CVE-2020-3118
published 2020-02-05CVE-2020-3118: A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary…
PriorityP185high8.8CVSS 3.1
AVAACLPRNUINSUCHIHAH
KEVITW
CISA Known Exploited Vulnerabilitydue 2022-05-03
Exploited in the wild
EPSS
11.68%
95.6th percentile
A 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).
Affected
9 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_ios_xr_software | >= unspecified < 6.6.3 | 6.6.3 |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | — | — |
| cisco | ios_xr | >= 6.6.0 < 6.6.12 | 6.6.12 |
| cisco | ios_xr | >= 7.0.0 < 7.0.2 | 7.0.2 |
Detection & IOCsextracted from sources · hover to see the quote
- →Exploit requires the attacker to be Layer 2 adjacent (same broadcast domain) — monitor for unexpected or malformed Cisco Discovery Protocol (CDP) packets on network segments containing IOS XR devices ↗
- →Trigger mechanism is a malicious CDP packet with improper string input in certain fields — inspect CDP message fields for format string specifiers (e.g., %n, %x, %s) or abnormally long string values that could cause a stack overflow ↗
- →Successful exploitation results in a stack overflow leading to arbitrary code execution with administrative privileges or device reload — alert on unexpected IOS XR process crashes or spontaneous reloads on CDP-enabled interfaces ↗
- →Track Cisco bug IDs CSCvr09190 and CSCvr78185 in device logs and TAC cases as indicators of affected software versions ↗
- ·There are no workarounds available for this vulnerability — the only mitigation is applying vendor-supplied software updates ↗
- ·Exploitation is limited to unauthenticated attackers who are Layer 2 adjacent; the attack surface is constrained to broadcast domains containing affected Cisco IOS XR devices with CDP enabled ↗
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv3.08.8HIGHCVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.08.3HIGHAV:A/AC:L/Au:N/C:C/I:C/A:C
vulncheck8.8HIGH
cisa8.8HIGH
vendor_cisco8.8HIGH
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GHSA
GHSA-f7vj-6cqm-9xgc: A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute
ghsa_unreviewed·2022-05-24
CVE-2020-3118 [HIGH] CWE-134 GHSA-f7vj-6cqm-9xgc: A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute
A 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 adjac
VulnCheck
Cisco IOS XR Software Discovery Protocol Format String Vulnerability
vulncheck·2020·CVSS 8.8
CVE-2020-3118 [HIGH] CWE-134 Cisco IOS XR Software Discovery Protocol Format String Vulnerability
Cisco IOS XR Software Discovery Protocol Format String Vulnerability
Cisco IOS XR improperly validates string input from certain fields in Cisco Discovery Protocol messages. Exploitation could allow an unauthenticated, adjacent attacker to execute code with administrative privileges or cause a reload on an affected device.
Affected: Cisco IOS XR
Required Action: Apply updates per vendor instructions.
Exploitation References: https://cisa.gov/news-events/cybersecurity-advisories/aa20-275a; https://media.defense.gov/2020/Oct/20/2002519884/-1/-1/0/CSA_CHINESE_EXPLOIT_VULNERABILITIES_UOO179811.PDF; https://us-cert.cisa.gov/ncas/alerts/aa20-275a; https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
Remediation Due: 2022-05-03
CISA
Cisco IOS XR Software Discovery Protocol Format String Vulnerability
cisa·2021-11-03·CVSS 8.8
CVE-2020-3118 [HIGH] CWE-134 Cisco IOS XR Software Discovery Protocol Format String Vulnerability
Vulnerability: Cisco IOS XR Software Discovery Protocol Format String Vulnerability
Affected: Cisco IOS XR
Cisco IOS XR improperly validates string input from certain fields in Cisco Discovery Protocol messages. Exploitation could allow an unauthenticated, adjacent attacker to execute code with administrative privileges or cause a reload on an affected device.
Required Action: Apply updates per vendor instructions.
Notes: https://nvd.nist.gov/vuln/detail/CVE-2020-3118
Remediation Due Date: 2022-05-03
Cisco
Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability
vendor_cisco·2020-02-05·CVSS 8.8
CVE-2020-3118 [HIGH] CWE-134 Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability
Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability
A 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.
Note: Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an
Cisco
Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability
vendor_cisco·CVSS 3.0
CVE-2020-3118 Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability
CVE-2020-3118: Cisco IOS XR Software Cisco Discovery Protocol Format String Vulnerability
A 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. Note: Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulne
No detection rules found.
No public exploits indexed.
Trendmicro
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
blogs_trendmicro·2021-04-28
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Cyberbedrohungen
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As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Exploiting known vulnerabilities to successfully compromise an organization has long been a common tactic used by malicious actors. Whether Heartbleed, EternalBlue, or most recently Zerologon, threat actors take advantage of newly disclosed vulnerabilities in their attacks. But even with thousands of new vulnerabili
Trendmicro
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
blogs_trendmicro·2021-04-28
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Cyber Threats
## How Trend Micro Helps Manage Exploited Vulnerabilities
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Read how Trend Micro protects customers from vulnerability exploits by blocking them as early as possible.
By: Jon Clay 2021/04/28 Read time: ( words)
Save to Folio
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Exploiting known vulnerabilities to successfully compromise an organization has long been a common tactic used by malicious actors. Whether Heartbleed, EternalBlue, or most recently Zerologon, threat actors take advantage of newly disclosed vulnerabilities in their attacks. But even with thousands of new vulnerabilities
Trendmicro
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Minacce cyber
## How Trend Micro Helps Manage Exploited Vulnerabilities
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Read how Trend Micro protects customers from vulnerability exploits by blocking them as early as possible.
By: Jon Clay Apr 28, 2021 Read time: ( words)
Save to Folio
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Exploiting known vulnerabilities to successfully compromise an organization has long been a common tactic used by malicious actors. Whether Heartbleed, EternalBlue, or most recently Zerologon, threat actors take advantage of newly disclosed vulnerabilities in their attacks. But even with thousands of new vulnerabilitie
Trendmicro
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Ciberamenazas
## How Trend Micro Helps Manage Exploited Vulnerabilities
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Read how Trend Micro protects customers from vulnerability exploits by blocking them as early as possible.
By: Jon Clay Apr 28, 2021 Read time: ( words)
Save to Folio
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Exploiting known vulnerabilities to successfully compromise an organization has long been a common tactic used by malicious actors. Whether Heartbleed, EternalBlue, or most recently Zerologon, threat actors take advantage of newly disclosed vulnerabilities in their attacks. But even with thousands of new vulnerabilitie
Trendmicro
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
blogs_trendmicro·2021-04-28
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Cyber Threats
## How Trend Micro Helps Manage Exploited Vulnerabilities
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Read how Trend Micro protects customers from vulnerability exploits by blocking them as early as possible.
By: Jon Clay Apr 28, 2021 Read time: ( words)
Save to Folio
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Exploiting known vulnerabilities to successfully compromise an organization has long been a common tactic used by malicious actors. Whether Heartbleed, EternalBlue, or most recently Zerologon, threat actors take advantage of newly disclosed vulnerabilities in their attacks. But even with thousands of new vulnerabilitie
Trendmicro
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
blogs_trendmicro·2021-04-28
Manage Zero Day Exploits (ZDI) with Trend Micro Solutions
Cyber Threats
# How Trend Micro Helps Manage Exploited Vulnerabilities
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Read how Trend Micro protects customers from vulnerability exploits by blocking them as early as possible.
By: Jon Clay
2021/04/28
Read time: ( words)
Save to Folio
Photo credit: pxhere
As technological innovations evolve, protecting companies from cyber threats tomorrow secures their businesses today. Exploiting known vulnerabilities to successfully compromise an organization has long been a common tactic used by malicious actors. Whether Heartbleed, EternalBlue, or most recently Zerologon, threat actors take advantage of newly disclosed vulnerabilities in their attacks. But even with thousands o
Checkpoint
26th October – Threat Intelligence Bulletin
blogs_checkpoint·2020-10-26
CVE-2020-3118 26th October – Threat Intelligence Bulletin
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#### Table of Contents
- Detect 25 Publicly Known Vulnerabilities using VMDR
Update November 25, 2020: The UK National Cyber Security Centre alerts that APT nation-state groups and cybercriminals are exploiting MobileIron RCE vulnerability (CVE-2020-15505).
Original post: On October 20, 2020, the United States National Security Agency (NSA) released a cybersecurity advisory on Chinese state-sponsored malicious cyber activity. The NSA alert provided a list of 25 publicly known vulnerabilities that are known to be recently leveraged by cyber actors for various hacking operations.
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## Table of Contents
Detect 25 Publicly Known Vulnerabilities using VMDR
Update November 25, 2020 : The UK National Cyber Security Centre alerts that APT nation-state groups and cybercriminals are exploiting MobileIron RCE vulnerability (CVE-2020-15505).
Original post : On October 20, 2020, the United States National Security Agency (NSA) released a cybersecurity advisory on Chinese state-sponsored malicious cyber activity. The NSA alert provided a list of 25 publicly known vulnerabilities that are known to be recently leveraged by cyber actors for various hacking operations.
“Since these techniques include exploitation of publicly known vulnerabilities, it is critical that network defenders prioritize patching and mitigation efforts,” said the NSA advisory. It also recommended “critic
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blogs_tenable·2020-02-05
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Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
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## Business needs
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http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.htmlhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-iosxr-cdp-rcehttp://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.htmlhttps://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-iosxr-cdp-rcehttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3118
2020-02-05
Published
2021-11-03
Added to CISA KEV
Exploited in the wild