INFORMATION BULLETIN

S-240: Asterisk

[Debian Security Advisory DSA-1525-1]

March 27, 2008 19:00 GMT


PROBLEM:	Several remote vulnerabilities have been discovered in Asterisk, a free software PBX and telephony toolkit.
PLATFORM:	Debian GNU/Linux 4.0 (stable)
DAMAGE:	Authentication bypass and the potential external initiation of calls.
SOLUTION:	Upgrade to the appropriate version.

VULNERABILITY ASSESSMENT:	The risk is LOW. Insufficient validation of From: headers inside the SIP channel driver may lead to authentication bypass and the potential external initiation of calls.

CVSS 2 BASE SCORE: TEMPORAL SCORE: VECTOR:	6.4 5.3 (AV:N/AC:L/Au:N/C:N/I:P/A:P/E:F/RL:OF/RC:C)

LINKS:
CIAC BULLETIN:	http://www.ciac.org/ciac/bulletins/s-240.shtml
ORIGINAL BULLETIN:	http://www.debian.org/security/2008/dsa-1525
CVE:	CVE-2007-6430 CVE-2008-1332 CVE-2008-1333

[***** Start Debian Security Advisory DSA-1525-1 *****]

Debian Security Advisory

DSA-1525-1 asterisk -- several vulnerabilities

Date Reported:

20 Mar 2008

Affected Packages:

asterisk

Vulnerable:

Yes

Security database references:

In Mitre's CVE dictionary: CVE-2007-6430, CVE-2008-1332, CVE-2008-1333.

More information:

Several remote vulnerabilities have been discovered in Asterisk, a free software PBX and telephony toolkit. The Common Vulnerabilities and Exposures project identifies the following problems:

CVE-2007-6430
Tilghman Lesher discovered that database-based registrations are insufficiently validated. This only affects setups, which are configured to run without a password and only host-based authentication.
CVE-2008-1332
Jason Parker discovered that insufficient validation of From: headers inside the SIP channel driver may lead to authentication bypass and the potential external initiation of calls.
CVE-2008-1333
This update also fixes a format string vulnerability, which can only be triggered through configuration files under control of the local administrator. In later releases of Asterisk this issue is remotely exploitable and tracked as CVE-2008-1333.

The status of the old stable distribution (sarge) is currently being investigated. If affected, an update will be released through security.debian.org.

For the stable distribution (etch), these problems have been fixed in version 1:1.2.13~dfsg-2etch3.

We recommend that you upgrade your asterisk packages.

Fixed in:

Debian GNU/Linux 4.0 (stable)

Source:: http://security.debian.org/pool/updates/main/a/asterisk/asterisk_1.2.13~dfsg-2etch3.diff.gz; http://security.debian.org/pool/updates/main/a/asterisk/asterisk_1.2.13~dfsg.orig.tar.gz; http://security.debian.org/pool/updates/main/a/asterisk/asterisk_1.2.13~dfsg-2etch3.dsc
Architecture-independent component:: http://security.debian.org/pool/updates/main/a/asterisk/asterisk-doc_1.2.13~dfsg-2etch3_all.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-sounds-main_1.2.13~dfsg-2etch3_all.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-config_1.2.13~dfsg-2etch3_all.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-web-vmail_1.2.13~dfsg-2etch3_all.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-dev_1.2.13~dfsg-2etch3_all.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk_1.2.13~dfsg-2etch3_all.deb
Alpha:: http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch3_alpha.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch3_alpha.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch3_alpha.deb
AMD64:: http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch3_amd64.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch3_amd64.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch3_amd64.deb
ARM:: http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch3_arm.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch3_arm.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch3_arm.deb
HP Precision:: http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch3_hppa.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch3_hppa.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch3_hppa.deb
Intel IA-32:: http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch3_i386.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch3_i386.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch3_i386.deb
Intel IA-64:: http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch3_ia64.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch3_ia64.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch3_ia64.deb
Big-endian MIPS:: http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch3_mips.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch3_mips.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch3_mips.deb
Little-endian MIPS:: http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch3_mipsel.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch3_mipsel.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch3_mipsel.deb
PowerPC:: http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch3_powerpc.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch3_powerpc.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch3_powerpc.deb
IBM S/390:: http://security.debian.org/pool/updates/main/a/asterisk/asterisk-classic_1.2.13~dfsg-2etch3_s390.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-bristuff_1.2.13~dfsg-2etch3_s390.deb; http://security.debian.org/pool/updates/main/a/asterisk/asterisk-h323_1.2.13~dfsg-2etch3_s390.deb

MD5 checksums of the listed files are available in the original advisory.


[***** End Debian Security Advisory DSA-1525-1 *****]

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