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CVE-2009-3727

UnknownEPSS 4.20%

Last modified

CVE-2009-3727 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 4.20% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability
4.20%

89.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
DigiumAsterisk1.2.0—
DigiumAsterisk1.2.1—
DigiumAsterisk1.2.2—
DigiumAsterisk1.2.3—
DigiumAsterisk1.2.10—
DigiumAsterisk1.2.11—
DigiumAsterisk1.2.12—
DigiumAsterisk1.2.12.1—
DigiumAsterisk1.2.13—
DigiumAsterisk1.2.14—
DigiumAsterisk1.2.15—
DigiumAsterisk1.2.16—
DigiumAsterisk1.2.17—
DigiumAsterisk1.2.18—
DigiumAsterisk1.2.19—
DigiumAsterisk1.2.20—
DigiumAsterisk1.2.21—
DigiumAsterisk1.2.21.1—
DigiumAsterisk1.2.22—
DigiumAsterisk1.2.23—
DigiumAsterisk1.2.24—
DigiumAsterisk1.2.25—
DigiumAsterisk1.2.26—
DigiumAsterisk1.2.26.1—
DigiumAsterisk1.2.26.2—
DigiumAsterisk1.2.27—
DigiumAsterisk1.2.28—
DigiumAsterisk1.2.28.1—
DigiumAsterisk1.2.29—
DigiumAsterisk1.2.30—
DigiumAsterisk1.2.30.1—
DigiumAsterisk1.2.30.2—
DigiumAsterisk1.2.30.3—
DigiumAsterisk1.2.30.4—
DigiumAsterisk1.2.31—
DigiumAsterisk1.2.31.1—
DigiumAsterisk1.2.32—
DigiumAsterisk1.2.33—
DigiumAsterisk1.2.34—
DigiumAsterisk1.4.0—
DigiumAsterisk1.4.1—
DigiumAsterisk1.4.2—
DigiumAsterisk1.4.3—
DigiumAsterisk1.4.4—
DigiumAsterisk1.4.5—
DigiumAsterisk1.4.6—
DigiumAsterisk1.4.7—
DigiumAsterisk1.4.7.1—
DigiumAsterisk1.4.8—
DigiumAsterisk1.4.9—

Showing 50 of 133 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2009-3727?
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.
How severe is CVE-2009-3727?
Severity scoring for CVE-2009-3727 is pending analysis. The EPSS model estimates a 4.20% probability of exploitation in the next 30 days.
How do I fix CVE-2009-3727?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST