Asterisk Open Source up to 15.4.0 TCP TLS improper authentication
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.1 | $0-$5k | 0.00 |
A vulnerability was found in Asterisk Open Source up to 15.4.0 (Communications System). It has been declared as problematic. Affected by this vulnerability is an unknown code block of the component TCP TLS. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect availability. The summary by CVE is:
An issue was discovered in Asterisk Open Source 15.x before 15.4.1. When connected to Asterisk via TCP/TLS, if the client abruptly disconnects, or sends a specially crafted message, then Asterisk gets caught in an infinite loop while trying to read the data stream. This renders the system unusable.
The bug was discovered 06/12/2018. The weakness was presented 06/12/2018 by Sean (Website). It is possible to read the advisory at downloads.asterisk.org. This vulnerability is known as CVE-2018-12228 since 06/11/2018. The exploitation appears to be easy. The attack can be launched remotely. The requirement for exploitation is a single authentication. The technical details are unknown and an exploit is not publicly available.
The vulnerability scanner Nessus provides a plugin with the ID 110561 (Asterisk 15.x < 15.4.1 Multiple Vulnerabilities (AST-2018-007 - AST-2018-008)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc. and running in the context r. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371281 (Asterisk Open Source Denial of Service Vulnerability (AST-2018-007)).
Upgrading to version 15.4.1 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.
The vulnerability is also documented in the vulnerability database at Tenable (110561). See 119382 for similar entry.
Product
Type
Vendor
Name
Version
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
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CVSSv3
VulDB Meta Base Score: 5.4VulDB Meta Temp Score: 5.3
VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 6.5
NVD Vector: 🔍
CVSSv2
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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VulDB Base Score: 🔍
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Exploiting
Class: Improper authenticationCWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
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EPSS Percentile: 🔍
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0-Day | unlock | unlock | unlock | unlock |
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Nessus ID: 110561
Nessus Name: Asterisk 15.x < 15.4.1 Multiple Vulnerabilities (AST-2018-007 - AST-2018-008)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Qualys ID: 🔍
Qualys Name: 🔍
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: UpgradeStatus: 🔍
0-Day Time: 🔍
Upgrade: Open Source 15.4.1
Timeline
06/11/2018 🔍06/11/2018 🔍
06/11/2018 🔍
06/12/2018 🔍
06/12/2018 🔍
06/12/2018 🔍
06/12/2018 🔍
06/15/2018 🔍
02/18/2020 🔍
Sources
Advisory: downloads.asterisk.orgResearcher: Sean
Status: Not defined
Confirmation: 🔍
CVE: CVE-2018-12228 (🔍)
SecurityFocus: 104457 - Asterisk Open Source CVE-2018-12228 Denial of Service Vulnerability
See also: 🔍
Entry
Created: 06/12/2018 21:44Updated: 02/18/2020 11:34
Changes: 06/12/2018 21:44 (74), 02/18/2020 11:34 (6)
Complete: 🔍
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