CVE-2025-57767 Asterisk can crash from a specifically malformed Authorization header in an incoming SIP request

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.15.2, 21.10.2, and 22.5.2, if a SIP request is received with an Authorization header that contains a realm that wasn't in a previous 401 response's WWW-Authenticate header, or an Authorization header wi...

CVE-2025-57767

Asterisk contains a vulnerability in res_pjsip_authenticator_digest: if a SIP request carries an Authorization header with a realm mismatch relative to a previous 401, or an incorrect realm without a prior 401, get_authorization_header() can return NULL, and subsequent use to obtain the digest al...

CVE-2025-57767 Asterisk can crash from a specifically malformed Authorization header in an incoming SIP request

Asterisk is an open source private branch exchange and telephony toolkit. Prior to versions 20.15.2, 21.10.2, and 22.5.2, if a SIP request is received with an Authorization header that contains a realm that wasn't in a previous 401 response's WWW-Authenticate header, or an Authorization header wi...