Description
In the Linux kernel, the following vulnerability has been resolved: sctp: validate cached peer INIT chunk length in COOKIE_ECHO processing When a listening SCTP server processes a COOKIE_ECHO chunk, the cached peer INIT chunk embedded after the cookie is parsed and its parameters are later walked by sctp_process_init() using sctp_walk_params(). However, the chunk header length of this cached INIT chunk was not validated against the remaining buffer in the COOKIE_ECHO payload. If the length field is inflated, the parameter walk can run beyond the actual received data, leading to out-of-bounds reads and potential memory corruption during later parameter handling (e.g. STATE_COOKIE processing and kmemdup() copies). Add a bounds check in sctp_unpack_cookie() to ensure the cached INIT chunk length does not exceed the available data in the COOKIE_ECHO buffer before it is used.
CVSS breakdown
Affected products
- Linux / Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – cc272185c9a9a4b7febc2de52eeaa3d00f19091e
- Linux / Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – edccbf3d63b0a3362bc916ea72edacc1e1ca456a
- Linux / Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – 0861615c28de668669d748ef4eb913ea9262d13b
- Linux / Linux2.6.12 – 2.6.12
- Linux / Linux0 – 2.6.12
- Linux / Linux6.18.36 – 6.18.*
- Linux / Linux7.0.13 – 7.0.*
- Linux / Linux7.1 – *