CVE-2021-26713

2021-02-1920:15:13

Debian Security Bug Tracker

security-tracker.debian.org

stack-based buffer overflow

asterisk

cve-2021-26713

signedness comparison

webrtc

certified asterisk

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

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

CVSS3

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

EPSS

0.002

Percentile

52.5%

JSON

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.

OSVersionArchitecturePackageVersionFilename
Debian11allasterisk< 1:16.28.0~dfsg-0+deb11u4asterisk_1:16.28.0~dfsg-0+deb11u4_all.deb
Debian999allasterisk< 1:20.9.3~dfsg+~cs6.14.60671435-1asterisk_1:20.9.3~dfsg+~cs6.14.60671435-1_all.deb

OS	Version	Architecture	Package	Version	Filename
Debian	11	all	asterisk	< 1:16.28.0~dfsg-0+deb11u4	asterisk_1:16.28.0~dfsg-0+deb11u4_all.deb
Debian	999	all	asterisk	< 1:20.9.3~dfsg+~cs6.14.60671435-1	asterisk_1:20.9.3~dfsg+~cs6.14.60671435-1_all.deb