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WordPress とセキュリティについてかんがえる #wpshinshu / 2019-05-25 Shinshu WordPress Meetup vol.13
Toro_Unit (Hiroshi Urabe)
May 25, 2019
Technology
1
39
WordPress とセキュリティについてかんがえる #wpshinshu / 2019-05-25 Shinshu WordPress Meetup vol.13
Shinshu WordPress Meetup vol.13 登壇資料です。
Toro_Unit (Hiroshi Urabe)
May 25, 2019
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Transcript
WordPress ͱηΩϡϦ ςΟʹ͍͔ͭͯΜ͕͑Δ Toro_Unit @Shinshu WP Meetup vol.12 1
$ whoami 2
Toro_Unit ෦ ߛ (͏Β ͻΖ͠) • Frontend Engineer • WordPress
Plugin and Theme Developer Github: @torounit Twitter: @Toro_Unit 3
ʮηΩϡϦςΟʯʹ͍ͭͯߟ͑Α͏ͱ͍͏͜ͱͰ 4
ͳΜ͔ͯ͠·͢ʁηΩϡϦςΟରࡦ 5
࠷ݶ • WordPress ͷ࠷৽൛Λ͏ɻ • ࣗಈߋ৽͕ಈ࡞͢ΔΑ͏ʹɻ • ࠷৽൛ͷςʔϚͱϓϥάΠϯΛ͏ɻ 6
WordPress ͷͷ߈ܸ͋Ε͜Ε Ҿ༻ݩɿJP-Secure Labs Report Vol.03 | ٕज़ใ | ιϑτΣΞWAFͷJP-Secure
7
• ຊମͷ߈ܸͱ͍͏ͷ࣮গͳ͍ɻ • ϓϥάΠϯɾςʔϚͷ߈ܸ͕6ׂɻ 8
/wp-content/themes/urbancity/lib/scripts/ download.php?file=../../../../../wp-config.php /wp-content/themes/trinity/lib/scripts/ download.php?file=../../../../../wp-config.php /wp-content/themes/MichaelCanthony/download.php?file=../../../wp-config.php /wp-content/themes/TheLoft/download.php?file=../../../wp-config.php /wp-content/themes/lote27/download.php?download=../../../wp-config.php /wp-content/themes/authentic/includes/download.php? file=../../../../wp-config.php /wp-content/plugins/membership-simplified-for-oap-members-only/
download.php?download_file=.././.././.././wp-config.php /wp-content/plugins/ajax-store-locator-wordpress_0/sl_file_download.php? download_file=../../../wp-config.php Ҿ༻ݩɿJP-Secure Labs Report Vol.03 | ٕज़ใ | ιϑτΣΞWAFͷJP- Secure 9
ެࣜϨϙδτϦͷϓϥάΠϯͰ੬ऑੑͷใࠂ͕࠷ۙ͋Γ·͠ ͨɻ ใࠂ ରͷϓϥάΠϯ Πϯετʔϧ όʔδϣϯ ੬ऑੑ 2019/03/15 Easy WP
SMTP 40ສ݅ 1.3.9Ҏલ ཧऀͷಛݖঢ֨ 2019/03/21 Social Warfare 6ສ݅ 3.5.2Ҏલ XSSʢ֨ೲܕʣɺ ҙίʔυͷ࣮ߦ 2019/03/30 Yuzo Related Posts 6ສ݅ 5.12.91Ҏલ XSSʢ֨ೲܕʣ 2019/04/09 Visual CSS Style Editor 3ສ݅ 7.1.9Ҏલ ཧऀͷಛݖঢ֨ WordPressϓϥάΠϯΛૂ͏߈ܸ͕׆ൃԽ͍ͯ͠Δ݅Λ·ͱΊͯΈͨ - piyolog 10
Πϯετʔϧ͕ଟ͍ != ҆શ • ͻͱͭͷج४ʹҧ͍ͳ͍͚Ͳɺ҆શੑɾ࣭Λอূ͢Δج ४Ͱͳ͍ɻ 11
ϓϥάΠϯ 10 બʂΈ͍ͨͳهࣄΛӏವΈʹ͠ͳ͍ɻ 12
• ඞਢϓϥάΠϯͳͲͳ͍ʂ • ඞਢϓϥάΠϯͳΜͯॻ͍ͯΔਓͷใͯʹͳΒΜɻ 13
ςʔϚͷબͼํ 14
• αϙʔτେৎʁ • ༗ྉ != ࣭ɻ࣭ʹ͍Ζ͍Ζ͋Δɻ 15
• ςʔϚʹಉࠝ͞Ε͍ͯΔϑΥʔϜϓϥάΠϯ͕Ξοϓσʔτ ͞Εͣɺ߈ܸ͞ΕΔͱ͍͏ࣄྫɻ • ༗ྉςʔϚʹ߈ܸίʔυ͕ࠞೖ͍ͯͨ͠έʔεɻ 16
ͱΓ͋͑ͣɺWordPress.org ܝࡌͷςʔϚʹ͓ͯ͘͠ͷ͕ແɻ • ͜͜ʹܝࡌ͢ΔʹɺςʔϚͷϨϏϡʔΛ௨ա͢Δඞཁ͋Γɻ࠷ݶͷ࣭ ʢ҆શੑɾ૬ޓӡ༻ੑʣ୲อ͞Ε͍ͯΔ • Ծʹ༗ྉςʔϚΛങ͏ͳΒɺhttps://ja.wordpress.org/themes/commercial/ ʹܝࡌ͞Ε͍ͯΔϞϊɺແྉ൛ͳͲΛɺWP.org ʹܝࡌ͍ͯ͠Δ࡞ऀͷϞϊ Λ͓͢͢Ί͠·͢ɻ
• Snow Monkey • Lightling • LIQUID PRESS • etc... 17
GPL • ແอূ • ࣗ༝ͳෳɾվมɾ൦͕ڐՄ • ίϐʔϨϑτ 18
݁ہͷॴɺ࡞ऀͱͷ͓͖߹͍ • ͘͠શͯࣗ࡞ɻ(ϋʔυϞʔυ) • ʮܧଓ͓͖ͯ͠߹͍͍͚ͯ͠Δ͔Ͳ͏͔ʁʯʮܧଓͨ͠α ϙʔτʯྑ͍બఆج४ɻ 19
• https://wptavern.com/pluginvulnerabilities-com-is- protesting-wordpress-org-support-forum-moderators-by- publishing-zero-day-vulnerabilities • https://www.jp-secure.com/tech/jpsecure-labs/report03/ • https://piyolog.hatenadiary.jp/entry/2019/04/17/183000 • https://capitalp.jp/2017/01/18/sucuri-2016q3/
• https://blog.tokumaru.org/2019/04/Wordpress-Visual-CSS- Style-Editor-privilege-escalation.html?spref=tw 20
Thanks! Github: @torounit Twitter: @Toro_Unit Facebook: fb.me/torounit Blog: https://torounit.com 21