Vulnerability Details : 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 prematurely terminate secure calls by replaying SRTP packets.
Products affected by CVE-2021-26712
- cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
- cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:-:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc4:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert2:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert3:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert4:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc1:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc2:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc3:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc4:*:*:*:*:*:*
- cpe:2.3:a:digium:certified_asterisk:16.8:cert5:*:*:*:*:*:*
Threat overview for CVE-2021-26712
Top countries where our scanners detected CVE-2021-26712
Top open port discovered on systems with this issue
80
IPs affected by CVE-2021-26712 28,436
Threat actors abusing to this issue?
Yes
Find out if you* are
affected by CVE-2021-26712!
*Directly or indirectly through your vendors, service providers and 3rd parties.
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attack surface intelligence
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Exploit prediction scoring system (EPSS) score for CVE-2021-26712
1.53%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 86 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-26712
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
5.0
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:N/A:P |
10.0
|
2.9
|
NIST | |
|
7.5
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
3.9
|
3.6
|
NIST |
References for CVE-2021-26712
-
https://downloads.asterisk.org/pub/security/AST-2021-003.html
AST-2021-003Vendor Advisory
-
https://issues.asterisk.org/jira/browse/ASTERISK-29260
[ASTERISK-29260] sRTP Replay Protection ignored; even tears down long calls - Digium/Asterisk JIRAIssue Tracking;Patch;Vendor Advisory
-
http://seclists.org/fulldisclosure/2021/Feb/59
Full Disclosure: AST-2021-003: Remote attacker could prematurely tear down SRTP callsMailing List;Third Party Advisory
-
https://downloads.asterisk.org/pub/security/
Index of /pub/securityVendor Advisory
-
http://packetstormsecurity.com/files/161473/Asterisk-Project-Security-Advisory-AST-2021-003.html
Asterisk Project Security Advisory - AST-2021-003 ≈ Packet StormThird Party Advisory
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