漏洞信息
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Vulnerability Title
YAML::Syck versions before 1.38 for Perl has an out-of-bounds read
Vulnerability Description
YAML::Syck versions before 1.38 for Perl has an out-of-bounds read. The base60 (sexagesimal) parsing code in perl_syck.h has a buffer underflow bug in both int#base60 and float#base60 handlers. When processing the leftmost segment of a colon-separated value (e.g., the 1 in 1:30:45), the inner while loop can decrement a pointer past the start of the string buffer: while ( colon >= ptr && *colon != ':' ) { colon--; } if ( *colon == ':' ) *colon = '\0'; // colon may be ptr-1 here When no colon is found (final/leftmost segment), colon becomes ptr-1, and the subsequent *colon dereference reads one byte before the allocated buffer.
CVSS Information
N/A
Vulnerability Type
缓冲区下溢
Vulnerability Title
YAML::Syck 安全漏洞
Vulnerability Description
YAML::Syck是CPAN Authors开源的一个Perl库。 YAML::Syck 1.38之前版本存在安全漏洞,该漏洞源于perl_syck.h中的base60解析代码存在缓冲区下溢,在处理冒号分隔值的最左段时,内部while循环可能将指针递减到字符串缓冲区起始位置之前,导致越界读取。
CVSS Information
N/A
Vulnerability Type
N/A