h300s firmware vulnerabilities and fixes

Q: How do I fix h300s firmware vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Q: Is h300s firmware being exploited right now?

Yes: 1 h300s firmware CVE is on the CISA Known Exploited Vulnerabilities list, so patch it first.

Q: Which h300s firmware CVE should I patch first?

CVE-2022-0995 currently ranks highest (86/100): Linux Kernel Out-of-Bounds Write Vulnerability.

Recent CVEs affecting h300s firmware, with upgrade or downgrade steps. 9 tracked.

h300s firmware has 9 tracked vulnerabilities, 0 critical and 1 exploited in the wild (CISA KEV). A fixed release or vendor patch exists for 9. Most recent: 2023-05-26. Highest priority: CVE-2022-0995 (score 86/100).

CVE-2023-27534 HIGH 8.8 UPGRADE MITIGATE A path traversal vulnerability exists in curl <8.0.0 SFTP implementation causes the tilde (~) character to be
CVE-2023-28319 HIGH 7.5 UPGRADE UPGRADE A use after free vulnerability exists in curl <v8.1.0 in the way libcurl offers a feature to verify an SSH ser
CVE-2023-27536 MEDIUM 5.9 UPGRADE MITIGATE An authentication bypass vulnerability exists libcurl <8.0.0 in the connection reuse feature which can reuse p
CVE-2023-28321 MEDIUM 5.9 UPGRADE MITIGATE An improper certificate validation vulnerability exists in curl <v8.1.0 in the way it supports matching of wil
CVE-2023-23916 MEDIUM 6.5 UPGRADE MITIGATE An allocation of resources without limits or throttling vulnerability exists in curl <v7.88.0 based on the "ch
CVE-2023-28320 MEDIUM 5.9 UPGRADE UPGRADE A denial of service vulnerability exists in curl <v8.1.0 in the way libcurl provides several different backend
CVE-2023-27537 MEDIUM 5.9 DOWNGRADE MITIGATE A double free vulnerability exists in libcurl <8.0.0 when sharing HSTS data between separate "handles"
CVE-2023-28322 LOW 3.7 UPGRADE MITIGATE An information disclosure vulnerability exists in curl <v8.1.0 when doing HTTP(S) transfers, libcurl might err
CVE-2022-0995 HIGH 7.8 EXPLOITED UPGRADE MITIGATE Linux Kernel Out-of-Bounds Write Vulnerability

FAQ

How do I fix h300s firmware vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is h300s firmware being exploited right now?

Yes: 1 h300s firmware CVE is on the CISA Known Exploited Vulnerabilities list, so patch it first.

Which h300s firmware CVE should I patch first?

CVE-2022-0995 currently ranks highest (86/100): Linux Kernel Out-of-Bounds Write Vulnerability.

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