Heap Memory Leak in libslirp TCP Urgent Data Handling

Executive Summary

This vulnerability is an out-of-bounds heap read and integer underflow in the TCP urgent data handling (sosendoob) component of freedesktop.org libslirp versions before v4.9.2. It occurs in hypervisor host environments such as QEMU. A privileged guest virtual machine attacker with root or CAP_NET_RAW privileges can exploit this by sending specially crafted TCP segments with manipulated URG flags and urgent pointers, which causes the host to leak gigabytes of sensitive heap memory from host processes.

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Impact Analysis

The vulnerability allows a privileged guest VM attacker to leak large amounts of sensitive memory from the host system. This memory leakage can expose confidential data processed by host applications, potentially leading to information disclosure and compromising the security of the host environment.

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Compliance Impact

This vulnerability allows a privileged guest VM attacker to leak gigabytes of sensitive host-process heap memory. Such unauthorized disclosure of sensitive data could potentially impact compliance with data protection regulations like GDPR and HIPAA, which require safeguarding sensitive information against unauthorized access or leaks.

However, specific impacts on compliance depend on the nature of the leaked data and the environment in which libslirp is used. The CVE description does not provide explicit details on compliance implications.

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