Access Restriction Bypass Affecting asterisk package, versions [13.0.0,13.29.2)[16.0.0,16.6.2)[17.0.0,17.0.1)


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.33% (72nd percentile)

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  • Snyk IDSNYK-UNMANAGED-ASTERISK-2371559
  • published26 Jan 2022
  • disclosed22 Nov 2019
  • creditUnknown

Introduced: 22 Nov 2019

CVE-2019-18790  (opens in a new tab)
CWE-862  (opens in a new tab)

How to fix?

Upgrade asterisk to version 13.29.2, 16.6.2, 17.0.1 or higher.

Overview

Affected versions of this package are vulnerable to Access Restriction Bypass. An issue was discovered in channels/chan_sip.c in Sangoma Asterisk 13.x before 13.29.2, 16.x before 16.6.2, and 17.x before 17.0.1, and Certified Asterisk 13.21 before cert5. A SIP request can be sent to Asterisk that can change a SIP peer's IP address. A REGISTER does not need to occur, and calls can be hijacked as a result. The only thing that needs to be known is the peer's name; authentication details such as passwords do not need to be known. This vulnerability is only exploitable when the nat option is set to the default, or auto_force_rport.

CVSS Base Scores

version 3.1