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CVE-2011-4597

UnknownEPSS 3.28%

Last modified

CVE-2011-4597 is a vulnerability of currently unknown severity. The SIP over UDP implementation in Asterisk Open Source 1.4.x before 1.4.43, 1.6.x before 1.6.2.21, and 1.8.x before 1.8.7.2 uses different port numbers for responses to invalid requests depending on whether a SIP username exists, which allows remote attackers to enumerate usernames via a series of requests.. EPSS estimates a 3.28% chance of exploitation in the next 30 days.

Description

The SIP over UDP implementation in Asterisk Open Source 1.4.x before 1.4.43, 1.6.x before 1.6.2.21, and 1.8.x before 1.8.7.2 uses different port numbers for responses to invalid requests depending on whether a SIP username exists, which allows remote attackers to enumerate usernames via a series of requests.

Metrics

EPSS Probability
3.28%

86.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersionsUpdate
DigiumAsterisk1.8.0—
DigiumAsterisk1.8.1—
DigiumAsterisk1.8.1.1—
DigiumAsterisk1.8.1.2—
DigiumAsterisk1.8.2—
DigiumAsterisk1.8.2.1—
DigiumAsterisk1.8.2.2—
DigiumAsterisk1.8.2.3—
DigiumAsterisk1.8.2.4—
DigiumAsterisk1.8.3—
DigiumAsterisk1.8.3.1—
DigiumAsterisk1.8.3.2—
DigiumAsterisk1.8.3.3—
DigiumAsterisk1.8.4—
DigiumAsterisk1.8.4.1—
DigiumAsterisk1.8.4.2—
DigiumAsterisk1.8.4.3—
DigiumAsterisk1.8.4.4—
DigiumAsterisk1.8.5—
DigiumAsterisk1.8.5.0—
DigiumAsterisk1.8.6.0—
DigiumAsterisk1.8.7.0—
DigiumAsterisk1.8.7.1—
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—
DigiumAsterisk1.6.2.19—
DigiumAsterisk1.6.2.20—
DigiumAsterisk1.6.2.21—
DigiumAsterisk1.4.0—
DigiumAsterisk1.4.1—
DigiumAsterisk1.4.2—
DigiumAsterisk1.4.3—
DigiumAsterisk1.4.4—
DigiumAsterisk1.4.5—
DigiumAsterisk1.4.6—
DigiumAsterisk1.4.7—

Showing 50 of 113 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2011-4597?
The SIP over UDP implementation in Asterisk Open Source 1.4.x before 1.4.43, 1.6.x before 1.6.2.21, and 1.8.x before 1.8.7.2 uses different port numbers for responses to invalid requests depending on whether a SIP username exists, which allows remote attackers to enumerate usernames via a series of requests.
How severe is CVE-2011-4597?
Severity scoring for CVE-2011-4597 is pending analysis. The EPSS model estimates a 3.28% probability of exploitation in the next 30 days.
How do I fix CVE-2011-4597?
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.

How Strix Helps

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Source: NVD / NIST