漏洞信息
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Vulnerability Title
FFmpeg Out-of-Bounds Read in DASH Demuxer via dashdec.c
Vulnerability Description
FFmpeg before commit 65b0dab contains an out-of-bounds read in the DASH demuxer (libavformat/dashdec.c). When a live DASH manifest is refreshed with a startNumber that is lower than the previous value, the current sequence number is driven negative. The fragment retrieval function checked only the upper bound before indexing the fragments array, allowing a negative index to be used and causing an out-of-bounds read. A malicious or misconfigured DASH server can trigger this by serving a live manifest with a decreasing startNumber across a manifest refresh.
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
Vulnerability Type
跨界内存读
Vulnerability Title
FFmpeg 缓冲区错误漏洞
Vulnerability Description
FFmpeg是FFmpeg组织开源的一个多媒体处理框架。 FFmpeg 65b0dab之前版本存在缓冲区错误漏洞,该漏洞源于DASH demuxer(libavformat/dashdec.c)在处理实时DASH清单刷新时未正确检查fragments数组索引的下界,允许负索引越界读取,恶意或配置错误的DASH服务器利用递减的startNumber可触发该漏洞。
CVSS Information
N/A
Vulnerability Type
N/A