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 with an incorrect realm was received without a previous 401 response being sent, the getauthorizationheader() function in respjsipauthenticator_digest will return a NULL. This wasn't being checked before attempting to get the digest algorithm from the header which causes a SEGV. This issue has been patched in versions 20.15.2, 21.10.2, and 22.5.2. There are no workarounds.
{
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/57xxx/CVE-2025-57767.json",
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-253"
]
}