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cve[email protected]CVE-2021-26906
HistoryFeb 18, 2021 - 8:15 p.m.

CVE-2021-26906

2021-02-1820:15:12
CWE-404
[email protected]
web.nvd.nist.gov
93
2
cve-2021-26906
sdp negotiation
digium asterisk
sip vulnerability
remote crash
nvd

4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

5.5 Medium

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

57.1%

JSON

An issue was discovered in res_pjsip_session.c in Digium Asterisk through 13.38.1; 14.x, 15.x, and 16.x through 16.16.0; 17.x through 17.9.1; and 18.x through 18.2.0, and Certified Asterisk through 16.8-cert5. An SDP negotiation vulnerability in PJSIP allows a remote server to potentially crash Asterisk by sending specific SIP responses that cause an SDP negotiation failure.

Affected configurations

NVD
Node
digiumasteriskRange13.0.0–13.38.2
OR
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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4.3 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:M/Au:N/C:N/I:N/A:P

5.9 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

5.5 Medium

AI Score

Confidence

High

0.002 Low

EPSS

Percentile

57.1%

JSON
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