CVE-2021-26713

A stack-based buffer overflow in res_rtp_asterisk.c in Sangoma Asterisk before 16.16.1, 17.x before 17.9.2, and 18.x before 18.2.1 and Certified Asterisk before 16.8-cert6 allows an authenticated WebRTC client to cause an Asterisk crash by sending multiple hold/unhold requests in quick succession. This is caused by a signedness comparison mismatch.

CVSS v3.0 6.5 MEDIUM
CVSS v2.0 4.0 MEDIUM

6.5^/10

CVSS v3.0 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:N/I:N/A:P

Exploitability : 8.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://downloads.asterisk.org/pub/security/AST-2021-004.html	Vendor Advisory
https://downloads.asterisk.org/pub/security/	Vendor Advisory
https://issues.asterisk.org/jira/browse/ASTERISK-29205	Vendor Advisory

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Configurations

Configuration 1 (hide)

OR	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::::::

Information

Published : 2021-02-19 12:15

Updated : 2021-02-26 09:02

NVD link : CVE-2021-26713

Mitre link : CVE-2021-26713

JSON object : View

CWE

CWE-787

Out-of-bounds Write

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Products Affected

digium

certified_asterisk
asterisk

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