{"document":{"category":"csaf_vex","csaf_version":"2.1","notes":[{"category":"summary","text":"Palo Alto Networks PSIRT provided VEX document. This document is autogenerated.","title":"Informational Bulletin: Impact of OpenSSH regreSSHion Vulnerability"}],"publisher":{"category":"vendor","name":"Palo Alto Networks","namespace":"https://security.paloaltonetworks.com"},"title":"Palo Alto Networks PSIRT provided VEX document: CVE-2024-6387","distribution":{"text":"Copyright © 2024 Palo Alto Networks. All rights reserved.","tlp":{"label":"CLEAR","url":"https://www.first.org/tlp/"}},"tracking":{"current_release_date":"2026-04-11T00:51:46.417Z","generator":{"date":"2026-04-11T00:51:46.417Z","engine":{"name":"vulnogram","version":"0.1.0-rc1"}},"id":"CVE-2024-6387","initial_release_date":"2024-07-01T19:30:00.000Z","revision_history":[{"number":"1","date":"2024-07-01T12:30:00.000Z","summary":"Initial publication"},{"number":"2","date":"2024-07-02T23:30:00.000Z","summary":"Added link to Unit 42 threat brief"}],"status":"final","version":"1"}},"product_tree":{"branches":[{"name":"Palo Alto Networks","category":"vendor","branches":[{"name":"PAN-OS","category":"product_name","branches":[{"category":"product_version","name":"PAN-OS All","product":{"name":"Palo Alto Networks PAN-OS","product_id":"PANW-PAN-OS-1"}},{"category":"product_version","name":"PAN-OS None","product":{"name":"Palo Alto Networks PAN-OS","product_id":"PANW-PAN-OS-2"}}]},{"name":"Prisma Access","category":"product_name","branches":[{"category":"product_version","name":"Prisma Access All","product":{"name":"Palo Alto Networks Prisma Access","product_id":"PANW-Prisma-Access-1"}},{"category":"product_version","name":"Prisma Access None","product":{"name":"Palo Alto Networks Prisma Access","product_id":"PANW-Prisma-Access-2"}}]},{"name":"Cloud NGFW","category":"product_name","branches":[{"category":"product_version","name":"Cloud NGFW All","product":{"name":"Palo Alto Networks Cloud NGFW","product_id":"PANW-Cloud-NGFW-1"}},{"category":"product_version","name":"Cloud NGFW None","product":{"name":"Palo Alto Networks Cloud NGFW","product_id":"PANW-Cloud-NGFW-2"}}]}]}]},"vulnerabilities":[{"cve":"CVE-2024-6387","product_status":{"known_affected":["PANW-PAN-OS-2","PANW-Prisma-Access-2","PANW-Cloud-NGFW-2"],"known_not_affected":["PANW-PAN-OS-1","PANW-Prisma-Access-1","PANW-Cloud-NGFW-1"]},"notes":[{"category":"description","text":"A signal handler race condition was found in OpenSSH's server (sshd), where a client does not authenticate within LoginGraceTime seconds (120 by default, 600 in old OpenSSH versions), then sshd's SIGALRM handler is called asynchronously. However, this signal handler calls various functions that are not async-signal-safe, for example, syslog()."}],"references":[{"category":"external","summary":"NVD - CVE-2024-6387","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-6387"},{"category":"self","summary":"Palo Alto Networks Security Advisory CVE-2024-6387","url":"https://security.paloaltonetworks.com/CVE-2024-6387"}],"threats":[{"category":"impact","description":"A signal handler race condition was found in OpenSSH's server (sshd), where a client does not authenticate within LoginGraceTime seconds (120 by default, 600 in old OpenSSH versions), then sshd's SIGALRM handler is called asynchronously. However, this signal handler calls various functions that are not async-signal-safe, for example, syslog()."}]}]}