ID CVE-2018-12227
Summary An issue was discovered in Asterisk Open Source 13.x before 13.21.1, 14.x before 14.7.7, and 15.x before 15.4.1 and Certified Asterisk 13.18-cert before 13.18-cert4 and 13.21-cert before 13.21-cert2. When endpoint specific ACL rules block a SIP request, they respond with a 403 forbidden. However, if an endpoint is not identified, then a 401 unauthorized response is sent. This vulnerability just discloses which requests hit a defined endpoint. The ACL rules cannot be bypassed to gain access to the disclosed endpoints.
References
Vulnerable Configurations
  • Digium Asterisk 13.0.0 LTS
    cpe:2.3:a:digium:asterisk:13.0.0:-:-:-:lts
  • Digium Asterisk 13.0.0 Beta 1
    cpe:2.3:a:digium:asterisk:13.0.0:beta1
  • Digium Asterisk 13.0.0 Beta 2
    cpe:2.3:a:digium:asterisk:13.0.0:beta2
  • Digium Asterisk 13.0.0 Beta 3
    cpe:2.3:a:digium:asterisk:13.0.0:beta3
  • Digium Asterisk 13.0.1
    cpe:2.3:a:digium:asterisk:13.0.1
  • Digium Asterisk 13.0.2
    cpe:2.3:a:digium:asterisk:13.0.2
  • Digium Asterisk 13.1.0
    cpe:2.3:a:digium:asterisk:13.1.0
  • Digium Asterisk 13.1.0 release candidate 1
    cpe:2.3:a:digium:asterisk:13.1.0:rc1
  • Digium Asterisk 13.1.0 release candidate 2
    cpe:2.3:a:digium:asterisk:13.1.0:rc2
  • Digium Asterisk 13.1.1
    cpe:2.3:a:digium:asterisk:13.1.1
  • Digium Asterisk 13.2.0
    cpe:2.3:a:digium:asterisk:13.2.0
  • Digium Asterisk 13.2.0 release candidate 1
    cpe:2.3:a:digium:asterisk:13.2.0:rc1
  • Digium Asterisk 13.2.1
    cpe:2.3:a:digium:asterisk:13.2.1
  • Digium Asterisk 13.3.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:13.3.0:rc1
  • Digium Asterisk 13.3.2
    cpe:2.3:a:digium:asterisk:13.3.2
  • Digium Asterisk 13.4.0
    cpe:2.3:a:digium:asterisk:13.4.0
  • Digium Asterisk 13.4.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:13.4.0:rc1
  • Digium Asterisk 13.5.0
    cpe:2.3:a:digium:asterisk:13.5.0
  • Digium Asterisk 13.5.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:13.5.0:rc1
  • Digium Asterisk 13.6.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:13.6.0:rc1
  • Digium Asterisk 13.7.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:13.7.0:rc1
  • Digium Asterisk 13.7.0 Release Candidate 2
    cpe:2.3:a:digium:asterisk:13.7.0:rc2
  • Digium Asterisk 13.7.1
    cpe:2.3:a:digium:asterisk:13.7.1
  • Digium Asterisk 13.7.2
    cpe:2.3:a:digium:asterisk:13.7.2
  • Digium Asterisk 13.8.0
    cpe:2.3:a:digium:asterisk:13.8.0
  • Digium Asterisk 13.8.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:13.8.0:rc1
  • Digium Asterisk 13.8.1
    cpe:2.3:a:digium:asterisk:13.8.1
  • Digium Asterisk 13.8.2
    cpe:2.3:a:digium:asterisk:13.8.2
  • Digium Asterisk 13.9.0
    cpe:2.3:a:digium:asterisk:13.9.0
  • Digium Asterisk 13.9.1
    cpe:2.3:a:digium:asterisk:13.9.1
  • Digium Asterisk 13.10.0
    cpe:2.3:a:digium:asterisk:13.10.0
  • Digium Asterisk 13.10.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:13.10.0:rc1
  • Digium Asterisk 13.11.0
    cpe:2.3:a:digium:asterisk:13.11.0
  • Digium Asterisk 13.11.1
    cpe:2.3:a:digium:asterisk:13.11.1
  • Digium Asterisk 13.11.2
    cpe:2.3:a:digium:asterisk:13.11.2
  • Digium Asterisk 13.12
    cpe:2.3:a:digium:asterisk:13.12
  • Digium Asterisk 13.12.0
    cpe:2.3:a:digium:asterisk:13.12.0
  • Digium Asterisk 13.12.1
    cpe:2.3:a:digium:asterisk:13.12.1
  • Digium Asterisk 13.12.2
    cpe:2.3:a:digium:asterisk:13.12.2
  • Digium Asterisk 13.13
    cpe:2.3:a:digium:asterisk:13.13
  • Digium Asterisk 13.13.0
    cpe:2.3:a:digium:asterisk:13.13.0
  • Digium Asterisk 13.13.1
    cpe:2.3:a:digium:asterisk:13.13.1
  • Digium Asterisk 13.14.0
    cpe:2.3:a:digium:asterisk:13.14.0
  • Digium Asterisk 13.14.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:13.14.0:rc1
  • Digium Asterisk 13.14.0 Release Candidate 2
    cpe:2.3:a:digium:asterisk:13.14.0:rc2
  • Digium Asterisk 13.14.1
    cpe:2.3:a:digium:asterisk:13.14.1
  • Digium Asterisk 13.15.0
    cpe:2.3:a:digium:asterisk:13.15.0
  • Digium Asterisk 13.15.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:13.15.0:rc1
  • Digium Asterisk 13.15.0 Release Candidate 2
    cpe:2.3:a:digium:asterisk:13.15.0:rc2
  • Digium Asterisk 13.15.0 Release Candidate 3
    cpe:2.3:a:digium:asterisk:13.15.0:rc3
  • Digium Asterisk 13.15.1
    cpe:2.3:a:digium:asterisk:13.15.1
  • Digium Asterisk 13.16.0
    cpe:2.3:a:digium:asterisk:13.16.0
  • Digium Asterisk 13.16.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:13.16.0:rc1
  • Digium Asterisk 13.16.0 Release Candidate 2
    cpe:2.3:a:digium:asterisk:13.16.0:rc2
  • Digium Asterisk 13.17.0
    cpe:2.3:a:digium:asterisk:13.17.0
  • Digium Asterisk 13.17.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:13.17.0:rc1
  • Digium Asterisk 14.0.1
    cpe:2.3:a:digium:asterisk:14.0.1
  • Digium Asterisk 14.0.2
    cpe:2.3:a:digium:asterisk:14.0.2
  • Digium Asterisk 14.01
    cpe:2.3:a:digium:asterisk:14.01
  • Digium Asterisk 14.1.0
    cpe:2.3:a:digium:asterisk:14.1.0
  • Digium Asterisk 14.1.1
    cpe:2.3:a:digium:asterisk:14.1.1
  • Digium Asterisk 14.1.2
    cpe:2.3:a:digium:asterisk:14.1.2
  • Digium Asterisk 14.02
    cpe:2.3:a:digium:asterisk:14.02
  • Digium Asterisk 14.2.0
    cpe:2.3:a:digium:asterisk:14.2.0
  • Digium Asterisk 14.2.1
    cpe:2.3:a:digium:asterisk:14.2.1
  • Digium Asterisk 14.3.0
    cpe:2.3:a:digium:asterisk:14.3.0
  • Digium Asterisk 14.3.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:14.3.0:rc1
  • Digium Asterisk 14.3.0 Release Candidate 2
    cpe:2.3:a:digium:asterisk:14.3.0:rc2
  • Digium Asterisk 14.3.1
    cpe:2.3:a:digium:asterisk:14.3.1
  • Digium Asterisk 14.4.0
    cpe:2.3:a:digium:asterisk:14.4.0
  • Digium Asterisk 14.4.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:14.4.0:rc1
  • Digium Asterisk 14.4.0 Release Candidate 2
    cpe:2.3:a:digium:asterisk:14.4.0:rc2
  • Digium Asterisk 14.4.0 Release Candidate 3
    cpe:2.3:a:digium:asterisk:14.4.0:rc3
  • Digium Asterisk 14.4.1
    cpe:2.3:a:digium:asterisk:14.4.1
  • Digium Asterisk 14.5.0
    cpe:2.3:a:digium:asterisk:14.5.0
  • Digium Asterisk 14.5.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:14.5.0:rc1
  • Digium Asterisk 14.5.0 Release Candidate 2
    cpe:2.3:a:digium:asterisk:14.5.0:rc2
  • Digium Asterisk 14.6.0
    cpe:2.3:a:digium:asterisk:14.6.0
  • Digium Asterisk 14.6.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:14.6.0:rc1
  • Digium Asterisk 15.0.0
    cpe:2.3:a:digium:asterisk:15.0.0
  • Digium Asterisk 15.0.0 Beta1
    cpe:2.3:a:digium:asterisk:15.0.0:beta1
  • Digium Asterisk 15.0.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:15.0.0:rc1
  • Digium Asterisk 15.1.3
    cpe:2.3:a:digium:asterisk:15.1.3
  • Digium Asterisk 15.1.4
    cpe:2.3:a:digium:asterisk:15.1.4
  • Digium Asterisk 15.1.5
    cpe:2.3:a:digium:asterisk:15.1.5
  • Digium Asterisk 15.2.0
    cpe:2.3:a:digium:asterisk:15.2.0
  • Digium Asterisk 15.2.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:15.2.0:rc1
  • Digium Asterisk 15.2.0 Release Candidate 2
    cpe:2.3:a:digium:asterisk:15.2.0:rc2
  • Digium Asterisk 15.2.1
    cpe:2.3:a:digium:asterisk:15.2.1
  • Digium Asterisk 15.2.2
    cpe:2.3:a:digium:asterisk:15.2.2
  • Digium Asterisk 15.3.0
    cpe:2.3:a:digium:asterisk:15.3.0
  • Digium Asterisk 15.3.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:15.3.0:rc1
  • Digium Asterisk 15.3.0 Release Candidate 2
    cpe:2.3:a:digium:asterisk:15.3.0:rc2
  • Digium Asterisk 15.4.0
    cpe:2.3:a:digium:asterisk:15.4.0
  • Digium Asterisk 15.4.0 Release Candidate 1
    cpe:2.3:a:digium:asterisk:15.4.0:rc1
  • Digium Asterisk 15.4.0 Release Candidate 2
    cpe:2.3:a:digium:asterisk:15.4.0:rc2
  • cpe:2.3:a:digium:certified_asterisk:13.18:cert1
    cpe:2.3:a:digium:certified_asterisk:13.18:cert1
  • cpe:2.3:a:digium:certified_asterisk:13.18:cert2
    cpe:2.3:a:digium:certified_asterisk:13.18:cert2
  • cpe:2.3:a:digium:certified_asterisk:13.18:cert3
    cpe:2.3:a:digium:certified_asterisk:13.18:cert3
  • cpe:2.3:a:digium:certified_asterisk:13.21:cert1
    cpe:2.3:a:digium:certified_asterisk:13.21:cert1
  • Debian Linux 9.0
    cpe:2.3:o:debian:debian_linux:9.0
CVSS
Base: 5.0
Impact:
Exploitability:
CWE CWE-200
CAPEC
  • Subverting Environment Variable Values
    The attacker directly or indirectly modifies environment variables used by or controlling the target software. The attacker's goal is to cause the target software to deviate from its expected operation in a manner that benefits the attacker.
  • Footprinting
    An attacker engages in probing and exploration activity to identify constituents and properties of the target. Footprinting is a general term to describe a variety of information gathering techniques, often used by attackers in preparation for some attack. It consists of using tools to learn as much as possible about the composition, configuration, and security mechanisms of the targeted application, system or network. Information that might be collected during a footprinting effort could include open ports, applications and their versions, network topology, and similar information. While footprinting is not intended to be damaging (although certain activities, such as network scans, can sometimes cause disruptions to vulnerable applications inadvertently) it may often pave the way for more damaging attacks.
  • Exploiting Trust in Client (aka Make the Client Invisible)
    An attack of this type exploits a programs' vulnerabilities in client/server communication channel authentication and data integrity. It leverages the implicit trust a server places in the client, or more importantly, that which the server believes is the client. An attacker executes this type of attack by placing themselves in the communication channel between client and server such that communication directly to the server is possible where the server believes it is communicating only with a valid client. There are numerous variations of this type of attack.
  • Browser Fingerprinting
    An attacker carefully crafts small snippets of Java Script to efficiently detect the type of browser the potential victim is using. Many web-based attacks need prior knowledge of the web browser including the version of browser to ensure successful exploitation of a vulnerability. Having this knowledge allows an attacker to target the victim with attacks that specifically exploit known or zero day weaknesses in the type and version of the browser used by the victim. Automating this process via Java Script as a part of the same delivery system used to exploit the browser is considered more efficient as the attacker can supply a browser fingerprinting method and integrate it with exploit code, all contained in Java Script and in response to the same web page request by the browser.
  • Session Credential Falsification through Prediction
    This attack targets predictable session ID in order to gain privileges. The attacker can predict the session ID used during a transaction to perform spoofing and session hijacking.
  • Reusing Session IDs (aka Session Replay)
    This attack targets the reuse of valid session ID to spoof the target system in order to gain privileges. The attacker tries to reuse a stolen session ID used previously during a transaction to perform spoofing and session hijacking. Another name for this type of attack is Session Replay.
  • Using Slashes in Alternate Encoding
    This attack targets the encoding of the Slash characters. An attacker would try to exploit common filtering problems related to the use of the slashes characters to gain access to resources on the target host. Directory-driven systems, such as file systems and databases, typically use the slash character to indicate traversal between directories or other container components. For murky historical reasons, PCs (and, as a result, Microsoft OSs) choose to use a backslash, whereas the UNIX world typically makes use of the forward slash. The schizophrenic result is that many MS-based systems are required to understand both forms of the slash. This gives the attacker many opportunities to discover and abuse a number of common filtering problems. The goal of this pattern is to discover server software that only applies filters to one version, but not the other.
nessus via4
  • NASL family Debian Local Security Checks
    NASL id DEBIAN_DSA-4320.NASL
    description Multiple vulnerabilities have been discovered in Asterisk, an open source PBX and telephony toolkit, which may result in denial of service or information disclosure.
    last seen 2019-02-21
    modified 2018-11-13
    plugin id 118158
    published 2018-10-17
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=118158
    title Debian DSA-4320-1 : asterisk - security update
  • NASL family Gentoo Local Security Checks
    NASL id GENTOO_GLSA-201811-11.NASL
    description The remote host is affected by the vulnerability described in GLSA-201811-11 (Asterisk: Multiple vulnerabilities) Multiple vulnerabilities have been discovered in Asterisk. Please review the referenced CVE identifiers for details. Impact : A remote attacker could cause a Denial of Service condition or conduct information gathering. Workaround : There is no known workaround at this time.
    last seen 2019-02-21
    modified 2018-11-26
    plugin id 119131
    published 2018-11-26
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=119131
    title GLSA-201811-11 : Asterisk: Multiple vulnerabilities
  • NASL family Misc.
    NASL id ASTERISK_AST_15_X_2018_007-008.NASL
    description According to its SIP banner, the version of Asterisk running on the remote host is 15.x prior to 15.4.1. It is therefore, affected by multiple vulnerabilities as described in AST-2018-007 & AST-2018-008 advisories. Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
    last seen 2019-02-21
    modified 2018-12-07
    plugin id 110561
    published 2018-06-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=110561
    title Asterisk 15.x < 15.4.1 Multiple Vulnerabilities (AST-2018-007 - AST-2018-008)
  • NASL family Misc.
    NASL id ASTERISK_AST_2018_008.NASL
    description According to its SIP banner, the version of Asterisk running on the remote host is 13.x prior to 13.21.1, 14.x prior to 14.7.7, or 13.18 prior to 13.18-cert4. It is therefore, affected by a remote denial of service attack as described in AST-2018-008. Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
    last seen 2019-02-21
    modified 2018-12-07
    plugin id 110562
    published 2018-06-15
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=110562
    title Asterisk 13.x < 13.21.1 / 14.x < 14.7.7 / 13.13 < 13.18-cert4 / 13.21 < 13.21-cert2 Information Disclosure Vulnerability (AST-2018-008)
refmap via4
bid 104455
confirm
debian DSA-4320
gentoo GLSA-201811-11
Last major update 12-06-2018 - 00:29
Published 12-06-2018 - 00:29
Last modified 29-03-2019 - 12:22
Back to Top