QID 671128

Core x11 protocol client library.
Security fix(es): an issue was discovered in libx11 through 1.6.5.
The function xlistextensions in listext.c interprets a variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading to dos or remote code execution.(cve-2018-14600) an issue was discovered in libx11 through 1.6.5.
The function xlistextensions in listext.c is vulnerable to an off-by-one error caused by malicious server responses, leading to dos or possibly unspecified other impact.(cve-2018-14599) an issue was discovered in xlistextensions in listext.c in libx11 through 1.6.5.
A malicious server can send a reply in which the first string overflows, causing a variable to be set to null that will be freed later on, leading to dos (segmentation fault).(cve-2018-14598)

Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

An arbitrary attacker may exploit this vulnerability to compromise the system.