Home/CVE/An issue was discovered in chan_skinny.c in Asterisk Open Source 13.18.2 and older, 14.7.2 and older, and 15.1.2 and old
CVE

CVE-2017-17090

An issue was discovered in chan_skinny.c in Asterisk Open Source 13.18.2 and older, 14.7.2 and older, and 15.1.2 and old

An issue was discovered in chan_skinny.c in Asterisk Open Source 13.18.2 and older, 14.7.2 and older, and 15.1.2 and older, and Certified Asterisk 13.13-cert7 and older. If the chan_skinny (aka SCCP protocol) channel driver is flooded with certain requests, it can cause the asterisk process to use excessive amounts of virtual memory, eventually causing asterisk to stop processing requests of any kind.

HIGH · CVSS 7.5 EPSS 0.80582
Act now
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 1% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-459Incomplete Cleanup
▤

Affected Products & Versions

5
digium certified asterisk<= 13.13
digium certified asteriskall versions
digium asterisk<= 13.8.2
digium asterisk<= 14.7.2
digium asterisk<= 15.1.2
⚠

Public Exploits & PoCs

2
dosAsterisk 13.17.2 - 'chan_skinny' Remote Memory Corruptionverified
pocwww.exploit-db.com · 43992www.exploit-db.com
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD02 Dec 2017 · 12:29 AM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
🔗

References & Sources

6
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://downloads.digium.com/pub/security/AST-2017-013.htmlVendor Advisory
http://www.securityfocus.com/bid/102023Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1039948
https://issues.asterisk.org/jira/browse/ASTERISK-27452Issue TrackingVendor Advisory
https://lists.debian.org/debian-lts-announce/2017/12/msg00028.html
https://www.debian.org/security/2017/dsa-4076
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