5 Medium
CVSS2
Access Vector
Access Complexity
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.387 Low
EPSS
Percentile
97.3%
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-2011-009through 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.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from Debian Security Advisory DSA-2276. The text
# itself is copyright (C) Software in the Public Interest, Inc.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(55554);
script_version("1.14");
script_set_attribute(attribute:"plugin_modification_date", value:"2021/01/04");
script_cve_id("CVE-2011-2529", "CVE-2011-2535");
script_bugtraq_id(48431);
script_xref(name:"DSA", value:"2276");
script_name(english:"Debian DSA-2276-1 : asterisk - multiple denial of service");
script_summary(english:"Checks dpkg output for the updated package");
script_set_attribute(
attribute:"synopsis",
value:"The remote Debian host is missing a security-related update."
);
script_set_attribute(
attribute:"description",
value:
"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-2011-009through 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."
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=631445"
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=631446"
);
script_set_attribute(
attribute:"see_also",
value:"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=631448"
);
script_set_attribute(
attribute:"see_also",
value:"http://downloads.asterisk.org/pub/security/AST-2011-008.html"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2011-2529"
);
script_set_attribute(
attribute:"see_also",
value:"http://downloads.asterisk.org/pub/security/AST-2011-009.html"
);
script_set_attribute(
attribute:"see_also",
value:"http://downloads.asterisk.org/pub/security/AST-2011-010.html"
);
script_set_attribute(
attribute:"see_also",
value:"https://security-tracker.debian.org/tracker/CVE-2011-2535"
);
script_set_attribute(
attribute:"see_also",
value:"https://packages.debian.org/source/squeeze/asterisk"
);
script_set_attribute(
attribute:"see_also",
value:"https://www.debian.org/security/2011/dsa-2276"
);
script_set_attribute(
attribute:"solution",
value:
"Upgrade the asterisk packages.
For the oldstable distribution (lenny), this problem has been fixed in
version 1.4.21.2~dfsg-3+lenny5.
For the stable distribution (squeeze), this problem has been fixed in
version 1.6.2.9-2+squeeze3."
);
script_set_cvss_base_vector("CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:debian:debian_linux:asterisk");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:5.0");
script_set_attribute(attribute:"cpe", value:"cpe:/o:debian:debian_linux:6.0");
script_set_attribute(attribute:"patch_publication_date", value:"2011/07/10");
script_set_attribute(attribute:"plugin_publication_date", value:"2011/07/12");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_copyright(english:"This script is Copyright (C) 2011-2021 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_family(english:"Debian Local Security Checks");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/Debian/release", "Host/Debian/dpkg-l");
exit(0);
}
include("audit.inc");
include("debian_package.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
if (!get_kb_item("Host/Debian/release")) audit(AUDIT_OS_NOT, "Debian");
if (!get_kb_item("Host/Debian/dpkg-l")) audit(AUDIT_PACKAGE_LIST_MISSING);
flag = 0;
if (deb_check(release:"5.0", prefix:"asterisk", reference:"1.4.21.2~dfsg-3+lenny5")) flag++;
if (deb_check(release:"6.0", prefix:"asterisk", reference:"1.6.2.9-2+squeeze3")) flag++;
if (deb_check(release:"6.0", prefix:"asterisk-config", reference:"1.6.2.9-2+squeeze3")) flag++;
if (deb_check(release:"6.0", prefix:"asterisk-dbg", reference:"1.6.2.9-2+squeeze3")) flag++;
if (deb_check(release:"6.0", prefix:"asterisk-dev", reference:"1.6.2.9-2+squeeze3")) flag++;
if (deb_check(release:"6.0", prefix:"asterisk-doc", reference:"1.6.2.9-2+squeeze3")) flag++;
if (deb_check(release:"6.0", prefix:"asterisk-h323", reference:"1.6.2.9-2+squeeze3")) flag++;
if (deb_check(release:"6.0", prefix:"asterisk-sounds-main", reference:"1.6.2.9-2+squeeze3")) flag++;
if (flag)
{
if (report_verbosity > 0) security_warning(port:0, extra:deb_report_get());
else security_warning(0);
exit(0);
}
else audit(AUDIT_HOST_NOT, "affected");
Vendor | Product | Version | CPE |
---|---|---|---|
debian | debian_linux | asterisk | p-cpe:/a:debian:debian_linux:asterisk |
debian | debian_linux | 5.0 | cpe:/o:debian:debian_linux:5.0 |
debian | debian_linux | 6.0 | cpe:/o:debian:debian_linux:6.0 |
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2529
cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2535
downloads.asterisk.org/pub/security/AST-2011-008.html
downloads.asterisk.org/pub/security/AST-2011-009.html
downloads.asterisk.org/pub/security/AST-2011-010.html
bugs.debian.org/cgi-bin/bugreport.cgi?bug=631445
bugs.debian.org/cgi-bin/bugreport.cgi?bug=631446
bugs.debian.org/cgi-bin/bugreport.cgi?bug=631448
packages.debian.org/source/squeeze/asterisk
security-tracker.debian.org/tracker/CVE-2011-2529
security-tracker.debian.org/tracker/CVE-2011-2535
www.debian.org/security/2011/dsa-2276