Bug 577711 (CVE-2010-1188) - CVE-2010-1188 kernel: ipv6: skb is unexpectedly freed
Summary: CVE-2010-1188 kernel: ipv6: skb is unexpectedly freed
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2010-1188
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 546402 577712 577713 577715 577716 577717 577718
Blocks:
TreeView+ depends on / blocked
 
Reported: 2010-03-29 03:29 UTC by Eugene Teo (Security Response)
Modified: 2021-11-12 20:05 UTC (History)
8 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-10-19 09:10:48 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2010:0380 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2010-04-27 12:46:01 UTC
Red Hat Product Errata RHSA-2010:0394 0 normal SHIPPED_LIVE Important: kernel security, bug fix, and enhancement update 2010-05-05 13:05:05 UTC
Red Hat Product Errata RHSA-2010:0424 0 normal SHIPPED_LIVE Important: kernel security and enhancement update 2010-05-18 22:06:16 UTC
Red Hat Product Errata RHSA-2010:0439 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2010-05-25 15:30:00 UTC
Red Hat Product Errata RHSA-2010:0882 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2010-11-12 09:36:39 UTC

Description Eugene Teo (Security Response) 2010-03-29 03:29:49 UTC 
Description of problem:
The server side sets IPV6_RECVPKTINFO on a listening socket, and the client side just sends a message to the server.  Then the kernel panic occurs on the server.
    
This problem happens because a skb is forcibly freed in tcp_rcv_state_process().
    
When a socket in listening state(TCP_LISTEN) receives a syn packet, then tcp_v6_conn_request() will be called from tcp_rcv_state_process().  If the tcp_v6_conn_request() successfully returns, the skb would be discarded by __kfree_skb().
    
However, in case of a listening socket which was already set IPV6_RECVPKTINFO, an address of the skb will be stored in treq->pktopts and a ref count of the skb will be incremented in tcp_v6_conn_request().  But, even if the skb is still in use, the skb will be freed.  Then someone still using the freed skb will cause the kernel panic.

Upstream commit:
http://git.kernel.org/linus/fb7e2399ec17f1004c0e0ccfd17439f8759ede01
Comment 3 Kirk Larsen 2010-04-09 00:37:29 UTC 
Hi,

Does this affect RHEL 5?

Thanks!
Comment 4 Guil Barros 2010-04-13 13:52:24 UTC 
Does disabling ipv6 mitigate this vulnerability?
Comment 5 Eugene Teo (Security Response) 2010-04-14 01:39:58 UTC 
(In reply to comment #3)
> Hi,
> 
> Does this affect RHEL 5?

Hi Kirk,

We have released an update for Red Hat Enterprise Linux 5. https://rhn.redhat.com/errata/RHSA-2010-0178.html.

Thanks, Eugene
Comment 6 Eugene Teo (Security Response) 2010-04-14 01:40:26 UTC 
(In reply to comment #4)
> Does disabling ipv6 mitigate this vulnerability?    

Yes.
Comment 7 errata-xmlrpc 2010-04-27 12:46:07 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5.4.Z - Server Only

Via RHSA-2010:0380 https://rhn.redhat.com/errata/RHSA-2010-0380.html
Comment 8 errata-xmlrpc 2010-05-05 13:05:16 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 4

Via RHSA-2010:0394 https://rhn.redhat.com/errata/RHSA-2010-0394.html
Comment 9 errata-xmlrpc 2010-05-18 22:06:19 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 4.7 Z Stream

Via RHSA-2010:0424 https://rhn.redhat.com/errata/RHSA-2010-0424.html
Comment 10 errata-xmlrpc 2010-05-25 15:30:03 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 5.3.Z - Server Only

Via RHSA-2010:0439 https://rhn.redhat.com/errata/RHSA-2010-0439.html
Comment 12 errata-xmlrpc 2010-11-12 09:37:21 UTC 
This issue has been addressed in following products:

  Red Hat Enterprise Linux 3 Extended Lifecycle Support

Via RHSA-2010:0882 https://rhn.redhat.com/errata/RHSA-2010-0882.html
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