Description
In the Linux kernel, the following vulnerability has been resolved: libceph: refresh auth->authorizer_buf{,_len} after authorizer update ceph_x_create_authorizer() caches au->buf->vec.iov_base and au->buf->vec.iov_len in struct ceph_auth_handshake. These cached values are then used by the messenger connect code when sending the authorizer. ceph_x_update_authorizer() can rebuild the authorizer when a newer service ticket is available. If the rebuilt authorizer no longer fits in the existing buffer, ceph_x_build_authorizer() drops its reference to au->buf and allocates a new one. If this is the final reference, ceph_buffer_put() frees the old ceph_buffer and its vec.iov_base, but auth->authorizer_buf still points at that freed memory. A subsequent msgr1 reconnect can therefore queue the stale pointer and trigger a KASAN slab-use-after-free in _copy_from_iter() while tcp_sendmsg() copies the authorizer. Refresh auth->authorizer_buf and auth->authorizer_buf_len after a successful authorizer rebuild so the messenger sends the current buffer.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
0bed9b5c523d577378b6f83eab5835fe30c27208 to < 2334e9997308305ee4fd508fdfe6086c4150ed60affected0bed9b5c523d577378b6f83eab5835fe30c27208 to < 79a273df64238a4ade8b709689a78589f755b8efaffected0bed9b5c523d577378b6f83eab5835fe30c27208 to < 26f814187abceee90dbb29a02133adb4786fbb13affected0bed9b5c523d577378b6f83eab5835fe30c27208 to < 9d37aec9ffe4e743dabc3f84502e9723e17a30d4affected0bed9b5c523d577378b6f83eab5835fe30c27208 to < 75e82e8944ac1efe9fdb88bd2f14d9a031282bdfaffected0bed9b5c523d577378b6f83eab5835fe30c27208 to < 0060ec912292a550198d8d18ac95b433c92a7091affected0bed9b5c523d577378b6f83eab5835fe30c27208 to < 5ecfcd5c05866f185357700b81b461dae4f5ebb2affected0bed9b5c523d577378b6f83eab5835fe30c27208 to < 937d61f86d377a3aa578adae7a3dfcecdddf9d89affected29c65a277a64645af853e8c9a9b3dda0ddc421e0affectedd2c7223497cf8228416c70e3f4238ddd6c5bdf3caffected3.4.50 to < 3.5affected3.9.7 to < 3.10affected
Linux Linux
Default version status: affected
3.10affected0 to < 3.10unaffected5.10.265 to ≤ 5.10.*unaffected5.15.216 to ≤ 5.15.*unaffected6.1.183 to ≤ 6.1.*unaffected6.6.148 to ≤ 6.6.*unaffected6.12.101 to ≤ 6.12.*unaffected6.18.42 to ≤ 6.18.*unaffected7.1.6 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/2334e9997308305ee4fd508fdfe6086c4150ed60 ↗
- https://git.kernel.org/stable/c/79a273df64238a4ade8b709689a78589f755b8ef ↗
- https://git.kernel.org/stable/c/26f814187abceee90dbb29a02133adb4786fbb13 ↗
- https://git.kernel.org/stable/c/9d37aec9ffe4e743dabc3f84502e9723e17a30d4 ↗
- https://git.kernel.org/stable/c/75e82e8944ac1efe9fdb88bd2f14d9a031282bdf ↗
- https://git.kernel.org/stable/c/0060ec912292a550198d8d18ac95b433c92a7091 ↗
- https://git.kernel.org/stable/c/5ecfcd5c05866f185357700b81b461dae4f5ebb2 ↗
- https://git.kernel.org/stable/c/937d61f86d377a3aa578adae7a3dfcecdddf9d89 ↗