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.

CVSS v3.0 7.8 HIGH
CVSS v2.0 4.6 MEDIUM

7.8^/10

CVSS v3.0 : HIGH

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

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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ad5d07f4a9cd671233ae20983848874731102c08	Mailing List Patch Vendor 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://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

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Configurations

Configuration 1 (hide)

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

Information

Published : 2021-05-14 16:15

Updated : 2021-06-09 11:37

NVD link : CVE-2021-33033

Mitre link : CVE-2021-33033

JSON object : View

CWE

CWE-416

Use After Free

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Products Affected

linux

linux_kernel

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