Buffer overflow in Mbed TLS

Published: 2023-10-10 | Updated: 2024-09-23

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2023-43615 CVE-2023-45199
CWE-ID	CWE-125 CWE-122
Exploitation vector	Network
Public exploit	N/A
Vulnerable software	mbed TLS Universal components / Libraries / Libraries used by multiple products
Vendor	ARM

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU81727

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-43615

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary condition. A remote attacker can send a malformed encrypted (or null-encrypted) record and perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

mbed TLS: 2.0.0 - 3.4.1

CPE2.3

External links

https://mbed-tls.readthedocs.io/en/latest/security-advisories/mbedtls-security-advisory-2023-10-1/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Heap-based buffer overflow

EUVDB-ID: #VU97655

Risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2023-45199

CWE-ID: CWE-122 - Heap-based Buffer Overflow