High severity · published Nov 9, 2017
CVE-2017-16671
A Buffer Overflow issue was discovered in Asterisk Open Source 13 before 13.18.1, 14 before 14.7.1, and 15 before 15.1.1 and Certified Asterisk 13.13 before 13.13-cert7
8.8
CVSS
4.2%
EPSS
No
On KEV
Description
A Buffer Overflow issue was discovered in Asterisk Open Source 13 before 13.18.1, 14 before 14.7.1, and 15 before 15.1.1 and Certified Asterisk 13.13 before 13.13-cert7. No size checking is done when setting the user field for Party B on a CDR. Thus, it is possible for someone to use an arbitrarily large string and write past the end of the user field storage buffer. NOTE: this is different from CVE-2017-7617, which was only about the Party A buffer.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.2% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
AS
Asterisk · Digium
13.0.0 before 13.18.1; 14.0.0 before 14.7.1; 15.0.0 before 15.1.1 · source: NVD
CA
Certified Asterisk · Digium
13.13.0; 13.13.0; 13.13.0; 13.13.0; 13.13.0; 13.13.0; +5 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2017-16671
CVE.org
https://www.cve.org/CVERecord?id=CVE-2017-16671
Vendor Advisory
http://downloads.digium.com/pub/security/AST-2017-010.html
Third Party Advisory
http://www.securityfocus.com/bid/101760
Issue Tracking
https://issues.asterisk.org/jira/browse/ASTERISK-27337
security.gentoo.org
https://security.gentoo.org/glsa/201811-11
www.debian.org
https://www.debian.org/security/2017/dsa-4076
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