What’s Vulnerable › Vulnerabilities

CVE-2011-1147

• Severity: medium (CVSS 6.8 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2011-03-15 · updated 2026-06-16
• Weakness: CWE-119

Description

Multiple stack-based and heap-based buffer overflows in the (1) decode_open_type and (2) udptl_rx_packet functions in main/udptl.c in Asterisk Open Source 1.4.x before 1.4.39.2, 1.6.1.x before 1.6.1.22, 1.6.2.x before 1.6.2.16.2, and 1.8 before 1.8.2.4; Business Edition C.x.x before C.3.6.3; AsteriskNOW 1.5; and s800i (Asterisk Appliance), when T.38 support is enabled, allow remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via a crafted UDPTL packet.

Affected products

• Digium Asterisk: 1.4.0, 1.4.0-beta1, 1.4.0-beta2, 1.4.0-beta3, 1.4.0-beta4, 1.4.1 (+195)
• Digium Asterisknow: 1.5
• Digium S800I: all versions

References

• http://downloads.asterisk.org/pub/security/AST-2011-002.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055030.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055421.html
• http://lists.fedoraproject.org/pipermail/package-announce/2011-March/055634.html
• http://secunia.com/advisories/43429
• http://secunia.com/advisories/43702
• http://www.debian.org/security/2011/dsa-2225
• http://www.openwall.com/lists/oss-security/2011/03/11/2
• http://www.openwall.com/lists/oss-security/2011/03/11/8
• http://www.securityfocus.com/bid/46474
• http://www.securitytracker.com/id?1025101
• http://www.vupen.com/english/advisories/2011/0635

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