CVE-2016-9937
Summary
| CVE | CVE-2016-9937 |
|---|---|
| State | PUBLISHED |
| Assigner | mitre |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2016-12-12 21:59:00 UTC |
| Updated | 2026-05-06 22:30:45 UTC |
| Description | An issue was discovered in Asterisk Open Source 13.12.x and 13.13.x before 13.13.1 and 14.x before 14.2.1. If an SDP offer or answer is received with the Opus codec and with the format parameters separated using a space the code responsible for parsing will recursively call itself until it crashes. This occurs as the code does not properly handle spaces separating the parameters. This does NOT require the endpoint to have Opus configured in Asterisk. This also does not require the endpoint to be authenticated. If guest is enabled for chan_sip or anonymous in chan_pjsip an SDP offer or answer is still processed and the crash occurs. |
Risk And Classification
Primary CVSS: v3.0 7.5 HIGH from [email protected]
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.003430000 probability, percentile 0.569120000 (date 2026-05-11)
Problem Types: CWE-119 | n/a
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.0 | [email protected] | Primary | 7.5 | HIGH | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 2.0 | [email protected] | Primary | 5 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
CVSS v3.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v2.0 Breakdown
Access Vector
NetworkAccess Complexity
LowAuthentication
NoneConfidentiality
NoneIntegrity
NoneAvailability
PartialAV:N/AC:L/Au:N/C:N/I:N/A:P
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Digium | Asterisk | 13.12 | All | All | All |
| Application | Digium | Asterisk | 13.13 | All | All | All |
| Application | Digium | Asterisk | 14.0 | All | All | All |
| Application | Digium | Asterisk | 14.01 | All | All | All |
| Application | Digium | Asterisk | 14.02 | All | All | All |
| Application | Digium | Asterisk | 14.1 | All | All | All |
| Application | Digium | Asterisk | 14.1.1 | All | All | All |
| Application | Digium | Asterisk | 14.1.2 | All | All | All |
| Application | Digium | Asterisk | 14.2 | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| AST-2016-008 | af854a3a-2127-422b-91ae-364da2661108 | downloads.asterisk.org | Patch, Vendor Advisory |
| Asterisk Open Source AST-2016-008 Denial of Service Vulnerability | af854a3a-2127-422b-91ae-364da2661108 | www.securityfocus.com | Third Party Advisory, VDB Entry |
| Asterisk Message Parsing Flaw in sdp_fmtp_get() Lets Remote Users Cause the Target Service to Crash - SecurityTracker | af854a3a-2127-422b-91ae-364da2661108 | www.securitytracker.com | |
| downloads.asterisk.org/pub/security/AST-2016-008-13.diff | af854a3a-2127-422b-91ae-364da2661108 | downloads.asterisk.org | Patch, Vendor Advisory |
| downloads.asterisk.org/pub/security/AST-2016-008-14.diff | af854a3a-2127-422b-91ae-364da2661108 | downloads.asterisk.org | Patch, Vendor Advisory |
| [ASTERISK-26579] codec_opus: Recursiveness when parsing fmtp line - Digium/Asterisk JIRA | af854a3a-2127-422b-91ae-364da2661108 | issues.asterisk.org | Patch, Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.