Denial of service in Cisco Meeting Server
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 2 |
| CVE-ID | CVE-2019-1676 CVE-2019-1678 |
| CWE-ID | CWE-20 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Cisco Meeting Server Client/Desktop applications / Multimedia software |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains information about 2 vulnerabilities.
1) Input validation error
EUVDB-ID: #VU17424
Risk: Medium
CVSSv3.1: 5.9 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-1676
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists in the Session Initiation Protocol (SIP) call processing of Cisco Meeting Server (CMS) due to insufficient validation of Session Description Protocol (SDP) messages. A remote attacker can send a specially crafted SDP message to the CMS call bridge and cause the CMS to reload, causing a DoS condition for all connected clients.
MitigationThe vulnerability has been fixed in the versions 2.3.9, 2.2.14.
Vulnerable software versionsCisco Meeting Server: 2.3.7
External linksQ & 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) Input validation error
EUVDB-ID: #VU17425
Risk: Low
CVSSv3.1: 3.8 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]
CVE-ID: CVE-2019-1678
CWE-ID:
CWE-20 - Improper input validation
Exploit availability: No
DescriptionThe vulnerability allows a remote authenticated attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper validation of coSpaces configuration parameters. A remote attacker can insert specially crafted strings in specific coSpace parameters and prevent clients from joining a conference call in the affected coSpace.
MitigationThe vulnerability has been fixed in the versions 2.3.9, 2.4.3.
Vulnerable software versionsCisco Meeting Server: 2.3.6
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190206-cms-dos
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.
