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[email protected]NVD:CVE-2021-26717

HistoryFeb 18, 2021 - 8:15 p.m.

CVE-2021-26717

2021-02-1820:15:12

[email protected]

web.nvd.nist.gov

sangoma asterisk

t.38

sdp

certified asterisk

crash

cve-2021-26717

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

CVSS3

7.5

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

EPSS

0.002

Percentile

56.2%

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

digiumasteriskRange17.0.0–17.9.2

digiumasteriskRange18.0–18.2.1

digiumcertified_asteriskMatch16.8-

digiumcertified_asteriskMatch16.8cert1-rc1

digiumcertified_asteriskMatch16.8cert1-rc2

digiumcertified_asteriskMatch16.8cert1-rc3

digiumcertified_asteriskMatch16.8cert1-rc4

digiumcertified_asteriskMatch16.8cert2

digiumcertified_asteriskMatch16.8cert3

digiumcertified_asteriskMatch16.8cert4

digiumcertified_asteriskMatch16.8cert4-rc1

digiumcertified_asteriskMatch16.8cert4-rc2

digiumcertified_asteriskMatch16.8cert4-rc3

digiumcertified_asteriskMatch16.8cert4-rc4

digiumcertified_asteriskMatch16.8cert5

VendorProductVersionCPE
digiumasterisk*cpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digiumcertified_asterisk16.8cpe:2.3:a:digium:certified_asterisk:16.8:-:*:*:*:*:*:*
digiumcertified_asterisk16.8cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc1:*:*:*:*:*:*
digiumcertified_asterisk16.8cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc2:*:*:*:*:*:*
digiumcertified_asterisk16.8cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc3:*:*:*:*:*:*
digiumcertified_asterisk16.8cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc4:*:*:*:*:*:*
digiumcertified_asterisk16.8cpe:2.3:a:digium:certified_asterisk:16.8:cert2:*:*:*:*:*:*
digiumcertified_asterisk16.8cpe:2.3:a:digium:certified_asterisk:16.8:cert3:*:*:*:*:*:*
digiumcertified_asterisk16.8cpe:2.3:a:digium:certified_asterisk:16.8:cert4:*:*:*:*:*:*
digiumcertified_asterisk16.8cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc1:*:*:*:*:*:*

Vendor	Product	Version	CPE
digium	asterisk	*	cpe:2.3:a:digium:asterisk::::::::
digium	certified_asterisk	16.8	cpe:2.3:a:digium:certified_asterisk:16.8:-::::::
digium	certified_asterisk	16.8	cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc1::::::
digium	certified_asterisk	16.8	cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc2::::::
digium	certified_asterisk	16.8	cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc3::::::
digium	certified_asterisk	16.8	cpe:2.3:a:digium:certified_asterisk:16.8:cert1-rc4::::::
digium	certified_asterisk	16.8	cpe:2.3:a:digium:certified_asterisk:16.8:cert2::::::
digium	certified_asterisk	16.8	cpe:2.3:a:digium:certified_asterisk:16.8:cert3::::::
digium	certified_asterisk	16.8	cpe:2.3:a:digium:certified_asterisk:16.8:cert4::::::
digium	certified_asterisk	16.8	cpe:2.3:a:digium:certified_asterisk:16.8:cert4-rc1::::::