Vulnerability Name:

CVE-2019-7251 (CCN-157666)

Assigned:2019-02-28
Published:2019-02-28
Updated:2019-04-01
Summary:An Integer Signedness issue (for a return code) in the res_pjsip_sdp_rtp module in Digium Asterisk versions 15.7.1 and earlier and 16.1.1 and earlier allows remote authenticated users to crash Asterisk via a specially crafted SDP protocol violation.
CVSS v3 Severity:6.5 Medium (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
5.7 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): High
7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
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:N/A:H/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): None
Availibility (A): High
CVSS v2 Severity:4.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:S/C:N/I:N/A:P)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (Au): Single_Instance
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Partial
7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Low
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): None
Availibility (A): Complete
Vulnerability Type:CWE-190
Vulnerability Consequences:Denial of Service
References:Source: MITRE
Type: CNA
CVE-2019-7251

Source: CCN
Type: Asterisk Project Security Advisory - AST-2019-001
Remote crash vulnerability with SDP protocol violation

Source: CONFIRM
Type: Patch, Vendor Advisory
https://downloads.asterisk.org/pub/security/AST-2019-001.html

Source: XF
Type: UNKNOWN
asterisk-cve20197251-dos(157666)

Source: CONFIRM
Type: Issue Tracking, Vendor Advisory
https://issues.asterisk.org/jira/browse/ASTERISK-28260

Vulnerable Configuration:Configuration 1:
  • cpe:/a:digium:asterisk:*:*:*:*:*:*:*:* (Version >= 15.0.0 and < 15.7.2)
  • OR cpe:/a:digium:asterisk:*:*:*:*:*:*:*:* (Version >= 16.0.0 and < 16.2.1)

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:com.ubuntu.disco:def:201972510000000
    V
    		CVE-2019-7251 on Ubuntu 19.04 (disco) - medium.
    2019-03-28
    oval:com.ubuntu.bionic:def:20197251000
    V
    		CVE-2019-7251 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-03-28
    oval:com.ubuntu.cosmic:def:201972510000000
    V
    		CVE-2019-7251 on Ubuntu 18.10 (cosmic) - medium.
    2019-03-28
    oval:com.ubuntu.cosmic:def:20197251000
    V
    		CVE-2019-7251 on Ubuntu 18.10 (cosmic) - medium.
    2019-03-28
    oval:com.ubuntu.bionic:def:201972510000000
    V
    		CVE-2019-7251 on Ubuntu 18.04 LTS (bionic) - medium.
    2019-03-28
    oval:com.ubuntu.trusty:def:20197251000
    V
    		CVE-2019-7251 on Ubuntu 14.04 LTS (trusty) - medium.
    2019-03-28
    oval:com.ubuntu.xenial:def:201972510000000
    V
    		CVE-2019-7251 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-03-28
    oval:com.ubuntu.xenial:def:20197251000
    V
    		CVE-2019-7251 on Ubuntu 16.04 LTS (xenial) - medium.
    2019-03-28
    BACK
    digium asterisk *
    digium asterisk *