Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: netfilter: ipset: do not update comments from kernel-side hash adds mtype_resize() copies comment pointers with memcpy(), not the comment objects themselves. During the window after an entry has been copied but before the table swap and backlog replay, the old table is still published for packet-side updates while the replacement-table entry already holds the same ip_set_comment_rcu pointer. If xt_SET --add-set ... --exist hits that old entry in this window, mtype_add() calls ip_set_init_comment() even though packet-side adds carry no comment payload. That call frees the shared comment through the old entry, so the replacement-table entry now holds a stale pointer. When the queued add is replayed on the new table, mtype_add() calls ip_set_init_comment() again and strlen() dereferences the stale pointer. Fix this in mtype_add() by skipping ip_set_init_comment() when ext->target marks a packet-side add. Userspace adds still update comments, while packet-side adds can no longer free comment storage shared with a resize copy.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f66ee0410b1c3481ee75e5db9b34547b4d582465 before 6f13f4d52d06986c18f12e8bffaab944dd27ceab; affected f66ee0410b1c3481ee75e5db9b34547b4d582465 before f9d6cabff1fca010562dcdb0d22b296bdca3ba5a; affected f66ee0410b1c3481ee75e5db9b34547b4d582465 before 16bfa7be2d76ca1e0aacfa363482e1bf8ab5042a; affected f66ee0410b1c3481ee75e5db9b34547b4d582465 before 661ff9c0cfbe07f8eed920dde9f7781491738207; affected f66ee0410b1c3481ee75e5db9b34547b4d582465 before c710e9bf38e4e71a8db85d26a0f70c0674664207; affected f66ee0410b1c3481ee75e5db9b34547b4d582465 before 4ae701848e4ba9e9713375fb7d82218cbd309da2; affected f66ee0410b1c3481ee75e5db9b34547b4d582465 before 77dbb248a5cc7a5270cd37bbb0b635bf059a872a; affected f66ee0410b1c3481ee75e5db9b34547b4d582465 before f30415929be8aeb002d557c8d3f7ab2d2188003a; affected 5dd9488ae41070b69d2f4acb580f77db5705f9ca; affected a469bab3386aebff33c59506f3a95e35b91118fd; affected 5.4.24 before 5.5; affected 5.5.8 before 5.6 |
| Linux / Linux | affected 5.6; unaffected 0 before 5.6; unaffected 5.10.265 through 5.10.*; unaffected 5.15.216 through 5.15.*; unaffected 6.1.183 through 6.1.*; unaffected 6.6.151 through 6.6.*; unaffected 6.12.103 through 6.12.*; unaffected 6.18.44 through 6.18.*; unaffected 7.1.8 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6f13f4d52d06986c18f12e8bffaab944dd27ceab
- https://git.kernel.org/stable/c/f9d6cabff1fca010562dcdb0d22b296bdca3ba5a
- https://git.kernel.org/stable/c/16bfa7be2d76ca1e0aacfa363482e1bf8ab5042a
- https://git.kernel.org/stable/c/661ff9c0cfbe07f8eed920dde9f7781491738207
- https://git.kernel.org/stable/c/c710e9bf38e4e71a8db85d26a0f70c0674664207
- https://git.kernel.org/stable/c/4ae701848e4ba9e9713375fb7d82218cbd309da2
- https://git.kernel.org/stable/c/77dbb248a5cc7a5270cd37bbb0b635bf059a872a
- https://git.kernel.org/stable/c/f30415929be8aeb002d557c8d3f7ab2d2188003a
ADP enrichment
No English description supplied.
No references supplied.