CVE-2026-40892— PJSIP: Stack buffer overflow in pjsip_auth_create_digest2()

PJSIP: Stack buffer overflow in pjsip_auth_create_digest2()

PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, a stack buffer overflow exists in pjsip_auth_create_digest2() in PJSIP when using pre-computed digest credentials (PJSIP_CRED_DATA_DIGEST). The function copies credential data using cred_info->data.slen as the length without an upper-bound check, which can overflow the fixed-size ha1 stack buffer (128 bytes) if data.slen exceeds the expected digest string length.

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栈缓冲区溢出

PJSIP 安全漏洞

PJSIP是pjsip开源的一个免费和开源的多媒体通信库，用C语言编写，实现基于标准的协议，如SIP, SDP, RTP, STUN, TURN，和ICE。 PJSIP 2.16及之前版本存在安全漏洞，该漏洞源于pjsip_auth_create_digest2函数在使用预计算摘要凭据时，复制凭据数据未进行上限检查，可能导致栈缓冲区溢出。

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