References:
https://ubuntu.com/security/notices/USN-5292-1 (MISC)
[oss-security] 20220218 CVE-2021-4120: Insufficient validation of snap content interface and layout paths (MLIST)
DSA-5080 (DEBIAN)
[oss-security] 20220223 Re: CVE-2021-44731: Race condition in snap-confine's setup_private_mount() (MLIST)
FEDORA-2022-82bea71e5a ()
FEDORA-2022-5df8b52ba4 ()
CVE: CVE-2021-44731
CVE: CVE-2021-44731
Id:
CVE-2021-44731
Reference:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-44731
Comment
: 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
CVSSv2 Score:
6.9
Access vector:
LOCAL
Access complexity:
MEDIUM
Authentication:
NONE
Confidentiality impact:
COMPLETE
Integrity impact:
COMPLETE
Availability impact:
COMPLETE
CVSSv2 Vector:
AV:L/AC:M/Au:N/C:C/I:C/A:C
CVSSv3 Score:
7.8
Attack vector:
LOCAL
Attack complexity:
HIGH
Privileges required:
LOW
User interaction:
NONE
Scope:
CHANGED
Confidentiality impact:
HIGH
Integrity impact:
HIGH
Availability impact:
HIGH
CVSSv3 Vector:
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE:
362 (Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition'))
References:
https://ubuntu.com/security/notices/USN-5292-1 (MISC)
[oss-security] 20220218 CVE-2021-4120: Insufficient validation of snap content interface and layout paths (MLIST)
DSA-5080 (DEBIAN)
[oss-security] 20220223 Re: CVE-2021-44731: Race condition in snap-confine's setup_private_mount() (MLIST)
[oss-security] 20220223 Re: CVE-2021-44731: Race condition in snap-confine's setup_private_mount() (MLIST)
[oss-security] 20221130 Race condition in snap-confine's must_mkdir_and_open_with_perms() (CVE-2022-3328) (MLIST)
20221208 Race condition in snap-confine's must_mkdir_and_open_with_perms() (CVE-2022-3328) (FULLDISC)
http://packetstormsecurity.com/files/170176/snap-confine-must_mkdir_and_open_with_perms-Race-Condition.html (MISC)
FEDORA-2022-82bea71e5a ()
FEDORA-2022-5df8b52ba4 ()
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