CVE-2021-33033

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-33033
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.

7.8 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

4.6 /10

CVSS v2.0 : MEDIUM

V2 Legend

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

Exploitability : 3.9 / Impact : 6.4

Access Vector LOCAL

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References
Link Resource
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.14 Mailing List Patch Vendor Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7 Mailing List Patch Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8 Mailing List Patch Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad5d07f4a9cd671233ae20983848874731102c08 Mailing List Patch Vendor Advisory
https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-cipso_v4_genopt Exploit Third Party Advisory
https://syzkaller.appspot.com/bug?id=96e7d345748d8814901c91cd92084ed04b46701e Exploit Mailing List Third Party Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.14 Mailing List Patch Vendor Advisory
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7 Mailing List Patch Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8 Mailing List Patch Vendor Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad5d07f4a9cd671233ae20983848874731102c08 Mailing List Patch Vendor Advisory
https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-cipso_v4_genopt Exploit Third Party Advisory
https://syzkaller.appspot.com/bug?id=96e7d345748d8814901c91cd92084ed04b46701e Exploit Mailing List Third Party Advisory
Configurations

Configuration 1 (hide)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
History

21 Nov 2024, 06:08

Type Values Removed Values Added
References () https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.14 - Mailing List, Patch, Vendor Advisory () https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.14 - Mailing List, Patch, Vendor Advisory
References () https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7 - Mailing List, Patch, Vendor Advisory () https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7 - Mailing List, Patch, Vendor Advisory
References () https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8 - Mailing List, Patch, Vendor Advisory () https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8 - Mailing List, Patch, Vendor Advisory
References () https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad5d07f4a9cd671233ae20983848874731102c08 - Mailing List, Patch, Vendor Advisory () https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad5d07f4a9cd671233ae20983848874731102c08 - Mailing List, Patch, Vendor Advisory
References () https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-cipso_v4_genopt - Exploit, Third Party Advisory () https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-cipso_v4_genopt - Exploit, Third Party Advisory
References () https://syzkaller.appspot.com/bug?id=96e7d345748d8814901c91cd92084ed04b46701e - Exploit, Mailing List, Third Party Advisory () https://syzkaller.appspot.com/bug?id=96e7d345748d8814901c91cd92084ed04b46701e - Exploit, Mailing List, Third Party Advisory

09 Jun 2021, 18:37

Type Values Removed Values Added
CVSS v2 : 2.1
v3 : 5.5 		v2 : 4.6
v3 : 7.8

24 May 2021, 19:26

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
References (MISC) https://syzkaller.appspot.com/bug?id=96e7d345748d8814901c91cd92084ed04b46701e - (MISC) https://syzkaller.appspot.com/bug?id=96e7d345748d8814901c91cd92084ed04b46701e - Exploit, Mailing List, Third Party Advisory
References (MISC) https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-cipso_v4_genopt - (MISC) https://sites.google.com/view/syzscope/kasan-use-after-free-read-in-cipso_v4_genopt - Exploit, Third Party Advisory
References (MISC) https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8 - (MISC) https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1165affd484889d4986cf3b724318935a0b120d8 - Mailing List, Patch, Vendor Advisory
References (MISC) https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.14 - (MISC) https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.14 - Mailing List, Patch, Vendor Advisory
References (MISC) https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7 - (MISC) https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.7 - Mailing List, Patch, Vendor Advisory
References (MISC) https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad5d07f4a9cd671233ae20983848874731102c08 - (MISC) https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad5d07f4a9cd671233ae20983848874731102c08 - Mailing List, Patch, Vendor Advisory
CWE CWE-416
CVSS v2 : unknown
v3 : unknown 		v2 : 2.1
v3 : 5.5
Information

Published : 2021-05-14 23:15

Updated : 2024-11-21 06:08

NVD link : CVE-2021-33033

Mitre link : CVE-2021-33033

CVE.ORG link : CVE-2021-33033

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

Use After Free