CVE-2021-47240

net: qrtr: fix OOB Read in qrtr_endpoint_post

Severity Score

"-"

*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

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't fail and

skb_put_data(skb, data + hdrlen, size);

will read out of bound from data, which is hdrlen allocated block.

En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: qrtr: arreglar OOB Lectura en qrtr_endpoint_post. Syzbot reportó slab-out-of-bounds Lectura en qrtr_endpoint_post. El problema estaba en el tipo de _tamaño_ incorrecto: if (len != ALIGN(size, 4) + hdrlen) goto err; Si el tamaño de qrtr_hdr es 4294967293 (0xfffffffd), el resultado de ALIGN(size, 4) será 0. En caso de len == hdrlen y size == 4294967293 en el encabezado, esta verificación no fallará y skb_put_data(skb, data + hdrlen, tamaño); leerá fuera de los límites de los datos, que son bloques asignados hdrlen.

*Credits: N/A

CVSS Scores

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-04-10 CVE Reserved
2024-05-21 CVE Published
2024-05-22 EPSS Updated
2024-08-04 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (6)

URL	Tag	Source
https://git.kernel.org/stable/c/194ccc88297ae78d0803adad83c6dcc369787c9e	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/f8111c0d7ed42ede41a3d0d393b104de0730a8a6	2021-06-30
https://git.kernel.org/stable/c/26b8d10703a9be45d6097946b2b4011f7dd2c56f	2021-06-23
https://git.kernel.org/stable/c/960b08dd36de1e341e3eb43d1c547513e338f4f8	2021-06-23
https://git.kernel.org/stable/c/19892ab9c9d838e2e5a7744d36e4bb8b7c3292fe	2021-06-23
https://git.kernel.org/stable/c/ad9d24c9429e2159d1e279dc3a83191ccb4daf1d	2021-06-14

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.15 < 4.19.196 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 4.19.196"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.15 < 5.4.128 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 5.4.128"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.15 < 5.10.46 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 5.10.46"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.15 < 5.12.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 5.12.13"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.15 < 5.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.15 < 5.13"		en		Affected