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ubuntucveUbuntu.comUB:CVE-2021-33033
HistoryMay 14, 2021 - 12:00 a.m.

CVE-2021-33033

2021-05-1400:00:00
ubuntu.com
ubuntu.com
54

4.6 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:P/I:P/A:P

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

0.001 Low

EPSS

Percentile

36.3%

The Linux kernel before 5.11.14 has a use-after-free in cipso_v4_genopt in
net/ipv4/cipso_ipv4.c because the CIPSO and CALIPSO refcounting for the DOI
definitions is mishandled, aka CID-ad5d07f4a9cd. This leads to writing an
arbitrary value.

Notes

Author Note
sbeattie looks to be introduced primarily in d7cce01504a0 1165affd484889d4986cf3b724318935a0b120d8 seems like an unrelated separate issue?
OSVersionArchitecturePackageVersionFilename
ubuntu20.10noarchlinux< 5.8.0-55.62UNKNOWN
ubuntu16.04noarchlinux< 4.4.0-222.255UNKNOWN
ubuntu18.04noarchlinux< 4.15.0-144.148UNKNOWN
ubuntu20.04noarchlinux< 5.4.0-73.82UNKNOWN
ubuntu20.04noarchlinux-aws< 5.4.0-1048.50UNKNOWN
ubuntu20.10noarchlinux-aws< 5.8.0-1035.37UNKNOWN
ubuntu16.04noarchlinux-aws< 4.4.0-1138.152UNKNOWN
ubuntu14.04noarchlinux-aws< 4.4.0-1102.107UNKNOWN
ubuntu18.04noarchlinux-aws< 4.15.0-1103.110UNKNOWN
ubuntu18.04noarchlinux-aws-5.4< 5.4.0-1048.50~18.04.1UNKNOWN
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4.6 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:L/AC:L/Au:N/C:P/I:P/A:P

7.8 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

0.001 Low

EPSS

Percentile

36.3%