CVE-2021-3595

Severity CVSS v4.0:

Pending analysis

Type:

CWE-824 Access of Uninitialized Pointer

Publication date:

15/06/2021

Last modified:

07/11/2023

Description

An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the size of the &#39;tftp_t&#39; structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0.

Impact

Vector 3.x

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

Base Score: 3.80 LOW
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

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

Base Score 3.x

3.80

Severity 3.x

LOW

Vector 2.0

AV:L/AC:L/Au:N/C:P/I:N/A:N CVSS v2.0 Severity and Metrics:

Base Score: 2.10 LOW
Vector: AV:L/AC:L/Au:N/C:P/I:N/A:N

Attack Vector (AV): Local
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): Physical
Integrity (I): None
Availability (A): None

Base Score 2.0

2.10

Severity 2.0

LOW

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:libslirp_project:libslirp::::::::		4.6.0 (excluding)
cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
cpe:2.3:o:redhat:enterprise_linux:8.0::::advanced_virtualization:::
cpe:2.3:o:debian:debian_linux:9.0:::::::*
cpe:2.3:o:fedoraproject:fedora:33:::::::*
cpe:2.3:o:fedoraproject:fedora:34:::::::*

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

CPE	From	Up to
cpe:2.3:a:libslirp_project:libslirp::::::::		4.6.0 (excluding)
cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
cpe:2.3:o:redhat:enterprise_linux:8.0::::advanced_virtualization:::
cpe:2.3:o:debian:debian_linux:9.0:::::::*
cpe:2.3:o:fedoraproject:fedora:33:::::::*
cpe:2.3:o:fedoraproject:fedora:34:::::::*

CVE-2021-3595

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools