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Convert indexed Sigma rules into analyst-ready detections.
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Newest: 2.0.2
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Active Rule
Potential CVE-2023-2283 Exploitation
Target Profile
Splunk
Splunk SPL & tstats data model queries
Format Mode
Default
Plain SPL queries
Conversion Output
Potential CVE-2023-2283 Exploitation
Using Splunk · Default · sigma-cli 2.0.2
Translation controls
Adjust the rule on the left, then regenerate when you want a fresh backend-native query.
BackendSplunkFormatDefaultVersion2.0.2
title: Potential CVE-2023-2283 Exploitation
id: 8b244735-5833-4517-a45b-28d8c63924c0
status: test
description: Detects potential exploitation attempt of CVE-2023-2283 an authentication bypass in libSSH. The exploitation method causes an error message stating that keys for curve25519 could not be generated. It is an error message that is a sign of an exploitation attempt. It is not a sign of a successful exploitation.
references:
- https://twitter.com/kevin_backhouse/status/1666459308941357056?s=20
- https://git.libssh.org/projects/libssh.git/tree/src/curve25519.c#n420
- https://nvd.nist.gov/vuln/detail/CVE-2023-2283
- https://www.blumira.com/cve-2023-2283/
- https://github.com/github/securitylab/tree/1786eaae7f90d87ce633c46bbaa0691d2f9bf449/SecurityExploits/libssh/pubkey-auth-bypass-CVE-2023-2283
author: Florian Roth (Nextron Systems)
date: 2023-06-09
tags:
- attack.initial-access
- attack.t1190
- cve.2023-2283
- detection.emerging-threats
logsource:
product: linux
service: sshd
detection:
keywords:
- 'Failed to generate curve25519 keys'
condition: keywords
falsepositives:
- Errors with the initialization or generation of the X25519 elliptic curve keys may generate the same error message
level: medium
CLI command
Copy the exact command to reproduce this translation locally.
sigma convert --without-pipeline -t splunk -f default rules-emerging-threats/2023/Exploits/CVE-2023-2283/lnx_sshd_exploit_cve_2023_2283_libssh_authentication_bypass.yml