Crypt::SysRandom::XS versions before 0.010 for Perl is vulnerable to a heap buffer overflow in the XS function random_bytes()

Crypt::SysRandom::XS versions before 0.010 for Perl is vulnerable to a heap buffer overflow in the XS function random_bytes(). The function does not validate that the length parameter is non-negative. If a negative value (e.g. -1) is supplied, the expression length + 1u causes an integer wraparound, resulting in a zero-byte allocation. The subsequent call to chosen random function (e.g. getrandom) passes the original negative value, which is implicitly converted to a large unsigned value (typically SIZE_MAX). This can result in writes beyond the allocated buffer, leading to heap memory corruption and application crash (denial of service). In common usage, the length argument is typically hardcoded by the caller, which reduces the likelihood of attacker-controlled exploitation. Applications that pass untrusted input to this parameter may be affected.

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堆缓冲区溢出

Crypt::SysRandom::XS 安全漏洞

Crypt::SysRandom::XS是LEONT个人开发者的一个获取加密随机数的Perl库。 Crypt::SysRandom::XS 0.010之前版本存在安全漏洞，该漏洞源于XS函数random_bytes未验证长度参数为非负值，可能导致堆缓冲区溢出和应用程序崩溃。

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