CVE-2017-17850

mediumpriority · attend · 56EPSS 0.754 · 100 %ileEUUS

grimoire priorityP1 · Urgent

Exploitable?

—

no known exploitation

Likely / severe?

75.4% (100th) EPSS

CVSS 5 · medium

Is it mine?

6 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

An issue was discovered in Asterisk 13.18.4 and older, 14.7.4 and older, 15.1.4 and older, and 13.18-cert1 and older. A select set of SIP messages create a dialog in Asterisk. Those SIP messages must contain a contact header. For those messages, if the header was not present and the PJSIP channel driver was used, Asterisk would crash. The severity of this vulnerability is somewhat mitigated if authentication is enabled. If authentication is enabled, a user would have to first be authorized before reaching the crash point.

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 · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.07.5highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimary

affected products (6)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
digium asterisk13.0.0 → 13.18.4nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk14.0.0 → 14.7.4nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk15.0.0 → 15.1.4nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium certified asterisk= 13.1.0nvdUScpe:2.3:a:digium:certified_asterisk:*:*:*:*:*:*:*:*
digium certified asterisk= 13.8nvdUScpe:2.3:a:digium:certified_asterisk:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2017-12-27modified 2026-06-17

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+25171 more

references (11)

External citations — patches, advisories, analysis.

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