CVE-2011-2536 — Sensitive Information Exposure in Asterisk

CWE-200 — Sensitive Information Exposure8 documents4 sources
Severity
5.0MEDIUMNVD
EPSS
0.2%
top 59.49%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Digium AsteriskDebian Asterisk
Timeline
PublishedJul 6
Latest updateMay 17

Description

chan_sip.c in the SIP channel driver in Asterisk Open Source 1.4.x before 1.4.41.2, 1.6.2.x before 1.6.2.18.2, and 1.8.x before 1.8.4.4, and Asterisk Business Edition C.3.x before C.3.7.3, disregards the alwaysauthreject option and generates different responses for invalid SIP requests depending on whether the user account exists, which allows remote attackers to enumerate account names via a series of requests.

CVSS vector

AV:N/AC:L/C:P/I:N/A:NExploitability: 10.0 | Impact: 2.9

Affected Packages3 packages

▶debiandebian/asterisk< asterisk 1:1.8.4.4~dfsg-1 (bullseye)+1
▶Debiandigium/asterisk< 1:1.8.4.4~dfsg-1+1
▶NVDdigium/asterisk114 versions+113

Patches

Patch: downloads.asterisk.org ↗Patch: downloads.asterisk.org ↗

🔴Vulnerability Details

4
GHSA
GHSA-6w9r-hx89-h863: The default configuration of the SIP channel driver in Asterisk Open Source 1↗2022-05-17
▶
GHSA
GHSA-939c-fxc3-rc2x: chan_sip↗2022-05-17
▶
OSV
CVE-2011-2536: chan_sip↗2011-07-06
▶
OSV
CVE-2011-2666: The default configuration of the SIP channel driver in Asterisk Open Source 1↗2011-07-06
▶

📋Vendor Advisories

2
Debian
CVE-2011-2536: asterisk - chan_sip.c in the SIP channel driver in Asterisk Open Source 1.4.x before 1.4.41...↗2011
▶
Debian
CVE-2011-2666: asterisk - The default configuration of the SIP channel driver in Asterisk Open Source 1.4....↗2011
▶