Asterisk update for pjsip
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-32686 |
| CWE-ID | CWE-248 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Certified Asterisk Server applications / Conferencing, Collaboration and VoIP solutions Asterisk Open Source Server applications / Conferencing, Collaboration and VoIP solutions |
| Vendor | Digium (Linux Support Services) |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Uncaught Exception
EUVDB-ID: #VU55295
Risk: Medium
CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2021-32686
CWE-ID:
CWE-248 - Uncaught Exception
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The
vulnerability exists due to uncaught exception in pjsip when processing TLS handshake. A remote
attacker can initiate TLS connection with the software and then destroy
the socket during handshake, causing the application to crash.
Install update from vendor's website.
Vulnerable software versionsCertified Asterisk: 16.8-cert1 - 16.8-cert9
Asterisk Open Source: 13.0.0 - 18.5.0 rc1
External linkshttp://downloads.asterisk.org/pub/security/AST-2021-009.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.
