Vulnerability identifier: #VU15804
Vulnerability risk: Low
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-200
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Asterisk Open Source
Server applications /
Conferencing, Collaboration and VoIP solutions
Certified Asterisk
Server applications /
Conferencing, Collaboration and VoIP solutions
Vendor: Digium (Linux Support Services)
Description
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to application responds with different error codes depending on presence of ACL rules for SIP requests. A remote attacker can identify presence of ACL rules.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Asterisk Open Source: 15.0.0 - 15.4.0, 14.0 - 14.7.6, 13.0.0 - 13.19.2
Certified Asterisk: 13.18 - 13.21-cert1
External links
http://downloads.asterisk.org/pub/security/AST-2018-008.html
http://issues.asterisk.org/jira/browse/ASTERISK-27818
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.