Multiple vulnerabilities in Cisco IOS XE Software for Catalyst 9000 Family Wireless Controllers
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 3 |
| CVE-ID | CVE-2021-1565 CVE-2021-34768 CVE-2021-34769 |
| CWE-ID | CWE-415 CWE-476 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
Cisco IOS XE Operating systems & Components / Operating system Catalyst 9800 Embedded Wireless Controller Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco Catalyst 9800 Series Wireless Controllers Hardware solutions / Routers & switches, VoIP, GSM, etc Catalyst 9800-CL Wireless Controllers for Cloud Hardware solutions / Routers & switches, VoIP, GSM, etc Cisco Embedded Wireless Controller Software for Catalyst Access Points Hardware solutions / Routers & switches, VoIP, GSM, etc |
| Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains information about 3 vulnerabilities.
1) Double Free
EUVDB-ID: #VU56852
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-2021-1565
CWE-ID:
CWE-415 - Double Free
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol. A remote attacker can pass specially crafted data to the application, trigger double free error and cause a denial of service condition on the target system.
Install updates from vendor's website.
Vulnerable software versionsCisco IOS XE: 17.3.1 - 17.5.1
Catalyst 9800 Embedded Wireless Controller: All versions
Cisco Catalyst 9800 Series Wireless Controllers: All versions
Catalyst 9800-CL Wireless Controllers for Cloud: All versions
Cisco Embedded Wireless Controller Software for Catalyst Access Points: All versions
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) NULL pointer dereference
EUVDB-ID: #VU56854
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-2021-34768
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
Install updates from vendor's website.
Vulnerable software versionsCisco IOS XE: 17.3.1 - 17.5.1
Catalyst 9800 Embedded Wireless Controller: All versions
Cisco Catalyst 9800 Series Wireless Controllers: All versions
Catalyst 9800-CL Wireless Controllers for Cloud: All versions
Cisco Embedded Wireless Controller Software for Catalyst Access Points: All versions
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.
3) NULL pointer dereference
EUVDB-ID: #VU56855
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-2021-34769
CWE-ID:
CWE-476 - NULL Pointer Dereference
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the Control and Provisioning of Wireless Access Points (CAPWAP) protocol. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.
Install updates from vendor's website.
Vulnerable software versionsCisco IOS XE: 17.3.1 - 17.5.1
Catalyst 9800 Embedded Wireless Controller: All versions
Cisco Catalyst 9800 Series Wireless Controllers: All versions
Catalyst 9800-CL Wireless Controllers for Cloud: All versions
Cisco Embedded Wireless Controller Software for Catalyst Access Points: All versions
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.
