| Vulnerability Name: | CVE-2018-7285 (CCN-139403) | ||||||||||||||||||||||||||||||||||||||||
| Assigned: | 2018-02-21 | ||||||||||||||||||||||||||||||||||||||||
| Published: | 2018-02-21 | ||||||||||||||||||||||||||||||||||||||||
| Updated: | 2018-03-21 | ||||||||||||||||||||||||||||||||||||||||
| Summary: | A NULL pointer access issue was discovered in Asterisk 15.x through 15.2.1. The RTP support in Asterisk maintains its own registry of dynamic codecs and desired payload numbers. While an SDP negotiation may result in a codec using a different payload number, these desired ones are still stored internally. When an RTP packet was received, this registry would be consulted if the payload number was not found in the negotiated SDP. This registry was incorrectly consulted for all packets, even those which are dynamic. If the payload number resulted in a codec of a different type than the RTP stream (for example, the payload number resulted in a video codec but the stream carried audio), a crash could occur if no stream of that type had been negotiated. This was due to the code incorrectly assuming that a stream of that type would always exist. | ||||||||||||||||||||||||||||||||||||||||
| CVSS v3 Severity: | 7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) 6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
4.6 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C)
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| CVSS v2 Severity: | 5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)
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| Vulnerability Type: | CWE-476 | ||||||||||||||||||||||||||||||||||||||||
| Vulnerability Consequences: | Denial of Service | ||||||||||||||||||||||||||||||||||||||||
| References: | Source: MITRE Type: CNA CVE-2018-7285 Source: CCN Type: Asterisk Project Security Advisory - AST-2018-001 Crash when receiving unnegotiated dynamic payload Source: CONFIRM Type: Patch, Vendor Advisory http://downloads.asterisk.org/pub/security/AST-2018-001.html Source: BID Type: Third Party Advisory, VDB Entry 103149 Source: CCN Type: BID-103149 Asterisk Open Source CVE-2018-7285 Denial of Service Vulnerability Source: SECTRACK Type: Third Party Advisory, VDB Entry 1040415 Source: XF Type: UNKNOWN asterisk-cve20187285-dos(139403) Source: CCN Type: WhiteSource Vulnerability Database CVE-2018-7285 | ||||||||||||||||||||||||||||||||||||||||
| Vulnerable Configuration: | Configuration 1: Denotes that component is vulnerable | ||||||||||||||||||||||||||||||||||||||||
| Oval Definitions | |||||||||||||||||||||||||||||||||||||||||
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