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CVE-2011-2666

UnknownEPSS 1.33%

Last modified

CVE-2011-2666 is a vulnerability of currently unknown severity. The default configuration of the SIP channel driver in Asterisk Open Source 1.4.x through 1.4.41.2 and 1.6.2.x through 1.6.2.18.2 does not enable the alwaysauthreject option, which allows remote attackers to enumerate account names by making a series of invalid SIP requests and observing the differences in the responses for different usernames, a different vulnerability than CVE-2011-2536.. EPSS estimates a 1.33% chance of exploitation in the next 30 days.

Description

The default configuration of the SIP channel driver in Asterisk Open Source 1.4.x through 1.4.41.2 and 1.6.2.x through 1.6.2.18.2 does not enable the alwaysauthreject option, which allows remote attackers to enumerate account names by making a series of invalid SIP requests and observing the differences in the responses for different usernames, a different vulnerability than CVE-2011-2536.

Metrics

EPSS Probability
1.33%

67.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
DigiumAsterisk1.6.2.0—
DigiumAsterisk1.6.2.1—
DigiumAsterisk1.6.2.2—
DigiumAsterisk1.6.2.3Rc2
DigiumAsterisk1.6.2.4—
DigiumAsterisk1.6.2.5—
DigiumAsterisk1.6.2.6—
DigiumAsterisk1.6.2.15Rc1
DigiumAsterisk1.6.2.16—
DigiumAsterisk1.6.2.16.1—
DigiumAsterisk1.6.2.16.2—
DigiumAsterisk1.6.2.17—
DigiumAsterisk1.6.2.17.1—
DigiumAsterisk1.6.2.17.2—
DigiumAsterisk1.6.2.17.3—
DigiumAsterisk1.6.2.18—
DigiumAsterisk1.6.2.18.1—
DigiumAsterisk1.6.2.18.2—
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—
DigiumAsterisk1.4.10—
DigiumAsterisk1.4.10.1—
DigiumAsterisk1.4.11—
DigiumAsterisk1.4.12—
DigiumAsterisk1.4.12.1—
DigiumAsterisk1.4.13—
DigiumAsterisk1.4.14—
DigiumAsterisk1.4.15—
DigiumAsterisk1.4.16—
DigiumAsterisk1.4.16.1—
DigiumAsterisk1.4.16.2—
DigiumAsterisk1.4.17—
DigiumAsterisk1.4.18—
DigiumAsterisk1.4.19—
DigiumAsterisk1.4.19.1—
DigiumAsterisk1.4.19.2—
DigiumAsterisk1.4.20—
DigiumAsterisk1.4.20.1—
DigiumAsterisk1.4.21—
DigiumAsterisk1.4.21.1—
DigiumAsterisk1.4.21.2—

Showing 50 of 88 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2011-2666?
The default configuration of the SIP channel driver in Asterisk Open Source 1.4.x through 1.4.41.2 and 1.6.2.x through 1.6.2.18.2 does not enable the alwaysauthreject option, which allows remote attackers to enumerate account names by making a series of invalid SIP requests and observing the differences in the responses for different usernames, a different vulnerability than CVE-2011-2536.
How severe is CVE-2011-2666?
Severity scoring for CVE-2011-2666 is pending analysis. The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.
How do I fix CVE-2011-2666?
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