HOMEVULNERABILITIESCVE-2018-12227
MEDIUM

CVE-2018-12227

CWE-200Published: June 12, 2018· Updated: Jun 17, 2026

5.3
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2018-12227 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

From a weakness classification perspective (CWE-200): Information exposure vulnerabilities leak sensitive data to unauthorized actors.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityLow
IntegrityNone
AvailabilityNone
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected Vendors & Products

Debian1 product(s)
debian linux
digium2 product(s)
asteriskcertified asterisk
Source: NVD CPE · 4 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

PATCHhttps://issues.asterisk.org/jira/browse/ASTERISK-27818
PATCHhttps://issues.asterisk.org/jira/browse/ASTERISK-27818
ADVISORYhttp://downloads.asterisk.org/pub/security/AST-2018-008.html
ADVISORYhttp://www.securityfocus.com/bid/104455
ADVISORYhttps://security.gentoo.org/glsa/201811-11
ADVISORYhttps://www.debian.org/security/2018/dsa-4320
ADVISORYhttp://downloads.asterisk.org/pub/security/AST-2018-008.html
ADVISORYhttp://www.securityfocus.com/bid/104455
ADVISORYhttps://security.gentoo.org/glsa/201811-11
ADVISORYhttps://www.debian.org/security/2018/dsa-4320

All References (10)

→
http://downloads.asterisk.org/pub/security/AST-2018-008.htmlVendor Advisory
→
http://www.securityfocus.com/bid/104455Third Party Advisory · VDB Entry
→
https://issues.asterisk.org/jira/browse/ASTERISK-27818Patch · Vendor Advisory
→
https://security.gentoo.org/glsa/201811-11Third Party Advisory
→
https://www.debian.org/security/2018/dsa-4320Third Party Advisory
→
http://downloads.asterisk.org/pub/security/AST-2018-008.htmlVendor Advisory
→
http://www.securityfocus.com/bid/104455Third Party Advisory · VDB Entry
→
https://issues.asterisk.org/jira/browse/ASTERISK-27818Patch · Vendor Advisory
→
https://security.gentoo.org/glsa/201811-11Third Party Advisory
→
https://www.debian.org/security/2018/dsa-4320Third Party Advisory

Quick Facts

CVE IDCVE-2018-12227
CVSS Score5.3 / 10
SeverityMEDIUM
WeaknessCWE-200
CISA KEVNo
Affected2 vendor(s)
PublishedJun 12, 2018

Related CVEs (CWE-200)

CVE-2008-0082
10.0
CVE-2017-2320
10.0
CVE-2015-2897
10.0
CVE-2014-9162
10.0
CVE-2025-29270
10.0
CVE-2010-1230
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2018-12227 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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