IM
IronMonkey Threat Research

CVE-2023-3611 HIGH

Published: 2023-07-21 | Last Modified: 2025-02-13 | Status: Modified

Description

An out-of-bounds write vulnerability in the Linux kernel's net/sched: sch_qfq component can be exploited to achieve local privilege escalation. The qfq_change_agg() function in net/sched/sch_qfq.c allows an out-of-bounds write because lmax is updated according to packet sizes without bounds checks. We recommend upgrading past commit 3e337087c3b5805fe0b8a46ba622a962880b5d64.

CVSS Metrics

Base Score: 7.8 (HIGH)

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

Attack VectorLOCAL
Attack ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
ScopeUNCHANGED
Confidentiality ImpactHIGH
Integrity ImpactHIGH
Availability ImpactHIGH

Source: [email protected]

Type: Primary

Exploitability Score: 1.8

Impact Score: 5.9

Weaknesses

Source Type Description
[email protected] Secondary
en CWE-787
[email protected] Primary
en CWE-787

Affected Products

Vendor Product Version Update Type
linux linux_kernel * <built-in method update of dict object at 0x7fd386744a80> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd2a2df9680> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd384a646c0> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd384ab48c0> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd384ab6440> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd384ab6400> Operating System
linux linux_kernel * <built-in method update of dict object at 0x7fd384e114c0> Operating System
linux linux_kernel 6.5 <built-in method update of dict object at 0x7fd384a65600> Operating System
debian debian_linux 10.0 <built-in method update of dict object at 0x7fd384e12900> Operating System
debian debian_linux 11.0 <built-in method update of dict object at 0x7fd384ab7c00> Operating System
debian debian_linux 12.0 <built-in method update of dict object at 0x7fd340a12a40> Operating System

Affected Configurations

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Yes cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*

Operator: OR

Vulnerable CPE
Yes cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
Yes cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
Yes cpe:2.3:o:debian:debian_linux:12.0:*:*:*:*:*:*:*

References