Arch Linux Security Advisory ASA-201811-5 ========================================= Severity: High Date : 2018-11-06 CVE-ID : CVE-2018-16840 Package : libcurl-compat Type : arbitrary code execution Remote : Yes Link : https://security.archlinux.org/AVG-800 Summary ======= The package libcurl-compat before version 7.62.0-1 is vulnerable to arbitrary code execution. Resolution ========== Upgrade to 7.62.0-1. # pacman -Syu "libcurl-compat>=7.62.0-1" The problem has been fixed upstream in version 7.62.0. Workaround ========== None. Description =========== A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct. Impact ====== A malicious remote server might be able to execute arbitrary commands by closing the connection from a client using easy handlers. References ========== https://curl.haxx.se/docs/CVE-2018-16840.html https://github.com/curl/curl/commit/81d135d67155c5295b1033679c606165d4e28f3f https://security.archlinux.org/CVE-2018-16840