CVE-2009-3727

mediumpriority · track · 21EPSS 0.042 · 91 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

4.20% (91st) EPSS

CVSS 5 · medium

Is it mine?

134 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-28

Asterisk Open Source 1.2.x before 1.2.35, 1.4.x before 1.4.26.3, 1.6.0.x before 1.6.0.17, and 1.6.1.x before 1.6.1.9; Business Edition A.x.x, B.x.x before B.2.5.12, C.2.x.x before C.2.4.5, and C.3.x.x before C.3.2.2; AsteriskNOW 1.5; and s800i 1.3.x before 1.3.0.5 generate different error messages depending on whether a SIP username is valid, which allows remote attackers to enumerate valid usernames via multiple crafted REGISTER messages with inconsistent usernames in the URI in the To header and the Digest in the Authorization header.

cvss

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

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode

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

v2.04.3mediumAV:N/AC:L/Au:N/C:P/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-200USprimary

affected products (134)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
digium asterisk= 1.2.0nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.1nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.10nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.11nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.12nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.12.1nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.13nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.14nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.15nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.16nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.17nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.18nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.19nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.2nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.20nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.21nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.21.1nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.22nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*
digium asterisk= 1.2.23nvdUScpe:2.3:a:digium:asterisk:*:*:*:*:*:*:*:*

showing 20 of 134

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2009-11-10modified 2026-06-16

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+19458 more

references (24)

External citations — patches, advisories, analysis.

scry

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