Device reset or hang via AUX traffic
Published Mar 27, 2024 · Updated Aug 9, 2024
Denial of service in Cisco IOS XE Software AUX functions allows local users to reset or hang affected devices through reverse Telnet. The AUX-port path incorrectly handles specific ingress data while hardware flow control is enabled, causing the device to reset or stop responding. Exploitation requires authenticated access to reverse Telnet into an AUX port with flowcontrol hardware enabled and either no attached hardware or a modem that keeps flow control off.
Summary
What happened
Denial of service in Cisco IOS XE Software AUX functions allows local users to reset or hang affected devices through reverse Telnet. The AUX-port path incorrectly handles specific ingress data while hardware flow control is enabled, causing the device to reset or stop responding. Exploitation requires authenticated access to reverse Telnet into an AUX port with flowcontrol hardware enabled and either no attached hardware or a modem that keeps flow control off.
The record
- CVE
- CVE-2024-20309
- Published
- Mar 27, 2024
- Updated
- Aug 9, 2024
- Vendor
- ClamAV
- Product
- Cisco IOS XE Software
- Classifications
- CWE-828, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 27, 2024CVE publishedPublication date reported by the CVE source.
- Aug 9, 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=16.10.1
- Affected versionversion=16.10.1a
- Affected versionversion=16.10.1b
- Affected versionversion=16.10.1c
- Affected versionversion=16.10.1d
- Affected versionversion=16.10.1e
- Affected versionversion=16.10.1f
- Affected versionversion=16.10.1g
- Affected versionversion=16.10.1s
- Affected versionversion=16.10.2
- Affected versionversion=16.10.3
- Affected versionversion=16.1.1
- Affected versionversion=16.11.1
- Affected versionversion=16.11.1a
- Affected versionversion=16.11.1b
- Affected versionversion=16.11.1s
- Affected versionversion=16.11.2
- Affected versionversion=16.1.2
- Affected versionversion=16.12.1
- Affected versionversion=16.12.10
- Affected versionversion=16.12.10a
- Affected versionversion=16.12.1a
- Affected versionversion=16.12.1c
- Affected versionversion=16.12.1s
- Affected versionversion=16.12.1t
- Affected versionversion=16.12.1w
- Affected versionversion=16.12.1x
- Affected versionversion=16.12.1y
- Affected versionversion=16.12.1z1
- Affected versionversion=16.12.1z2
- Affected versionversion=16.12.2
- Affected versionversion=16.12.2a
- Affected versionversion=16.12.2s
- Affected versionversion=16.12.3
- Affected versionversion=16.12.3a
- Affected versionversion=16.12.3s
- Affected versionversion=16.12.4
- Affected versionversion=16.12.4a
- Affected versionversion=16.12.5
- Affected versionversion=16.12.5a
- Affected versionversion=16.12.5b
- Affected versionversion=16.12.6
- Affected versionversion=16.12.6a
- Affected versionversion=16.12.7
- Affected versionversion=16.12.8
- Affected versionversion=16.12.9
- Affected versionversion=16.1.3
- Affected versionversion=16.2.1
- Affected versionversion=16.2.2
- Affected versionversion=16.3.1
- Affected versionversion=16.3.10
- Affected versionversion=16.3.11
- Affected versionversion=16.3.1a
- Affected versionversion=16.3.2
- Affected versionversion=16.3.3
- Affected versionversion=16.3.4
- Affected versionversion=16.3.5
- Affected versionversion=16.3.5b
- Affected versionversion=16.3.6
- Affected versionversion=16.3.7
- Affected versionversion=16.3.8
- Affected versionversion=16.3.9
- Affected versionversion=16.4.1
- Affected versionversion=16.4.2
- Affected versionversion=16.4.3
- Affected versionversion=16.5.1
- Affected versionversion=16.5.1a
- Affected versionversion=16.5.1b
- Affected versionversion=16.5.2
- Affected versionversion=16.5.3
- Affected versionversion=16.6.1
- Affected versionversion=16.6.10
- Affected versionversion=16.6.2
- Affected versionversion=16.6.3
- Affected versionversion=16.6.4
- Affected versionversion=16.6.4a
- Affected versionversion=16.6.5
- Affected versionversion=16.6.5a
- Affected versionversion=16.6.6
- Affected versionversion=16.6.7
- Affected versionversion=16.6.8
- Affected versionversion=16.6.9
- Affected versionversion=16.7.1
- Affected versionversion=16.7.1a
- Affected versionversion=16.7.1b
- Affected versionversion=16.7.2
- Affected versionversion=16.7.3
- Affected versionversion=16.7.4
- Affected versionversion=16.8.1
- Affected versionversion=16.8.1a
- Affected versionversion=16.8.1b
- Affected versionversion=16.8.1c
- Affected versionversion=16.8.1d
- Affected versionversion=16.8.1e
- Affected versionversion=16.8.1s
- Affected versionversion=16.8.2
- Affected versionversion=16.8.3
- Affected versionversion=16.9.1
- Affected versionversion=16.9.1a
- Affected versionversion=16.9.1b
- Affected versionversion=16.9.1s
- Affected versionversion=16.9.2
- Affected versionversion=16.9.3
- Affected versionversion=16.9.3a
- Affected versionversion=16.9.4
- Affected versionversion=16.9.5
- Affected versionversion=16.9.5f
- Affected versionversion=16.9.6
- Affected versionversion=16.9.7
- Affected versionversion=16.9.8
- Affected versionversion=17.10.1
- Affected versionversion=17.10.1a
- Affected versionversion=17.10.1b
- Affected versionversion=17.1.1
- Affected versionversion=17.11.1
- Affected versionversion=17.11.1a
- Affected versionversion=17.11.99SW
- Affected versionversion=17.1.1a
- Affected versionversion=17.1.1s
- Affected versionversion=17.1.1t
- Affected versionversion=17.12.1
- Affected versionversion=17.12.1a
- Affected versionversion=17.12.1w
- Affected versionversion=17.12.2
- Affected versionversion=17.12.2a
- Affected versionversion=17.1.3
- Affected versionversion=17.2.1
- Affected versionversion=17.2.1a
- Affected versionversion=17.2.1r
- Affected versionversion=17.2.1v
- Affected versionversion=17.2.2
- Affected versionversion=17.2.3
- Affected versionversion=17.3.1
- Affected versionversion=17.3.1a
- Affected versionversion=17.3.1w
- Affected versionversion=17.3.1x
- Affected versionversion=17.3.1z
- Affected versionversion=17.3.2
- Affected versionversion=17.3.2a
- Affected versionversion=17.3.3
- Affected versionversion=17.3.4
- Affected versionversion=17.3.4a
- Affected versionversion=17.3.4b
- Affected versionversion=17.3.4c
- Affected versionversion=17.3.5
- Affected versionversion=17.3.5a
- Affected versionversion=17.3.5b
- Affected versionversion=17.3.6
- Affected versionversion=17.3.7
- Affected versionversion=17.3.8
- Affected versionversion=17.3.8a
- Affected versionversion=17.4.1
- Affected versionversion=17.4.1a
- Affected versionversion=17.4.1b
- Affected versionversion=17.4.2
- Affected versionversion=17.4.2a
- Affected versionversion=17.5.1
- Affected versionversion=17.5.1a
- Affected versionversion=17.6.1
- Affected versionversion=17.6.1a
- Affected versionversion=17.6.1w
- Affected versionversion=17.6.1x
- Affected versionversion=17.6.1y
- Affected versionversion=17.6.1z
- Affected versionversion=17.6.1z1
- Affected versionversion=17.6.2
- Affected versionversion=17.6.3
- Affected versionversion=17.6.3a
- Affected versionversion=17.6.4
- Affected versionversion=17.6.5
- Affected versionversion=17.6.5a
- Affected versionversion=17.6.6
- Affected versionversion=17.6.6a
- Affected versionversion=17.7.1
- Affected versionversion=17.7.1a
- Affected versionversion=17.7.1b
- Affected versionversion=17.7.2
- Affected versionversion=17.8.1
- Affected versionversion=17.8.1a
- Affected versionversion=17.9.1
- Affected versionversion=17.9.1a
- Affected versionversion=17.9.1w
- Affected versionversion=17.9.1x
- Affected versionversion=17.9.1x1
- Affected versionversion=17.9.1y
- Affected versionversion=17.9.1y1
- Affected versionversion=17.9.2
- Affected versionversion=17.9.2a
- Affected versionversion=17.9.3
- Affected versionversion=17.9.3a
- Affected versionversion=17.9.4
- Affected versionversion=17.9.4a
- Affected versionversion=3.10.0S
- Affected versionversion=3.10.10S
- Affected versionversion=3.10.1S
- Affected versionversion=3.10.1xbS
- Affected versionversion=3.10.2S
- Affected versionversion=3.10.2tS
- Affected versionversion=3.10.3S
- Affected versionversion=3.10.4S
- Affected versionversion=3.10.5S
- Affected versionversion=3.10.6S
- Affected versionversion=3.10.7S
- Affected versionversion=3.10.8aS
- Affected versionversion=3.10.8S
- Affected versionversion=3.10.9S
- Affected versionversion=3.11.0S
- Affected versionversion=3.11.1S
- Affected versionversion=3.11.2S
- Affected versionversion=3.11.3S
- Affected versionversion=3.11.4S
- Affected versionversion=3.12.0aS
- Affected versionversion=3.12.0S
- Affected versionversion=3.12.1S
- Affected versionversion=3.12.2S
- Affected versionversion=3.12.3S
- Affected versionversion=3.12.4S
- Affected versionversion=3.13.0aS
- Affected versionversion=3.13.0S
- Affected versionversion=3.13.10S
- Affected versionversion=3.13.1S
- Affected versionversion=3.13.2aS
- Affected versionversion=3.13.2S
- Affected versionversion=3.13.3S
- Affected versionversion=3.13.4S
- Affected versionversion=3.13.5aS
- Affected versionversion=3.13.5S
- Affected versionversion=3.13.6aS
- Affected versionversion=3.13.6S
- Affected versionversion=3.13.7aS
- Affected versionversion=3.13.7S
- Affected versionversion=3.13.8S
- Affected versionversion=3.13.9S
- Affected versionversion=3.14.0S
- Affected versionversion=3.14.1S
- Affected versionversion=3.14.2S
- Affected versionversion=3.14.3S
- Affected versionversion=3.14.4S
- Affected versionversion=3.15.0S
- Affected versionversion=3.15.1cS
- Affected versionversion=3.15.1S
- Affected versionversion=3.15.2S
- Affected versionversion=3.15.3S
- Affected versionversion=3.15.4S
- Affected versionversion=3.16.0cS
- Affected versionversion=3.16.0S
- Affected versionversion=3.16.10S
- Affected versionversion=3.16.1aS
- Affected versionversion=3.16.1S
- Affected versionversion=3.16.2aS
- Affected versionversion=3.16.2bS
- Affected versionversion=3.16.2S
- Affected versionversion=3.16.3aS
- Affected versionversion=3.16.3S
- Affected versionversion=3.16.4aS
- Affected versionversion=3.16.4bS
- Affected versionversion=3.16.4dS
- Affected versionversion=3.16.4S
- Affected versionversion=3.16.5S
- Affected versionversion=3.16.6bS
- Affected versionversion=3.16.6S
- Affected versionversion=3.16.7aS
- Affected versionversion=3.16.7bS
- Affected versionversion=3.16.7S
- Affected versionversion=3.16.8S
- Affected versionversion=3.16.9S
- Affected versionversion=3.17.0S
- Affected versionversion=3.17.1aS
- Affected versionversion=3.17.1S
- Affected versionversion=3.17.2S
- Affected versionversion=3.17.3S
- Affected versionversion=3.17.4S
- Affected versionversion=3.18.0aS
- Affected versionversion=3.18.0S
- Affected versionversion=3.18.0SP
- Affected versionversion=3.18.1aSP
- Affected versionversion=3.18.1bSP
- Affected versionversion=3.18.1cSP
- Affected versionversion=3.18.1S
- Affected versionversion=3.18.1SP
- Affected versionversion=3.18.2aSP
- Affected versionversion=3.18.2S
- Affected versionversion=3.18.2SP
- Affected versionversion=3.18.3aSP
- Affected versionversion=3.18.3bSP
- Affected versionversion=3.18.3S
- Affected versionversion=3.18.3SP
- Affected versionversion=3.18.4S
- Affected versionversion=3.18.4SP
- Affected versionversion=3.18.5SP
- Affected versionversion=3.18.6SP
- Affected versionversion=3.18.7SP
- Affected versionversion=3.18.8aSP
- Affected versionversion=3.18.9SP
- Affected versionversion=3.2.0SE
- Affected versionversion=3.2.1SE
- Affected versionversion=3.2.2SE
- Affected versionversion=3.2.3SE
- Affected versionversion=3.3.0SE
- Affected versionversion=3.3.0SQ
- Affected versionversion=3.3.1SE
- Affected versionversion=3.3.1SQ
- Affected versionversion=3.3.2SE
- Affected versionversion=3.3.3SE
- Affected versionversion=3.3.4SE
- Affected versionversion=3.3.5SE
- Affected versionversion=3.4.0SQ
- Affected versionversion=3.4.1SQ
- Affected versionversion=3.5.0SQ
- Affected versionversion=3.5.1SQ
- Affected versionversion=3.5.2SQ
- Affected versionversion=3.5.3SQ
- Affected versionversion=3.5.4SQ
- Affected versionversion=3.5.5SQ
- Affected versionversion=3.5.6SQ
- Affected versionversion=3.5.7SQ
- Affected versionversion=3.5.8SQ
- Affected versionversion=3.6.10E
- Affected versionversion=3.6.2aE
- Affected versionversion=3.6.2E
- Affected versionversion=3.6.5bE
- Affected versionversion=3.6.7bE
- Affected versionversion=3.6.9E
- Affected versionversion=3.7.0bS
- Affected versionversion=3.7.0S
- Affected versionversion=3.7.1aS
- Affected versionversion=3.7.1S
- Affected versionversion=3.7.2S
- Affected versionversion=3.7.2tS
- Affected versionversion=3.7.3S
- Affected versionversion=3.7.4aS
- Affected versionversion=3.7.4S
- Affected versionversion=3.7.5S
- Affected versionversion=3.7.6S
- Affected versionversion=3.7.7S
- Affected versionversion=3.8.0S
- Affected versionversion=3.8.1S
- Affected versionversion=3.8.2S
- Affected versionversion=3.9.0aS
- Affected versionversion=3.9.0S
- Affected versionversion=3.9.1aS
- Affected versionversion=3.9.1S
- Affected versionversion=3.9.2S
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
See the directory against your own environment.
Your stack
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