漏洞信息
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Vulnerability Title
PJSIP: Stack overflow parsing a TLS peer certificate's SubjectAltName in GnuTLS backend
Vulnerability Description
PJSIP is a free and open source multimedia communication library written in C. Prior to commit c4a151a, a stack buffer overflow exists in the GnuTLS TLS backend when parsing the Subject Alternative Name extension of a peer certificate (tls_cert_get_info() in ssl_sock_gtls.c). Only GnuTLS builds are affected (--with-gnutls); OpenSSL and Apple SecureTransport/Network.framework builds are not affected. While extracting certificate information after a TLS handshake, an incorrect buffer-size value can cause an oversized SubjectAltName entry to be written past the end of a fixed-size stack buffer. A network-positioned attacker presenting a crafted certificate — a malicious server to a connecting client, or a malicious client to a server that requests certificates — can trigger this during the TLS handshake, before any SIP-level authentication. Impact may range from unexpected application termination to control flow hijack/memory corruption. This issue has been patched via commit c4a151a.
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Vulnerability Type
栈缓冲区溢出
Vulnerability Title
PJSIP 缓冲区错误漏洞
Vulnerability Description
PJSIP是pjsip团队开源的一款支持多种协议的多媒体通信中间件。 PJSIP c4a151a之前版本存在缓冲区错误漏洞,该漏洞源于GnuTLS TLS后端在解析对端证书的Subject Alternative Name扩展时缓冲区大小计算错误,导致栈缓冲区溢出;网络位置攻击者可通过特制证书在TLS握手期间触发,可能造成应用程序意外终止、内存损坏或控制流劫持。
CVSS Information
N/A
Vulnerability Type
N/A