漏洞信息
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Vulnerability Title
libvncclient Tight decoder has an attacker-controlled heap out-of-bounds write
Vulnerability Description
LibVNCClient is a library for easy implementation of a VNC client. In versions 0.9.12 through 0.9.15, a malicious (or man-in-the-middle) VNC server can force a connecting `libvncclient` to write attacker-controlled data past the end of its framebuffer. This is an out-of-bounds heap write with attacker-controlled length, contents, and offset. It needs no authentication (the attacker
is the server), works in a default build with default settings, and fires from a single `FramebufferUpdate` the moment the victim connects. It crashes any client unconditionally (denial of service); we also demonstrated it overwriting an application callback pointer and redirecting execution to attacker-chosen code (code execution) under the default configuration. Commit 540332be3e0acc566fa64da6f1b4680c72c724dd patches the issue.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Vulnerability Type
堆缓冲区溢出
Vulnerability Title
LibVNCServer 缓冲区错误漏洞
Vulnerability Description
LibVNCServer是LibVNC组织开源的一个提供VNC远程桌面服务的服务器软件。 LibVNCServer 0.9.12版本至0.9.15版本存在缓冲区错误漏洞,该漏洞源于恶意VNC服务器可强制libvncclient将攻击者控制的数据写入帧缓冲区末尾之外,造成堆越界写入,可能导致拒绝服务和代码执行。
CVSS Information
N/A
Vulnerability Type
N/A