CVE-2020-3511
published 2020-09-24CVE-2020-3511: A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a reload of an…
PriorityP433high7.4CVSS 3.1
AVAACLPRNUINSCCNINAH
EPSS
0.43%
35.5th percentile
A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient input validation when the ISDN Q.931 messages are processed. An attacker could exploit this vulnerability by sending a malicious ISDN Q.931 message to an affected device. A successful exploit could allow the attacker to cause the process to crash, resulting in a reload of the affected device.
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_ios | — | — |
| cisco | ios_and_ios_xe | — | — |
| cisco | ios_xe | — | — |
CVSS provenance
nvdv3.17.4HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
nvdv3.07.4HIGHCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
nvdv2.06.1MEDIUMAV:A/AC:L/Au:N/C:N/I:N/A:C
vendor_cisco7.4HIGH
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Cisco
Cisco IOS and IOS XE Software ISDN Q.931 Denial of Service Vulnerability
vendor_cisco·2020-09-24·CVSS 7.4
CVE-2020-3511 [HIGH] CWE-20 Cisco IOS and IOS XE Software ISDN Q.931 Denial of Service Vulnerability
Cisco IOS and IOS XE Software ISDN Q.931 Denial of Service Vulnerability
A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition.
The vulnerability is due to insufficient input validation when the ISDN Q.931 messages are processed. An attacker could exploit this vulnerability by sending a malicious ISDN Q.931 message to an affected device. A successful exploit could allow the attacker to cause the process to crash, resulting in a reload of the affected device.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the fo
Cisco
Cisco IOS and IOS XE Software ISDN Q.931 Denial of Service Vulnerability
vendor_cisco·CVSS 3.0
CVE-2020-3511 Cisco IOS and IOS XE Software ISDN Q.931 Denial of Service Vulnerability
CVE-2020-3511: Cisco IOS and IOS XE Software ISDN Q.931 Denial of Service Vulnerability
A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient input validation when the ISDN Q.931 messages are processed. An attacker could exploit this vulnerability by sending a malicious ISDN Q.931 message to an affected device. A successful exploit could allow the attacker to cause the process to crash, resulting in a reload of the affected device. Cisco has released software updates that address this vulnerability. There are no
CVSS: 3.0
CWE: CWE-20, CWE-20
Bug IDs: CSCvr57760
GHSA
GHSA-p84p-mg49-xwvx: A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a rel
ghsa_unreviewed·2022-05-24
CVE-2020-3511 [HIGH] CWE-20 GHSA-p84p-mg49-xwvx: A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a rel
A vulnerability in the ISDN subsystem of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient input validation when the ISDN Q.931 messages are processed. An attacker could exploit this vulnerability by sending a malicious ISDN Q.931 message to an affected device. A successful exploit could allow the attacker to cause the process to crash, resulting in a reload of the affected device.
No detection rules found.
No public exploits indexed.
No writeups or analysis indexed.
2020-09-24
Published