{"id":1161,"date":"2015-01-28T12:39:05","date_gmt":"2015-01-28T01:39:05","guid":{"rendered":"http:\/\/howden.net.au\/thowden\/?p=1161"},"modified":"2015-01-28T12:39:05","modified_gmt":"2015-01-28T01:39:05","slug":"cve-2015-0235-ghost-glibc-debian-wheezy-centos-5-11-6-6-gethost-security-testing","status":"publish","type":"post","link":"https:\/\/howden.net.au\/thowden\/2015\/01\/cve-2015-0235-ghost-glibc-debian-wheezy-centos-5-11-6-6-gethost-security-testing\/","title":{"rendered":"CVE-2015-0235 Ghost glibc Debian Wheezy CentOS 5.11 6.6 gethost security Testing"},"content":{"rendered":"

Thanks to https:\/\/gist.github.com\/koelling\/ef9b2b9d0be6d6dbab63<\/a> for a script to test for this vulnerability.<\/p>\n

Update: Another option for Debian, at least, is to check ldd –version<\/p>\n

[code]ldd –version
\nldd (Debian EGLIBC 2.13-38+deb7u7) 2.13[\/code]<\/p>\n

Check the last digit in the minor release number, ‘deb7u7’ is good, ‘deb7u6’ or less are vulnerable.<\/p>\n

First download the file:<\/p>\n

[code]wget https:\/\/gist.githubusercontent.com\/koelling\/ef9b2b9d0be6d6dbab63\/raw\/de1730049198c64eaf8f8ab015a3c8b23b63fd34\/gistfile1.c[\/code]<\/p>\n

If you have a certificate error you may want to use the wget –no-check-certificate option<\/p>\n

[code]wget –no-check-certificate https:\/\/gist.githubusercontent.com\/koelling\/ef9b2b9d0be6d6dbab63\/raw\/de1730049198c64eaf8f8ab015a3c8b23b63fd34\/gistfile1.c[\/code]<\/p>\n

Then run this to check<\/p>\n

[code]gcc gistfile1.c -o CVE-2015-0235[\/code]<\/p>\n

You may get a gcc file not found error<\/p>\n

[code]# gcc gistfile1.c -o CVE-2015-0235
\n-bash: gcc: command not found[\/code]<\/p>\n

— I am assuming at this time that it means th GNU LibC glibc is not installed and therefore the system is not vulnerable. Similarly the Synology NAS devices that I use are all showing a null result for glibc.<\/p>\n

…..but if gcc is available, then use this to show the result:<\/p>\n

[code].\/CVE-2015-0235[\/code]<\/p>\n

Either your will be “vulnerable” or “not vulnerable”<\/p>\n

and you can follow my adventures in patching Debian and CentOS \/ CPanel servers for glibc<\/a> in another post.<\/p>\n

Thanks to https:\/\/news.ycombinator.com\/item?id=8953545<\/a> for linking me to this originally.<\/p>\n","protected":false},"excerpt":{"rendered":"

Thanks to https:\/\/gist.github.com\/koelling\/ef9b2b9d0be6d6dbab63 for a script to test for this vulnerability. Update: Another option for Debian, at least, is to check ldd –version [code]ldd –version ldd (Debian EGLIBC 2.13-38+deb7u7) 2.13[\/code] Check the last digit in the minor release number, ‘deb7u7’ is good, ‘deb7u6’ or less are vulnerable. First download the file: [code]wget https:\/\/gist.githubusercontent.com\/koelling\/ef9b2b9d0be6d6dbab63\/raw\/de1730049198c64eaf8f8ab015a3c8b23b63fd34\/gistfile1.c[\/code] If you […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14],"tags":[],"class_list":["post-1161","post","type-post","status-publish","format-standard","hentry","category-security"],"_links":{"self":[{"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/posts\/1161","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/comments?post=1161"}],"version-history":[{"count":0,"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/posts\/1161\/revisions"}],"wp:attachment":[{"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/media?parent=1161"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/categories?post=1161"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/howden.net.au\/thowden\/wp-json\/wp\/v2\/tags?post=1161"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}