CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's SCTP (Stream Control Transmission Protocol) implementation, where improper validation of cookie authentication states can lead to out-of-bounds reads and potential privilege escalation. Attackers can exploit this flaw by crafting malicious cookie parameters, allowing them to manipulate memory and escalate privileges locally. Organizations using Linux systems, particularly those relying on SCTP for network communications, should prioritize addressing this vulnerability to mitigate risks associated with unauthorized access and system compromise.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: sctp: validate cookie AUTH state before use When cookie authentication is disabled, COOKIE_ECHO restores fixed-size AUTH fields directly from peer-controlled cookie bytes. A forged RANDOM length, HMAC list, or CHUNKS list can then reach association consumers with lengths or identifiers that were never validated against the local backing arrays. A forged RANDOM length can cause out-of-bounds reads during key-vector construction. A forged HMAC identifier also caused a 32-byte write past a zero-length AUTH chunk, providing a primitive for a local privilege escalation chain. Validate the cookie's RANDOM, HMACS, and CHUNKS parameters at the cookie trust boundary before copying them into the association. Reject invalid types, malformed lengths, unsupported HMAC identifiers, HMAC lists without SHA1, and forbidden chunk ids.