CyberRota Analysis
AI-GeneratedThe vulnerability affects the SCTP (Stream Control Transmission Protocol) implementation in the Linux kernel, specifically in the handling of the auth_hmacs array within the sctp_cookie structure. An incorrect array size calculation can lead to buffer overflows, potentially allowing an attacker to exploit invalid HMAC identifiers, resulting in out-of-bounds reads and compromising system integrity. Organizations using Linux systems with SCTP should prioritize this fix to mitigate risks associated with this memory corruption issue.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: sctp: fix auth_hmacs array size in struct sctp_cookie The auth_hmacs array in struct sctp_cookie is supposed to store a complete SCTP_AUTH_HMAC_ALGO parameter, which consists of a struct sctp_paramhdr followed by N HMAC identifiers. However, the array size was calculated using an extra 2 bytes instead of sizeof(struct sctp_paramhdr), which is 4 bytes. When four HMAC identifiers are configured, the HMAC-ALGO parameter stored in the endpoint is larger than the auth_hmacs buffer in the cookie. As a result, sctp_association_init() copies beyond the end of auth_hmacs when initializing the association, corrupting the adjacent auth_chunks field. This can lead to an invalid HMAC identifier being accepted and later cause an out-of-bounds read in sctp_auth_get_hmac(). Fix the array size calculation by including the full SCTP parameter header size.