Multiple vulnerabilities in Asterisk Open Source and Certified Asterisk



Risk Medium
Patch available YES
Number of vulnerabilities 3
CVE-ID CVE-2022-37325
CVE-2022-42706
CVE-2022-42705
CWE-ID CWE-191
CWE-269
CWE-416
Exploitation vector Network
Public exploit N/A
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)

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Integer underflow

EUVDB-ID: #VU69829

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-37325

CWE-ID: CWE-191 - Integer underflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to an integer underflow within the ooh323 module. A remote non-authenticated attacker can initiate a call with a zero length called or calling party number, trigger an integer underflow and crash Asterisk.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Asterisk Open Source: 16.0.0 rc1 - 20.0.0

Certified Asterisk: 16.3-cert1 - 18.9-cert2

CPE2.3 External links

https://downloads.asterisk.org/pub/security/AST-2022-007.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.

2) Improper Privilege Management

EUVDB-ID: #VU69828

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-42706

CWE-ID: CWE-269 - Improper Privilege Management

Exploit availability: No

Description

The vulnerability allows a remote user to escalate privileges.

The vulnerability exists due to improper privilege management. A remote user with “config” permissions can view files outside of Asterisk directory via GetConfig AMI Action even if “live_dangerously" is set to "no".

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Asterisk Open Source: 16.0.0 rc1 - 20.0.0

Certified Asterisk: 16.3-cert1 - 18.9-cert2

CPE2.3
External links

https://downloads.asterisk.org/pub/security/AST-2022-009.html


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Use-after-free

EUVDB-ID: #VU69827

Risk: Low

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2022-42705

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote user to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error within res_pjsip_pubsub.c, res_pjsip_outbound_registration.c, pjsip_transport_events.c files when performing activity on a subscription via a reliable transport at the same time Asterisk is also performing activty on that subscription. A remote user can trigger a use-after-free error and perform a denial of service (DoS) attack.


Mitigation

Install updates from vendor's website.

Vulnerable software versions

Asterisk Open Source: 16.0.0 rc1 - 20.0.0

Certified Asterisk: 16.3-cert1 - 18.9-cert2

CPE2.3
External links

https://downloads.asterisk.org/pub/security/AST-2022-008.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.



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