PT-2017-15045 · Sangoma · Asterisk

Ross Beer + 1 · Published 2017-12-23 · Updated 2018-11-25 · CVE-2017-17850

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Asterisk versions 13.18.4 and older Asterisk versions 14.7.4 and older Asterisk versions 15.1.4 and older Asterisk versions 13.18-cert1 and older

Description An issue was discovered where certain SIP messages can cause Asterisk to crash if the contact header is not present and the PJSIP channel driver is used. The severity of this issue is somewhat mitigated if authentication is enabled, as a user would have to be authorized first before reaching the point where the crash occurs.

Recommendations For Asterisk versions 13.18.4 and older, consider disabling the PJSIP channel driver until a patch is available. For Asterisk versions 14.7.4 and older, consider disabling the PJSIP channel driver until a patch is available. For Asterisk versions 15.1.4 and older, consider disabling the PJSIP channel driver until a patch is available. For Asterisk versions 13.18-cert1 and older, consider disabling the PJSIP channel driver until a patch is available.

Fix

RCE

Weakness Enumeration

CWE-20

Related Identifiers

CVE-2017-17850

Affected Products

Asterisk

References · 12

• https://osv.dev/vulnerability/CVE-2017-17850 · Vendor Advisory
• https://issues.asterisk.org/jira/browse/ASTERISK-27480 · Vendor Advisory
• https://ubuntu.com/security/CVE-2017-17850 · Vendor Advisory
• https://security.gentoo.org/glsa/201811-11 · Vendor Advisory
• http://downloads.asterisk.org/pub/security/AST-2017-014.html · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2017-17850 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2017-17850 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2017-17850 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2017-17850 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2017-17850 · Security Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-17850 · Note
• http://securitytracker.com/id/1040056 · Note