CVE-2021-47240

Severity CVSS v4.0:

Pending analysis

Type:

CWE-125 Out-of-bounds Read

Publication date:

21/05/2024

Last modified:

30/12/2024

Description

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: fix OOB Read in qrtr_endpoint_post Syzbot reported slab-out-of-bounds Read in qrtr_endpoint_post. The problem was in wrong _size_ type: if (len != ALIGN(size, 4) + hdrlen) goto err; If size from qrtr_hdr is 4294967293 (0xfffffffd), the result of ALIGN(size, 4) will be 0. In case of len == hdrlen and size == 4294967293 in header this check won&#39;t fail and skb_put_data(skb, data + hdrlen, size); will read out of bound from data, which is hdrlen allocated block.

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.10 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): None
Availability (A): High

Base Score 3.x

7.10

Severity 3.x

HIGH

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:o:linux:linux_kernel::::::::	4.15 (including)	4.19.196 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	4.20 (including)	5.4.128 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.5 (including)	5.10.46 (excluding)
cpe:2.3:o:linux:linux_kernel::::::::	5.11 (including)	5.12.13 (excluding)
cpe:2.3:o:linux:linux_kernel:5.13:rc1::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc2::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc3::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc4::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc5::::::
cpe:2.3:o:linux:linux_kernel:5.13:rc6::::::

To consult the complete list of CPE names with products and versions, see this page

CVE-2021-47240

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools