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#1 2016-08-11 13:57:03
morfik - 
Cenzor wirtualnego świata
Dziura w TCP na linuxie
Do poczytania tu:
https://nfsec.pl/security/5872
https://git.zx2c4.com/linux/commit/?id=75ff39ccc1bd5d3c455b6822ab09e533c551f758
http://www.isssource.com/fixing-an-internet-security-threat/
Do załatania w kernelach 3.6 – 4.7 w /etc/sysctl.conf :
Kod:
net.ipv4.tcp_challenge_ack_limit = 999999999
Offline
Informacje debugowania
| Time (s) | Query |
|---|---|
| 0.00007 | SET CHARSET latin2 |
| 0.00004 | SET NAMES latin2 |
| 0.00051 | SELECT u.*, g.*, o.logged FROM punbb_users AS u INNER JOIN punbb_groups AS g ON u.group_id=g.g_id LEFT JOIN punbb_online AS o ON o.ident='18.117.84.106' WHERE u.id=1 |
| 0.00104 | REPLACE INTO punbb_online (user_id, ident, logged) VALUES(1, '18.117.84.106', 1715778642) |
| 0.00058 | SELECT * FROM punbb_online WHERE logged<1715778342 |
| 0.00050 | SELECT topic_id FROM punbb_posts WHERE id=304096 |
| 0.00027 | SELECT id FROM punbb_posts WHERE topic_id=28849 ORDER BY posted |
| 0.00110 | SELECT t.subject, t.closed, t.num_replies, t.sticky, f.id AS forum_id, f.forum_name, f.moderators, fp.post_replies, 0 FROM punbb_topics AS t INNER JOIN punbb_forums AS f ON f.id=t.forum_id LEFT JOIN punbb_forum_perms AS fp ON (fp.forum_id=f.id AND fp.group_id=3) WHERE (fp.read_forum IS NULL OR fp.read_forum=1) AND t.id=28849 AND t.moved_to IS NULL |
| 0.00030 | SELECT search_for, replace_with FROM punbb_censoring |
| 0.00053 | SELECT u.email, u.title, u.url, u.location, u.use_avatar, u.signature, u.email_setting, u.num_posts, u.registered, u.admin_note, p.id, p.poster AS username, p.poster_id, p.poster_ip, p.poster_email, p.message, p.hide_smilies, p.posted, p.edited, p.edited_by, g.g_id, g.g_user_title, o.user_id AS is_online FROM punbb_posts AS p INNER JOIN punbb_users AS u ON u.id=p.poster_id INNER JOIN punbb_groups AS g ON g.g_id=u.group_id LEFT JOIN punbb_online AS o ON (o.user_id=u.id AND o.user_id!=1 AND o.idle=0) WHERE p.topic_id=28849 ORDER BY p.id LIMIT 0,25 |
| 0.00244 | UPDATE punbb_topics SET num_views=num_views+1 WHERE id=28849 |
| Total query time: 0.00738 s | |