{"id":33548,"date":"2019-10-31T21:53:15","date_gmt":"2019-10-31T18:53:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/uyazvimost-v-setevom-steke-yadra-linux\/"},"modified":"2019-10-31T21:53:15","modified_gmt":"2019-10-31T18:53:15","slug":"uyazvimost-v-setevom-steke-yadra-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/hu\/blog\/news\/uyazvimost-v-setevom-steke-yadra-linux","title":{"rendered":"Sebezhet\u0151s\u00e9g a Linux kernel h\u00e1l\u00f3zati verem\u00e9ben","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A TCP-based RDS protocol handler code (Reliable Datagram Socket, net\/rds\/tcp.c) has a vulnerability (CVE-2019-11815<\/a><\/noindex>), which may lead to access to already freed memory and denial of service (it is potentially possible to exploit the issue to execute code). The problem is caused by a race condition that can occur during the execution of the rds_tcp_kill_sock function while cleaning up sockets for the network namespace. <\/p>\n

In the specification NVD<\/a><\/noindex> the issue is marked as remotely exploitable, but from the description jav\u00edt\u00e1sok<\/a><\/noindex>, without local presence in the system and manipulation of namespaces, an attack cannot be organized remotely. In particular, according to szerint<\/a><\/noindex> SUSE developers, the vulnerability can only be exploited locally; organizing an attack is quite complex and requires additional privileges in the system. While in NVD the severity level is rated at 9.3 (CVSS v2) and 8.1 (CVSS v2), according to SUSE, the danger is rated at 6.4 out of 10. <\/p>\n

Ubuntu representatives also assessed<\/a><\/noindex> the danger of the issue as moderate. At the same time, according to the CVSS v3.0 specification, the issue is assigned a high level of attack complexity, with the possibility of exploitation rated only 2.2 out of 10.<\/p>\n

According to a report<\/a><\/noindex> from Cisco, the vulnerability is exploited remotely by sending TCP packets to active network services RDS<\/a><\/noindex> and a prototype exploit already exists. How accurate this information is remains unclear; possibly, the report merely artistically formats NVD's assumptions. According to data<\/a><\/noindex> from VulDB, the exploit has not yet been created, and the issue is only exploited locally.<\/p>\n

The problem manifests in kernels up to 5.0.8 and is blocked by the March patch<\/a><\/noindex>, included in kernel version 5.0.8. In most distributions, the problem remains unresolved (Debian<\/a><\/noindex>, RHEL<\/a><\/noindex>, Ubuntu<\/a><\/noindex>, SUSE<\/a><\/noindex>). A fix has been released for SLE12 SP3, openSUSE 42.3 and Fedora<\/a><\/noindex>.<\/p>\n

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

Forr\u00e1s: opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u043e\u0447\u0438\u0441\u0442\u043a\u0438 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-33548","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47 Vulnerability in the Linux kernel network stack | ProHoster","description":"A TCP-based RDS protocol handler code (Reliable Datagram Socket, net\/rds\/tcp.c) has a vulnerability 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