{"id":38530,"date":"2019-10-31T22:24:20","date_gmt":"2019-10-31T19:24:20","guid":{"rendered":"https:\/\/prohoster.info\/blog\/opublikovan-exim-4-92-3-s-ustraneniem-chetvyortoj-za-god-kriticheskoj-uyazvimosti\/"},"modified":"2019-10-31T22:24:20","modified_gmt":"2019-10-31T19:24:20","slug":"opublikovan-exim-4-92-3-s-ustraneniem-chetvyortoj-za-god-kriticheskoj-uyazvimosti","status":"publish","type":"post","link":"https:\/\/prohoster.info\/en\/blog\/news\/opublikovan-exim-4-92-3-s-ustraneniem-chetvyortoj-za-god-kriticheskoj-uyazvimosti","title":{"rendered":"Exim 4.92.3 has been released, addressing the fourth critical vulnerability of the year.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Published<\/a><\/noindex> Emergency release of the mail server Exim 4.92.3<\/a><\/noindex> addressing yet another critical vulnerability<\/a><\/noindex> (CVE-2019-16928<\/a><\/noindex>), potentially allowing remote code execution on the server through a specially crafted string in the EHLO command. The vulnerability occurs after privilege escalation and is limited to executing code with the rights of a non-privileged user under which the incoming message handler operates.<\/p>\n

The issue only affects the Exim 4.92 branch (4.92.0, 4.92.1, and 4.92.2) and does not overlap with the vulnerability fixed earlier this month CVE-2019-15846<\/a><\/noindex>. The vulnerability is caused by a buffer overflow in the function string_vformat()<\/a><\/noindex>, defined in the string.c file. The demonstrated exploit<\/a><\/noindex> can cause a crash by passing a long string (several kilobytes) in the EHLO command, but the vulnerability can also be exploited through other commands and potentially used for remote code execution.<\/p>\n

No workarounds to mitigate the vulnerability exist, so all users are strongly advised to urgently install the update, apply patch<\/a><\/noindex> or ensure they are using distribution-provided packages that include fixes for the relevant vulnerabilities. The fix has been released for Ubuntu<\/a><\/noindex> (affects only the 19.04 branch), Arch Linux<\/a><\/noindex>, FreeBSD<\/a><\/noindex>, Debian<\/a><\/noindex> (affects only Debian 10 Buster) and Alpine<\/a><\/noindex>. RHEL and CentOS are not affected by the issue as Exim is not included in their default package repository (in EPEL7<\/a><\/noindex> the update is still is missing<\/a><\/noindex>). In SUSE\/openSUSE, the vulnerability does not manifest due to the use of Exim version 4.88.<\/p>\n

<\/a><\/noindex><\/p>\n

Source: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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