The ourWriteOut function in tool_writeout.c in curl 7.53.1 might allow physically proximate attackers to obtain sensitive information from process memory in opportunistic circumstances by reading a workstation screen during use of a --write-out argument ending in a '%' character, which leads to a heap-based buffer over-read.
https://security.gentoo.org/glsa/201709-14
https://github.com/curl/curl/commit/1890d59905414ab84a35892b2e45833654aa5c13
https://access.redhat.com/errata/RHSA-2018:3558
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html