Existing TLS connections can be reused without checking remote hostname

PJSIP is a free and open source multimedia communication library written in C language implementing standard based protocols such as SIP, SDP, RTP, STUN, TURN, and ICE. In version 2.10 and earlier, PJSIP transport can be reused if they have the same IP address + port + protocol. However, this is insufficient for secure transport since it lacks remote hostname authentication. Suppose we have created a TLS connection to `sip.foo.com`, which has an IP address `100.1.1.1`. If we want to create a TLS connection to another hostname, say `sip.bar.com`, which has the same IP address, then it will reuse that existing connection, even though `100.1.1.1` does not have certificate to authenticate as `sip.bar.com`. The vulnerability allows for an insecure interaction without user awareness. It affects users who need access to connections to different destinations that translate to the same address, and allows man-in-the-middle attack if attacker can route a connection to another destination such as in the case of DNS spoofing.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N

对宿主不匹配的证书验证不恰当

Sauwming pjproject 安全漏洞

Sauwming pjproject是 Sauwming开源的一个应用软件。将信令协议（SIP）与丰富的多媒体框架和NAT遍历功能结合在一起，成为可移植的高级API，适用于从台式机，嵌入式系统到手机等几乎所有类型的系统。 pjproject 存在安全漏洞，该漏洞源于缺乏远程主机名身份验证。

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