Vulnerability Name:

CVE-2019-18790 (CCN-172098)

Assigned:2019-11-21
Published:2019-11-21
Updated:2022-05-13
Summary: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 v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): Low
Integrity (I): Low
Availibility (A): None
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): High
Availibility (A): None
CVSS v2 Severity:5.8 Medium (CVSS v2 Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:C/A:N)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Complete
Availibility (A): None
Vulnerability Type:CWE-862
Vulnerability Consequences:Bypass Security
References:Source: MITRE
Type: CNA
CVE-2019-18790

Source: MISC
Type: Patch, Vendor Advisory
http://downloads.asterisk.org/pub/security/AST-2019-006.html

Source: CCN
Type: Asterisk Project Security Advisory - AST-2019-006
SIP request can change address of a SIP peer

Source: XF
Type: UNKNOWN
asterisk-cve201918790-sec-bypass(172098)

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20191130 [SECURITY] [DLA 2017-1] asterisk security update

Source: MLIST
Type: Mailing List, Third Party Advisory
[debian-lts-announce] 20220403 [SECURITY] [DLA 2969-1] asterisk security update

Source: MISC
Type: Vendor Advisory
https://www.asterisk.org/downloads/security-advisories

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2019-18790

Vulnerable Configuration:Configuration 1:
  • cpe:/a:digium:certified_asterisk:13.21.0:cert4:*:*:*:*:*:*
  • OR cpe:/a:digium:certified_asterisk:13.21.0:cert3:*:*:*:*:*:*
  • OR cpe:/a:digium:certified_asterisk:13.21.0:cert2:*:*:*:*:*:*
  • OR cpe:/a:digium:certified_asterisk:13.21.0:cert1:*:*:*:*:*:*
  • OR cpe:/a:digium:certified_asterisk:13.21.0:rc1:*:*:*:*:*:*
  • OR cpe:/a:digium:asterisk:*:*:*:*:*:*:*:* (Version >= 13.0.0 and < 13.29.2)
  • OR cpe:/a:digium:asterisk:*:*:*:*:*:*:*:* (Version >= 16.0.0 and < 16.6.2)
  • OR cpe:/a:digium:asterisk:*:*:*:*:*:*:*:* (Version >= 17.0.0 and < 17.0.1)
  • OR cpe:/a:digium:certified_asterisk:13.21.0:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/o:debian:debian_linux:8.0:*:*:*:*:*:*:*
  • OR cpe:/o:debian:debian_linux:9.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.disco:def:2019187900000000
    V
    		CVE-2019-18790 on Ubuntu 19.04 (disco) - medium.
    2019-11-22
    oval:com.ubuntu.bionic:def:2019187900000000
    V
    		CVE-2019-18790 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-11-22
    oval:com.ubuntu.xenial:def:2019187900000000
    V
    		CVE-2019-18790 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-11-22
    BACK
    digium certified asterisk 13.21.0 cert4
    digium certified asterisk 13.21.0 cert3
    digium certified asterisk 13.21.0 cert2
    digium certified asterisk 13.21.0 cert1
    digium certified asterisk 13.21.0 rc1
    digium asterisk *
    digium asterisk *
    digium asterisk *
    digium certified asterisk 13.21.0
    debian debian linux 8.0
    debian debian linux 9.0