CVE-2020-3118

Summary

CVECVE-2020-3118
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2020-02-05 18:15:00 UTC
Updated2022-12-23 16:59:00 UTC
DescriptionA vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability is due to improper validation of string input from certain fields in Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges on an affected device. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).

Risk And Classification

EPSS: 0.002560000 probability, percentile 0.489490000 (date 2026-04-01)

CISA KEV: Listed on 2021-11-03; due 2022-05-03; ransomware use Unknown

Problem Types: CWE-787

CISA Known Exploited Vulnerability

VendorCisco
ProductIOS XR
NameCisco IOS XR Software Discovery Protocol Format String Vulnerability
Required ActionApply updates per vendor instructions.
Noteshttps://nvd.nist.gov/vuln/detail/CVE-2020-3118

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Cisco Asr 9000 - All All All
Hardware Cisco Asr 9000v - All All All
Hardware Cisco Asr 9000v - All All All
Hardware Cisco Asr 9001 - All All All
Hardware Cisco Asr 9001 - All All All
Hardware Cisco Asr 9006 - All All All
Hardware Cisco Asr 9006 - All All All
Hardware Cisco Asr 9010 - All All All
Hardware Cisco Asr 9010 - All All All
Hardware Cisco Asr 9901 - All All All
Hardware Cisco Asr 9901 - All All All
Hardware Cisco Asr 9903 - All All All
Hardware Cisco Asr 9904 - All All All
Hardware Cisco Asr 9904 - All All All
Hardware Cisco Asr 9906 - All All All
Hardware Cisco Asr 9906 - All All All
Hardware Cisco Asr 9910 - All All All
Hardware Cisco Asr 9910 - All All All
Hardware Cisco Asr 9912 - All All All
Hardware Cisco Asr 9912 - All All All
Hardware Cisco Asr 9920 - All All All
Hardware Cisco Asr 9922 - All All All
Hardware Cisco Asr 9922 - All All All
Hardware Cisco Crs - All All All
Hardware Cisco Crs - All All All
Hardware Cisco Crs-x - All All All
Operating System Cisco Ios Xr All All All All
Operating System Cisco Ios Xr 5.2.5 All All All
Operating System Cisco Ios Xr 6.4.2 All All All
Operating System Cisco Ios Xr 6.5.2 All All All
Operating System Cisco Ios Xr 6.5.3 All All All
Operating System Cisco Ios Xr 6.6.25 All All All
Operating System Cisco Ios Xr 7.0.1 All All All
Operating System Cisco Ios Xr All All All All
Operating System Cisco Ios Xr 5.2.5 All All All
Operating System Cisco Ios Xr 6.5.2 All All All
Operating System Cisco Ios Xr 6.5.3 All All All
Operating System Cisco Ios Xr 6.6.25 All All All
Operating System Cisco Ios Xr 7.0.1 All All All
Hardware Cisco Ncs 1001 - All All All
Hardware Cisco Ncs 1001 - All All All
Hardware Cisco Ncs 1002 - All All All
Hardware Cisco Ncs 1002 - All All All
Hardware Cisco Ncs 1004 - All All All
Hardware Cisco Ncs 1004 - All All All
Hardware Cisco Ncs 5001 - All All All
Hardware Cisco Ncs 5001 - All All All
Hardware Cisco Ncs 5002 - All All All
Hardware Cisco Ncs 5002 - All All All
Hardware Cisco Ncs 5011 - All All All
Hardware Cisco Ncs 5011 - All All All
Hardware Cisco Ncs 520 - All All All
Hardware Cisco Ncs 520 - All All All
Hardware Cisco Ncs 540 - All All All
Hardware Cisco Ncs 540 - All All All
Hardware Cisco Ncs 540-12z20g-sys-a - All All All
Hardware Cisco Ncs 540-12z20g-sys-a - All All All
Hardware Cisco Ncs 540-12z20g-sys-d - All All All
Hardware Cisco Ncs 540-12z20g-sys-d - All All All
Hardware Cisco Ncs 540-24z8q2c-sys - All All All
Hardware Cisco Ncs 540-24z8q2c-sys - All All All
Hardware Cisco Ncs 540-28z4c-sys-a - All All All
Hardware Cisco Ncs 540-28z4c-sys-a - All All All
Hardware Cisco Ncs 540-28z4c-sys-d - All All All
Hardware Cisco Ncs 540-28z4c-sys-d - All All All
Hardware Cisco Ncs 540-acc-sys - All All All
Hardware Cisco Ncs 540-acc-sys - All All All
Hardware Cisco Ncs 540l - All All All
Hardware Cisco Ncs 540l - All All All
Hardware Cisco Ncs 540x-12z16g-sys-a - All All All
Hardware Cisco Ncs 540x-12z16g-sys-a - All All All
Hardware Cisco Ncs 540x-12z16g-sys-d - All All All
Hardware Cisco Ncs 540x-12z16g-sys-d - All All All
Hardware Cisco Ncs 540x-16z4g8q2c-a - All All All
Hardware Cisco Ncs 540x-16z4g8q2c-a - All All All
Hardware Cisco Ncs 540x-16z4g8q2c-d - All All All
Hardware Cisco Ncs 540x-16z4g8q2c-d - All All All
Hardware Cisco Ncs 540x-acc-sys - All All All
Hardware Cisco Ncs 540x-acc-sys - All All All
Hardware Cisco Ncs 5501 - All All All
Hardware Cisco Ncs 5501 - All All All
Hardware Cisco Ncs 5501-se - All All All
Hardware Cisco Ncs 5501-se - All All All
Hardware Cisco Ncs 5502 - All All All
Hardware Cisco Ncs 5502 - All All All
Hardware Cisco Ncs 5502-se - All All All
Hardware Cisco Ncs 5502-se - All All All
Hardware Cisco Ncs 5508 - All All All
Hardware Cisco Ncs 5508 - All All All
Hardware Cisco Ncs 5516 - All All All
Hardware Cisco Ncs 5516 - All All All
Hardware Cisco Ncs 560 - All All All
Hardware Cisco Ncs 560 - All All All
Hardware Cisco Ncs 6000 - All All All
Hardware Cisco Ncs 6000 - All All All
Hardware Cisco Ncs 6008 - All All All
Hardware Cisco Xrv 9000 - All All All
Hardware Cisco Xrv 9000 - All All All

References

ReferenceSourceLinkTags
Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability CISCO tools.cisco.com Vendor Advisory
Cisco Discovery Protocol (CDP) Remote Device Takeover ≈ Packet Storm MISC packetstormsecurity.com Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev
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