CVE-2019-11873

描述

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.

如何修補 CVE-2019-11873

要修補 CVE-2019-11873,請將受影響套件升級到下列已修補版本。

• —升級至 4.1.0+dfsg-1 或更新版本

CVE-2019-11873 正在被利用嗎?

中等 — EPSS 為 8.8%,可持續追蹤但非最高優先。

受影響套件(1)

• from 0, < 4.1.0+dfsg-1

CVSS 分數

參考連結(1)

• ADVISORYsecurity-tracker.debian.org/tracker/CVE-2019-11873