Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Bound fragmented header copies by the remaining length siw_get_hdr() can receive an extended DDP/RDMAP header across more than one TCP callback. The first callback may receive most of the header, while the next one still limits the copy to hdrlen - MIN_DDP_HDR instead of the number of missing bytes. This makes the destination move past the end of the header and overwrite the receive state, including fpdu_part_rcvd. A later callback can then use a negative fpdu_part_rcvd value as a copy offset, which creates an OOB write. Use the number of header bytes already received when calculating the next copy length.

Quick Facts

References

• https://git.kernel.org/stable/c/262dcd809723723ed8a4e05437ec…
• https://git.kernel.org/stable/c/2c6fbcf4bfac0b2b186acc8d9115…
• https://git.kernel.org/stable/c/8628f8ebf41669302513fb3f0bf0…
• https://git.kernel.org/stable/c/9ff797e516dbc1ecb73701ec4c24…
• https://git.kernel.org/stable/c/af9f5b474a260ad23ffb9793d716…
• https://git.kernel.org/stable/c/b72dcfb9bf1f0f0147cda03dc59e…
• https://git.kernel.org/stable/c/e6bdfdf3bcb02d0d626a45e8c98b…
• https://git.kernel.org/stable/c/eb4d7a946970469b3ab0c762432b…

External Resources