medium
5.3
CWE
404
Advisory Published
Updated

CVE-2020-28327

First published: Fri Nov 06 2020(Updated: )

A res_pjsip_session crash was discovered in Asterisk Open Source 13.x before 13.37.1, 16.x before 16.14.1, 17.x before 17.8.1, and 18.x before 18.0.1. and Certified Asterisk before 16.8-cert5. Upon receiving a new SIP Invite, Asterisk did not return the created dialog locked or referenced. This caused a gap between the creation of the dialog object, and its next use by the thread that created it. Depending on some off-nominal circumstances and timing, it was possible for another thread to free said dialog in this gap. Asterisk could then crash when the dialog object, or any of its dependent objects, were dereferenced or accessed next by the initial-creation thread. Note, however, that this crash can only occur when using a connection-oriented protocol (e.g., TCP or TLS, but not UDP) for SIP transport. Also, the remote client must be authenticated, or Asterisk must be configured for anonymous calling.

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Asterisk Open Source>=13.0.0<13.37.1
Asterisk Open Source>=16.0.0<16.14.1
Asterisk Open Source>=17.0.0<17.8.1
Asterisk Open Source>=18.0.0<18.0.1
Digium Certified Asterisk=16.8
Digium Certified Asterisk=16.8-cert1-rc1
Digium Certified Asterisk=16.8-cert1-rc2
Digium Certified Asterisk=16.8-cert1-rc3
Digium Certified Asterisk=16.8-cert1-rc4
Digium Certified Asterisk=16.8-cert2
Digium Certified Asterisk=16.8-cert3
Digium Certified Asterisk=16.8-cert4
Digium Certified Asterisk=16.8-cert4-rc1
Digium Certified Asterisk=16.8-cert4-rc2
Digium Certified Asterisk=16.8-cert4-rc3
Digium Certified Asterisk=16.8-cert4-rc4
Sangoma Asterisk>=13.0.0<13.37.1
Sangoma Asterisk>=16.0.0<16.14.1
Sangoma Asterisk>=17.0.0<17.8.1
Sangoma Asterisk>=18.0.0<18.0.1

Remedy

http://downloads.asterisk.org/pub/security/AST-2020-001.html

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Frequently Asked Questions

  • What is CVE-2020-28327?

    CVE-2020-28327 is a vulnerability in Asterisk Open Source 13.x before 13.37.1, 16.x before 16.14.1, 17.x before 17.8.1, and 18.x before 18.0.1, as well as Certified Asterisk before 16.8-cert5, that can cause a res_pjsip_session crash.

  • How severe is CVE-2020-28327?

    CVE-2020-28327 has a severity rating of 5.3 (Medium).

  • How does CVE-2020-28327 affect Asterisk Open Source?

    CVE-2020-28327 affects Asterisk Open Source versions 13.x, 16.x, 17.x, and 18.x before the respective patched versions.

  • How does CVE-2020-28327 affect Certified Asterisk?

    CVE-2020-28327 affects Certified Asterisk version 16.8-cert5 and earlier.

  • Where can I find more information about CVE-2020-28327?

    More information about CVE-2020-28327 can be found on the official Asterisk security advisory page (http://downloads.asterisk.org/pub/security/AST-2020-001.html) and the Asterisk issue tracker (https://issues.asterisk.org/jira/browse/ASTERISK-29057).

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203