{"id":115207,"date":"2024-04-21T02:30:03","date_gmt":"2024-04-21T00:30:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-glibc-ekspluatiruemaya-cherez-skripty-na-php"},"modified":"2024-04-21T02:30:03","modified_gmt":"2024-04-21T00:30:03","slug":"uyazvimost-v-glibc-ekspluatiruemaya-cherez-skripty-na-php","status":"publish","type":"post","link":"https:\/\/prohoster.info\/en\/blog\/news\/uyazvimost-v-glibc-ekspluatiruemaya-cherez-skripty-na-php","title":{"rendered":"Vulnerability in Glibc exploited via PHP scripts","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

A vulnerability (CVE-2024-2961) has been found in the standard C library Glibc, leading to a buffer overflow when converting specially formatted strings in the ISO-2022-CN-EXT encoding using the iconv() function. The researcher who discovered the issue is scheduled to present at the OffensiveCon conference on May 10, with an announcement mentioning the potential exploitation of this vulnerability through applications written in PHP. It has been stated that the problem affects the entire PHP ecosystem and certain applications. <\/p>\n

When converting strings to UCS4 encoding, in accordance with the requirements of RFC 1922, the library adds certain escape characters that highlight parts of the string where the encoding has changed. The vulnerability is caused by improper boundary checking of internal buffers by the iconv() function, which may lead to a buffer overflow of up to 4 bytes. When overflowing beyond the buffer, specific fixed values can be written, such as '$+I', '$+J', '$+K', '$+L', '$+M', and '$*H'. Although the exploitation of such a vulnerability to execute code seems unlikely, according to the researcher who discovered the issue, it was sufficient to prepare several prototypes of exploits for remote attacks on PHP applications, leading to code execution. <\/p>\n

The vulnerability has been present since the year 2000 and has been fixed in the ongoing development branch of Glibc 2.40. The patch is also available for Glibc releases from 2.32 to 2.39. To track the vulnerability fix in distributions, you can check the pages for: Debian, Ubuntu, Gentoo, RHEL, SUSE, Fedora, Arch.
\n
Source: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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