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云安全日报210326：Ubuntu OpenSSL传输协议工具包发现拒绝服务漏洞，需要尽快升级

来源：说长论短网编辑：热点时间：2026-11-14

OpenSSL是一个健壮的、商业级的、功能齐全的、用于传输层安全（TL云安S）协议（以前称为安全套接字层（SSL）协议）的开源工具包。

3月25日，U全日buntu发布了安全更新,修复了OpenSSL传输协议工具包发现的拒绝服务等报2重要漏洞。以下是漏洞详情：

漏洞详情

来源:https://ubuntu.co10m/security/notices/USN-4891-1

CVE-2021-343249 严重程度：高

OpenSSL错误地处理了某些重新协商

ClientHello消6：息。远程攻击者可以使用此问题导致

OpenSSL崩溃，从而导致拒绝服务。

受影响产品Ub和版本

上述漏洞影响Ubuntu 20.10,Ubuntu 20.04 LTS,unUbuntu 18.04 LTS

解决方案

可以通过将系统更新为以下软件包版本来解决此问tu题：

Ubuntu 20.10:

libssl1.1 - 1.1.1f-1ubu Ontu4.3

Ubuntu 20.04:

libssl1.1 - 1.1.1f-1ubpeuntu2.3

Ubuntu 18.04:

libssl1.1 - 1.1.1-1nSubuntu2.1~18.04.9

查看更多漏洞信息以及升级请访问官网：

hSLttps://ubuntu.com/security/cve

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