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…

published December 15, 2011

CVSS
—
EPSS
3%
Percentile
87.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.03158 · 87.8th percentile
Published
2011-12-15T02:00Z
EPSS history
Timeline
  • 15 DEC 02:00Z
    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…
    cvelistv5