Ubuntu.comUB:CVE-2021-26717CVE-2021-26717
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.002 Low
EPSS
Percentile
56.3%
An issue was discovered in Sangoma Asterisk 16.x before 16.16.1, 17.x
before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before
16.8-cert6. When re-negotiating for T.38, if the initial remote response
was delayed just enough, Asterisk would send both audio and T.38 in the
SDP. If this happened, and the remote responded with a declined T.38
stream, then Asterisk would crash.
Notes
| Author | Note |
|---|---|
| sbeattie | introduced in 16.15.0 upstream |
References
packetstormsecurity.com/files/161471/Asterisk-Project-Security-Advisory-AST-2021-002.html
seclists.org/fulldisclosure/2021/Feb/58
downloads.asterisk.org/pub/security/
downloads.asterisk.org/pub/security/AST-2021-002.html
issues.asterisk.org/jira/browse/ASTERISK-29203
launchpad.net/bugs/cve/CVE-2021-26717
nvd.nist.gov/vuln/detail/CVE-2021-26717
security-tracker.debian.org/tracker/CVE-2021-26717
www.cve.org/CVERecord?id=CVE-2021-26717
Related
5 Medium
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
0.002 Low
EPSS
Percentile
56.3%