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cve[email protected]CVE-2021-26717
HistoryFeb 18, 2021 - 8:15 p.m.

CVE-2021-26717

2021-02-1820:15:12
[email protected]
web.nvd.nist.gov
77
2
cve-2021-26717
sangoma asterisk
remote crash
security vulnerability
nvd

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

7.4 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

56.4%

JSON

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.

Affected configurations

NVD
Node
digiumasteriskRange16.0.0–16.16.1
OR
digiumasteriskRange17.0.0–17.9.2
OR
digiumasteriskRange18.0–18.2.1
OR
digiumcertified_asteriskMatch16.8-
OR
digiumcertified_asteriskMatch16.8cert1-rc1
OR
digiumcertified_asteriskMatch16.8cert1-rc2
OR
digiumcertified_asteriskMatch16.8cert1-rc3
OR
digiumcertified_asteriskMatch16.8cert1-rc4
OR
digiumcertified_asteriskMatch16.8cert2
OR
digiumcertified_asteriskMatch16.8cert3
OR
digiumcertified_asteriskMatch16.8cert4
OR
digiumcertified_asteriskMatch16.8cert4-rc1
OR
digiumcertified_asteriskMatch16.8cert4-rc2
OR
digiumcertified_asteriskMatch16.8cert4-rc3
OR
digiumcertified_asteriskMatch16.8cert4-rc4
OR
digiumcertified_asteriskMatch16.8cert5

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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

7.4 High

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

56.4%

JSON
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