Detalji

U programskom paketu Asterisk, distribuiranom s operacijskim sustavom Fedora 15, uočeni su novi sigurnosni propusti. Asterisk je program koji omogućuje uspostavu PBX centrale. Sigurnosni propusti vezani su uz mogućnost pretjeranog iskorištavanja resursa (eng. resource exhaustion) u Asterisk Manager sučelju te dereferenciranja NULL pokazivača prilikom obrade određenih TCP veza. Udaljenom napadaču omogućuju izvođenje napada uskraćivanjem usluga (eng. Denial of Service). Svim korisnicima navedenog programskog paketa preporuča se nadogradnja. 

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Fedora Update Notification
FEDORA-2011-3958
2011-03-24 06:50:24
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Name        : asterisk
Product     : Fedora 15
Version     : 1.8.3.2
Release     : 1.fc15
URL         : http://www.asterisk.org/
Summary     : The Open Source PBX
Description :
Asterisk is a complete PBX in software. It runs on Linux and provides
all of the features you would expect from a PBX and more. Asterisk
does voice over IP in three protocols, and can interoperate with
almost all standards-based telephony equipment using relatively
inexpensive hardware.

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Update Information:

The Asterisk Development Team has announced security releases for Asterisk
branches 1.6.1, 1.6.2, and 1.8. The available security releases are
released as versions 1.6.1.24, 1.6.2.17.2, and 1.8.3.2.
These releases are available for immediate download at
http://downloads.asterisk.org/pub/telephony/asterisk/releases
** This is a re-release of Asterisk 1.6.1.23, 1.6.2.17.1 and 1.8.3.1 which
contained a bug which caused duplicate manager entries (issue #18987).
The releases of Asterisk 1.6.1.24, 1.6.2.17.2, and 1.8.3.2 resolve two issues:
* Resource exhaustion in Asterisk Manager Interface (AST-2011-003)
* Remote crash vulnerability in TCP/TLS server (AST-2011-004)
The issues and resolutions are described in the AST-2011-003 and AST-2011-004
security advisories.
For more information about the details of these vulnerabilities, please read
the
security advisories AST-2011-003 and AST-2011-004, which were released at the
same time as this announcement.
For a full list of changes in the current releases, please see the ChangeLog:
http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-1.6.1.24
http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-1.6.2.17.2
http://downloads.asterisk.org/pub/telephony/asterisk/releases/ChangeLog-1.8.3.2
Security advisory AST-2011-003 and AST-2011-004 are available at:
http://downloads.asterisk.org/pub/security/AST-2011-003.pdf
http://downloads.asterisk.org/pub/security/AST-2011-004.pdf
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References:

  [ 1 ] Bug #688675 - CVE-2011-1174 asterisk: resource exhaustion in Asterisk
Manager Interface (AST-2011-003)
        https://bugzilla.redhat.com/show_bug.cgi?id=688675
  [ 2 ] Bug #688678 - CVE-2011-1175 asterisk: DoS in TCP/TLS server due to NULL
ptr deref (AST-2011-004)
        https://bugzilla.redhat.com/show_bug.cgi?id=688678
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This update can be installed with the "yum" update program.  Use 
su -c 'yum update asterisk' at the command line.
For more information, refer to "Managing Software with yum",
available at http://docs.fedoraproject.org/yum/.

All packages are signed with the Fedora Project GPG key.  More details on the
GPG keys used by the Fedora Project can be found at
https://fedoraproject.org/keys
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