CVE-2021-31878

2021-07-3014:15:16

Debian Security Bug Tracker

security-tracker.debian.org

cve-2021-31878

pjsip

asterisk

vulnerability

re-invite

sdp

bye request

unix

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

0.003

Percentile

70.1%

JSON

An issue was discovered in PJSIP in Asterisk before 16.19.1 and before 18.5.1. To exploit, a re-INVITE without SDP must be received after Asterisk has sent a BYE request.

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