High severity · published Feb 18, 2021
CVE-2021-26712
Incorrect access controls in res_srtp.c in Sangoma Asterisk 13.38.1, 16.16.0, 17.9.1, and 18.2.0 and Certified Asterisk 16.8-cert5 allow a remote unauthenticated attacker to…
7.5
CVSS
3.6%
EPSS
No
On KEV
Description
Incorrect access controls in res_srtp.c in Sangoma Asterisk 13.38.1, 16.16.0, 17.9.1, and 18.2.0 and Certified Asterisk 16.8-cert5 allow a remote unauthenticated attacker to prematurely terminate secure calls by replaying SRTP packets.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.6% · higher than 89% 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 through 13.38.2; 16.0.0 before 16.16.1; 17.0.0 before 17.9.2; 18.0 before 18.2.1 · source: NVD
CA
Certified Asterisk · Digium
16.8; 16.8; 16.8; 16.8; 16.8; 16.8; +7 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-26712
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-26712
Third Party Advisory
http://packetstormsecurity.com/files/161473/Asterisk-Project-Security-Advisory-AST-2021-003.html
Mailing List
http://seclists.org/fulldisclosure/2021/Feb/59
Vendor Advisory
https://downloads.asterisk.org/pub/security/
Vendor Advisory
https://downloads.asterisk.org/pub/security/AST-2021-003.html
Issue Tracking
https://issues.asterisk.org/jira/browse/ASTERISK-29260
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