Traffic loss via malformed Ethernet frame handling
Published Mar 13, 2024 · Updated Aug 1, 2024
Improper input validation in Cisco IOS XR Software allows physically proximate attackers to interrupt traffic by resetting a network processor. Layer 2 Ethernet services incorrectly handle specific Ethernet frames passed through an affected device, resetting the ingress interface network processor. The device must run an affected IOS XR 64-bit release with an affected Layer 2 transport configuration; repeated processor resets reset the line card.
Summary
What happened
Improper input validation in Cisco IOS XR Software allows physically proximate attackers to interrupt traffic by resetting a network processor. Layer 2 Ethernet services incorrectly handle specific Ethernet frames passed through an affected device, resetting the ingress interface network processor. The device must run an affected IOS XR 64-bit release with an affected Layer 2 transport configuration; repeated processor resets reset the line card.
The record
- CVE
- CVE-2024-20318
- Published
- Mar 13, 2024
- Updated
- Aug 1, 2024
- Vendor
- ClamAV
- Product
- Cisco IOS XR Software
- Classifications
- CWE-20, T1499.004
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 13, 2024CVE publishedPublication date reported by the CVE source.
- Aug 1, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=6.5.2
- Affected versionversion=6.5.3
- Affected versionversion=6.6.2
- Affected versionversion=6.6.25
- Affected versionversion=6.6.3
- Affected versionversion=6.7.1
- Affected versionversion=6.7.2
- Affected versionversion=6.7.3
- Affected versionversion=6.8.1
- Affected versionversion=6.8.2
- Affected versionversion=6.9.1
- Affected versionversion=6.9.2
- Affected versionversion=7.0.1
- Affected versionversion=7.0.2
- Affected versionversion=7.1.1
- Affected versionversion=7.1.15
- Affected versionversion=7.1.2
- Affected versionversion=7.1.3
- Affected versionversion=7.3.1
- Affected versionversion=7.3.2
- Affected versionversion=7.3.3
- Affected versionversion=7.3.5
- Affected versionversion=7.4.1
- Affected versionversion=7.4.2
- Affected versionversion=7.5.1
- Affected versionversion=7.5.2
- Affected versionversion=7.5.3
- Affected versionversion=7.5.4
- Affected versionversion=7.5.5
- Affected versionversion=7.6.1
- Affected versionversion=7.6.2
- Affected versionversion=7.7.1
- Affected versionversion=7.7.2
- Affected versionversion=7.8.1
- Affected versionversion=7.8.2
- Affected versionversion=7.9.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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