[asterisk-bugs] [JIRA] (ASTERISK-29519) ROC value not incremented in SRTP
Asterisk Team (JIRA)
noreply at issues.asterisk.org
Tue Jul 27 12:00:33 CDT 2021
[ https://issues.asterisk.org/jira/browse/ASTERISK-29519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=255704#comment-255704 ]
Asterisk Team commented on ASTERISK-29519:
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> ROC value not incremented in SRTP
> ---------------------------------
>
> Key: ASTERISK-29519
> URL: https://issues.asterisk.org/jira/browse/ASTERISK-29519
> Project: Asterisk
> Issue Type: Bug
> Security Level: None
> Components: Resources/res_srtp
> Affects Versions: 18.4.0
> Reporter: Marcos Cereijo RodrÃguez
> Assignee: Marcos Cereijo RodrÃguez
>
> h3. What is happening?
> We have to do an integration with a client that wants to secure their communications with TLS for the signaling and SRTP for the media.
> After enabling SRTP all looked great, but the client detected that after ~22 minutes the call hangup automatically.
> After some debugging, the client inform us that his SBC provider detected the issue. The reason of this problem was that after the RTP sequence number overflowed, the ROC (roll-over counter) value wasn't increased.
> h3. Proposed solution
> We had to update the `libsrtp` version from 2.0.0 to 2.3.0. The reason for this change is that the default version included in Debian doesn't expose the headers from reading and changing the values of ROC.
> For implementing this, we modified the following files:
> * res/res_rtp_asterisk.c
> * res/res_srtp.c
> The modifications for *res_srtp.c*:
> <inline code removed>
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