Your message dated Thu, 17 Oct 2013 13:33:42 +0200
with message-id <525fcb16.50...@debian.org>
and subject line Re: Bug#724545: vino: CVE-2013-5745 denial of service via
infinite loop
has caused the Debian Bug report #724545,
regarding vino: CVE-2013-5745 denial of service via infinite loop
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
724545: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=724545
Debian Bug Tracking System
Contact ow...@bugs.debian.org with problems
--- Begin Message ---
Package: vino
Severity: grave
Tags: security
Hi,
the following vulnerability was published for vino.
CVE-2013-5745[0]:
| Persistent DoS Vulnerability in Vino VNC Server
|
| This vulnerability is triggered when the user is required to enter a password.
| The server closes the client connection on receiving an unexpected input
| sequence from the client.
|
| The unprocessed client data remains in the buffer; the server does not remove
| them from buffer since the client connection has been closed.
| The result is an infinite loop at the do-while (more_data_pending
| (rfb_client->sock)) in vino-server.c:415
| The gdm and vino-server processes together take up 100% CPU, causing denial of
| service (see screenshot).
| In our tests, the DOS is triggered when the same input sequence is replayed
| twice (see pcap).
|
| vino-server.c:415 (vino 2.26.1):
| 407:vino_server_client_data_pending (GIOChannel *source,
| 408: GIOCondition condition,
| 409: rfbClientPtr rfb_client)
| 410:{
| 411: if (rfb_client->onHold)
| 412: return TRUE;
| 414: do {
| 415: rfbProcessClientMessage (rfb_client);
| 416: } while (more_data_pending (rfb_client->sock));
|
| The original 2.26.1 binary, pcap and screenshot are attached with this email.
If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.
For further information see:
[0] http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-5745
http://security-tracker.debian.org/tracker/CVE-2013-5745
https://bugzilla.gnome.org/show_bug.cgi?id=641811
Please adjust the affected versions in the BTS as needed.
--
Nico Golde - XMPP: n...@jabber.ccc.de - GPG: 0xA0A0AAAA
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--- End Message ---
--- Begin Message ---
Version: 3.10.1-1
Fixed in 3.10.1-1 which has been uploaded to unstable. Unfortunately not
mentioned in the changelog.
If this should be fixed for stable as well (via stable or
stable-security), please let us know.
Michael
--
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?
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