Regression on [DSA 2276-1]?

[Jan Joris Vereijken <janjoris@acm.org>]

Hi Luciano,

I applied DSA 2276-1 to my Lenny/i386 system, and asterisk suddenly wouldn't start anymore. Reboot did not help. This is a production Asterisk system where "nothing" is ever changed, other than the Asterisk config (which also hasn't changed for six months). I never had any issues with any updates since the system went live just after Lenny became stable.

I examined /var/log/messages, and nothing shows on asterisk that didn't show before. Asterisk seems to start, but it doesn't show in the process list afterward. 

Could this be a regression? 

As this is a production system, I did not examine the problem for more than 5 minutes (two reboots, a couple attempts at /etc/init.d/asterisk restart, looking at /var/log/messages), and then rolled back the last full disk backup. 

If you want me to do any tests this will be difficult during the work week (this is a critical production system), but I probably can shedule them over the next weekend.

Thanks,

- Jan Joris -

On Sun, Jul 10, 2011 at 17:17, Luciano Bello <luciano@debian.org> wrote:

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- -------------------------------------------------------------------------
Debian Security Advisory DSA-2276-1                   security@debian.org
http://www.debian.org/security/                             Luciano Bello
July 10, 2011                          http://www.debian.org/security/faq
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Package        : asterisk
Vulnerability  : multiple denial of service
Problem type   : remote
Debian-specific: no
CVE ID         : CVE-2011-2529 CVE-2011-2535
Debian Bug     : 631445 631446 631448

Paul Belanger reported a vulnerability in Asterisk identified as AST-2011-008
(CVE-2011-2529) through which an unauthenticated attacker may crash an Asterisk
server remotely. A package containing a null char causes the SIP header parser
to alter unrelated memory structures.

Jared Mauch reported a vulnerability in Asterisk identified as AST-2011-009
through which an unauthenticated attacker may crash an Asterisk server remotely.
If a user sends a package with a Contact header with a missing left angle
bracket (<) the server will crash. A possible workaround is to disable chan_sip.

The vulnerability identified as AST-2011-010 (CVE-2011-2535) reported about an
input validation error in the IAX2 channel driver. An unauthenticated attacker
may crash an Asterisk server remotely by sending a crafted option control frame.


For the oldstable distribution (lenny), this problem has been fixed in
version 1.4.21.2~dfsg-3+lenny3.

For the stable distribution (squeeze), this problem has been fixed in
version 1.6.2.9-2+squeeze3.

For the testing distribution (wheezy), this problem has been fixed in
version 1:1.8.4.3-1.

For the unstable distribution (sid), this problem has been fixed in
version 1:1.8.4.3-1.

We recommend that you upgrade your asterisk packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: http://www.debian.org/security/

Mailing list: debian-security-announce@lists.debian.org

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-- 
Jan Joris Vereijken / janjoris@acm.org / +31 6 2128 0372