漏洞信息
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Vulnerability Title
libssh2 Double-Free Heap Corruption via sftp_open()
Vulnerability Description
libssh2 through 1.11.1, fixed in commit 5e47761, contains a double-free vulnerability in the sftp_open() function in src/sftp.c that allows a malicious SSH server to corrupt the heap of any authenticated client opening an SFTP session. When a server responds to SSH_FXP_OPEN with SSH_FXP_STATUS containing FX_OK, the response data buffer is freed, and if a subsequent sftp_packet_require() call returns a specific error such as LIBSSH2_ERROR_CHANNEL_PACKET_EXCEEDED, the same pointer is freed a second time, enabling tcache dup conditions on glibc systems that allow overlapping allocations and function pointer overwrites.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Vulnerability Type
双重释放
Vulnerability Title
libssh2 资源管理错误漏洞
Vulnerability Description
libssh2是libssh2团队开源的一款实现SSH2协议的客户端C库。 libssh2 1.11.1及之前版本存在资源管理错误漏洞,该漏洞源于sftp_open()函数中存在双重释放,可能导致恶意SSH服务器破坏任何打开SFTP会话的已验证客户端的堆。
CVSS Information
N/A
Vulnerability Type
N/A