Re: [PATCH 2/2] Revert "dccp: don't free ccid2_hc_tx_sock struct in dccp_disconnect()"

Kleber Souza
2020-10-15T09:24:03Z

On 15.10.20 05:42, Jakub Kicinski wrote:
> On Tue, 13 Oct 2020 19:18:49 +0200 Kleber Sacilotto de Souza wrote:
>> From: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
>>
>> This reverts commit 2677d20677314101293e6da0094ede7b5526d2b1.
>>
>> This fixes an issue that after disconnect, dccps_hc_tx_ccid will still be
>> kept, allowing the socket to be reused as a listener socket, and the cloned
>> socket will free its dccps_hc_tx_ccid, leading to a later use after free,
>> when the listener socket is closed.
>>
>> This addresses CVE-2020-16119.
>>
>> Fixes: 2677d2067731 (dccp: don't free ccid2_hc_tx_sock struct in dccp_disconnect())
>> Reported-by: Hadar Manor
>
> Does this person has an email address?

We have received this report via a private Launchpad bug and the submitter
didn't provide any public email address, so we have only their name.

>
>> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
>> Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>