Multiple vulnerabilities in Asterisk
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | N/A |
| CWE-ID | CWE-835 CWE-200 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Asterisk Open Source Server applications / Conferencing, Collaboration and VoIP solutions |
| Vendor | Digium (Linux Support Services) |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Infinite loop
EUVDB-ID: #VU13261
Risk: Low
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: N/A
CWE-ID:
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Exploit availability: No
DescriptionThe vulnerability allows a remote authenticated attacker to cause DoS condition on the target system.
The vulnerability exists due to an error when processing malicious input. A remote attacker can send specially crafted data via TCP/TLS or abruptly disconnect to trigger an iostream read error and cause the target service to enter an infinite loop and become unusable.
MitigationUpdate to version 15.4.1.
Asterisk Open Source: 15.0.0 - 15.2.2
External linkshttp://downloads.asterisk.org/pub/security/AST-2018-007.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
2) Information disclosure
EUVDB-ID: #VU13262
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: N/A
CWE-ID:
CWE-200 - Information exposure
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to obtain potentially sensitive information.
The vulnerability exists due to an error when the system is configured with endpoint-specific access control list (ACL) rules. A remote attacker can send a SIP request to cause the system to return a 403 Forbidden response and disclose the existence of the PJSIP endpoint.
MitigationUpdate to version 13.21.1, 14.7.7 or 15.4.1.
Vulnerable software versionsAsterisk Open Source: 13.0.0 - 15.2.2
External linkshttp://downloads.asterisk.org/pub/security/AST-2018-008.html
Q & A
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.
