CVE-2025-57767

highpriority · track · 0EPSS 0.004 · 35 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.41% (35th) EPSS

CVSS 7.5 · high

Is it mine?

19 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-27

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 get_authorization_header() function in res_pjsip_authenticator_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.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · security-advisories@github.comexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-253US

affected products (19)

Products and version ranges known to be affected.

Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Fedora Linuxall versionscert_bundDEcpe:/o:fedoraproject:fedora:-
Gentoo Linuxall versionscert_bundDEcpe:/o:gentoo:linux:-
Open Source Asterisk <18.26.4all versionscert_bundDE
Open Source Asterisk <18.9-cert17all versionscert_bundDE
Open Source Asterisk <20.15.2all versionscert_bundDE
Open Source Asterisk <21.10.2all versionscert_bundDE
Open Source Asterisk <22.5.2all versionscert_bundDE
Open Source Asterisk< 18.26.4cert_bundDE
Open Source Asterisk< 18.9-cert17cert_bundDE
Open Source Asterisk< 20.15.2cert_bundDE
Open Source Asterisk< 21.10.2cert_bundDE
Open Source Asterisk< 22.5.2cert_bundDE
asterisk asterisk≤ < 21.10.2enisa_euvdEU
asterisk asterisk≤ < 22.5.2enisa_euvdEU
asterisk asterisk≤ < 20.15.2enisa_euvdEU
sangoma asterisk< 20.15.2nvdUScpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*
sangoma asterisk21.0.0 → 21.10.2nvdUScpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*
sangoma asterisk22.0.0 → 22.5.2nvdUScpe:2.3:a:sangoma:asterisk:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-1926Asterisk: Mehrere Schwachstellen ermöglichen Denial of ServiceDeutsch2025-08-28csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Asterisk ausnutzen, um einen Denial of Service Angriff durchzuführen.

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd NVD CVE.org MITRE

published 2025-08-28modified 2026-06-17

references (12)

External citations — patches, advisories, analysis.

scry

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