| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2022-48711: tipc: improve size validations for received domain records |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| tipc: improve size validations for received domain records |
| |
| The function tipc_mon_rcv() allows a node to receive and process |
| domain_record structs from peer nodes to track their views of the |
| network topology. |
| |
| This patch verifies that the number of members in a received domain |
| record does not exceed the limit defined by MAX_MON_DOMAIN, something |
| that may otherwise lead to a stack overflow. |
| |
| tipc_mon_rcv() is called from the function tipc_link_proto_rcv(), where |
| we are reading a 32 bit message data length field into a uint16. To |
| avert any risk of bit overflow, we add an extra sanity check for this in |
| that function. We cannot see that happen with the current code, but |
| future designers being unaware of this risk, may introduce it by |
| allowing delivery of very large (> 64k) sk buffers from the bearer |
| layer. This potential problem was identified by Eric Dumazet. |
| |
| This fixes CVE-2022-0435 |
| |
| The Linux kernel CVE team has assigned CVE-2022-48711 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.8 with commit 35c55c9877f8de0ab129fa1a309271d0ecc868b9 and fixed in 4.9.301 with commit 175db196e45d6f0e6047eccd09c8ba55465eb131 |
| Issue introduced in 4.8 with commit 35c55c9877f8de0ab129fa1a309271d0ecc868b9 and fixed in 4.14.266 with commit fde4ddeadd099bf9fbb9ccbee8e1b5c20d530a2d |
| Issue introduced in 4.8 with commit 35c55c9877f8de0ab129fa1a309271d0ecc868b9 and fixed in 4.19.229 with commit f1af11edd08dd8376f7a84487cbb0ea8203e3a1d |
| Issue introduced in 4.8 with commit 35c55c9877f8de0ab129fa1a309271d0ecc868b9 and fixed in 5.4.179 with commit d692e3406e052dbf9f6d9da0cba36cb763272529 |
| Issue introduced in 4.8 with commit 35c55c9877f8de0ab129fa1a309271d0ecc868b9 and fixed in 5.10.100 with commit 3c7e5943553594f68bbc070683db6bb6f6e9e78e |
| Issue introduced in 4.8 with commit 35c55c9877f8de0ab129fa1a309271d0ecc868b9 and fixed in 5.15.23 with commit 1f1788616157b0222b0c2153828b475d95e374a7 |
| Issue introduced in 4.8 with commit 35c55c9877f8de0ab129fa1a309271d0ecc868b9 and fixed in 5.16.9 with commit 59ff7514f8c56f166aadca49bcecfa028e0ad50f |
| Issue introduced in 4.8 with commit 35c55c9877f8de0ab129fa1a309271d0ecc868b9 and fixed in 5.17 with commit 9aa422ad326634b76309e8ff342c246800621216 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2022-48711 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/tipc/link.c |
| net/tipc/monitor.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/175db196e45d6f0e6047eccd09c8ba55465eb131 |
| https://git.kernel.org/stable/c/fde4ddeadd099bf9fbb9ccbee8e1b5c20d530a2d |
| https://git.kernel.org/stable/c/f1af11edd08dd8376f7a84487cbb0ea8203e3a1d |
| https://git.kernel.org/stable/c/d692e3406e052dbf9f6d9da0cba36cb763272529 |
| https://git.kernel.org/stable/c/3c7e5943553594f68bbc070683db6bb6f6e9e78e |
| https://git.kernel.org/stable/c/1f1788616157b0222b0c2153828b475d95e374a7 |
| https://git.kernel.org/stable/c/59ff7514f8c56f166aadca49bcecfa028e0ad50f |
| https://git.kernel.org/stable/c/9aa422ad326634b76309e8ff342c246800621216 |
