Out-of-Bounds Affecting wolfssl package, versions [0,]


Severity

Recommended
0.0
critical
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
6.9% (91st percentile)

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  • Snyk IDSNYK-CONAN-WOLFSSL-10078503
  • published8 May 2025
  • disclosed23 May 2019
  • creditUnknown

Introduced: 23 May 2019

CVE-2019-11873  (opens in a new tab)
CWE-119  (opens in a new tab)

How to fix?

There is no fixed version for wolfssl.

Overview

Affected versions of this package are vulnerable to Out-of-Bounds wolfSSL 4.0.0 has a Buffer Overflow in DoPreSharedKeys in tls13.c when a current identity size is greater than a client identity size. An attacker sends a crafted hello client packet over the network to a TLSv1.3 wolfSSL server. The length fields of the packet: record length, client hello length, total extensions length, PSK extension length, total identity length, and identity length contain their maximum value which is 2^16. The identity data field of the PSK extension of the packet contains the attack data, to be stored in the undefined memory (RAM) of the server. The size of the data is about 65 kB. Possibly the attacker can perform a remote code execution attack.

CVSS Base Scores

version 3.1