{"id":2204,"date":"2018-01-12T20:46:32","date_gmt":"2018-01-12T19:46:32","guid":{"rendered":"http:\/\/www.fabionline.net\/aaaaaaa\/?p=2204"},"modified":"2025-03-31T20:44:14","modified_gmt":"2025-03-31T18:44:14","slug":"spectre-meltdown-checker-linux","status":"publish","type":"post","link":"https:\/\/www.fabionline.net\/blog\/linux\/spectre-meltdown-checker-linux\/","title":{"rendered":"Spectre – Meltdown checker (linux)"},"content":{"rendered":"

I have just tried on my not so new pc this interesting script:\u00a0Specter-Meltdown-Checker<\/a> , as specified also in instructions, it is not a bible, but surely it is something could give you very useful informations – this script give you the possibility to check your pc vulnerability to \u00a0Spectre (2 variants) and Meltdown.
\nPc features:<\/strong>
\nIntel I5-3470 (ivy bridge) 3.20 GHz
\nKernel: 4.14.13-1-ARCH
\n8 GB ram
\nArch Linux
\nNvidia Geforce Gt-630
\nfull Hardware details are here<\/a>\u00a0, (i have used lshw<\/span> command)
\ni downloaded \u00a0and extracted .zip file ,
\nthen i applied execute permission to .sh file through chmod +x
\n\"\"
\nThen\u00a0i have executed the script (Is recommended to execute script being root)\"\"
\nafter password insertion, the script can run:\"\"below results:
\nSpectre Variant 1 (CVE-2017-5753 bounds check bypass)<\/strong>\"\"
\nfinal result is
\n\"\"\u00a0\"\"
\nSpectre Variant 2 (CVE-2017-5715 branch target\u00a0injection)<\/span>
\n<\/strong><\/span><\/strong>as you can see, script try to check if in my machine are some mitigations\u00a0<\/span>
\n\"\"
\n<\/strong><\/span><\/strong>final result is
\n<\/span>\u00a0<\/span>\"\"\u00a0\"\"<\/span><\/strong>
\nMeltdown (CVE-2017-5754 rogue data cache load)
\n<\/span><\/span><\/strong>In that case result was positive, thanks Kernel \ud83d\ude42
\n\"\"
\n<\/span><\/span>
\n\u00a0<\/strong>Just for curiosity i have also executed script without root permission (i know, have no sense but i wanted see differences)\u00a0below you can see what happens:
\nObviously script will warn you, then will start
\n\"\"
\n\"\"
\n\"\"
\nSpectre (Variant 1)<\/span>
\n<\/span><\/strong>only differences are\u00a0<\/strong>B^B^B^checking LFENCE while outcome (UNKNOWN) and especially final result (VULNERABLE) are exactly the same you can see executing script as root<\/span>
\n<\/span><\/strong>\"\"
\nSpectre (Variant 2)<\/span>
\n<\/span><\/strong>during mitigation 1 check there is a read permission error (predictable considering we don’t have root permission) on\u00a0\/dev\/cpu\/0\/msr , so script can’t check cpu microcode<\/span>
\n\"\"
\n<\/span><\/strong>Rest of other checks (IBRS kernel support,kernel space,user space etc) were identical as reported above , included final result (VULNERABLE)<\/span>
\nMeltdown
\n<\/span><\/span><\/strong>Identical result as reported above (NOT VULNERABLE)<\/p>","protected":false},"excerpt":{"rendered":"

I have just tried on my not so new pc this interesting script:\u00a0Specter-Meltdown-Checker , as specified also in instructions, it is not a bible, but surely it is something could give you very useful informations – this script give you … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_links_to":"","_links_to_target":""},"categories":[5,8],"tags":[],"_links":{"self":[{"href":"https:\/\/www.fabionline.net\/blog\/wp-json\/wp\/v2\/posts\/2204"}],"collection":[{"href":"https:\/\/www.fabionline.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fabionline.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fabionline.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fabionline.net\/blog\/wp-json\/wp\/v2\/comments?post=2204"}],"version-history":[{"count":1,"href":"https:\/\/www.fabionline.net\/blog\/wp-json\/wp\/v2\/posts\/2204\/revisions"}],"predecessor-version":[{"id":2611,"href":"https:\/\/www.fabionline.net\/blog\/wp-json\/wp\/v2\/posts\/2204\/revisions\/2611"}],"wp:attachment":[{"href":"https:\/\/www.fabionline.net\/blog\/wp-json\/wp\/v2\/media?parent=2204"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fabionline.net\/blog\/wp-json\/wp\/v2\/categories?post=2204"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fabionline.net\/blog\/wp-json\/wp\/v2\/tags?post=2204"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}