Description
In the Linux kernel, the following vulnerability has been resolved: cipso: adjust cached option offsets when removing CIPSO cipso_v4_skbuff_delattr() removes the CIPSO bytes but does not adjust cached offsets for options that follow them. For example, with a valid 10-byte CIPSO option followed by a seven-byte RR option, parsing records rr at offset 30. Removing CIPSO moves RR to offset 20, while the cached offset remains 30. Consumers such as ip_forward_options() and __ip_options_echo() then access the wrong bytes; the latter may interpret packet data as the option length and copy it into fixed-size option storage. Mirror cipso_v4_delopt() and subtract cipso_len from the srr, rr, ts and router_alert offsets when they follow CIPSO. cipso_len is the distance the first memmove() shifts those options. The later header move and network-header reset relocate the bytes and their offset base together.
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
89aa3619d141d6cfb6040a561aebb6d99d3e2285 to < b965977126a90e01825814c859ba4788691eddd3affected89aa3619d141d6cfb6040a561aebb6d99d3e2285 to < 2200fe1d6148b78e1b8f00f4b2bd47760015077faffected89aa3619d141d6cfb6040a561aebb6d99d3e2285 to < 6e49d611a9cfbaac927b8fa80ebd4f6b1f37ada0affected89aa3619d141d6cfb6040a561aebb6d99d3e2285 to < 6d25ffca055a77787c21a36b66c253f76239411baffected
Linux Linux
Default version status: affected
6.10affected0 to < 6.10unaffected6.12.113 to ≤ 6.12.*unaffected6.18.57 to ≤ 6.18.*unaffected7.2.11 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected