#VU21793 Buffer Over-read in ncurses - CVE-2019-17595

Vulnerability identifier: #VU21793

Vulnerability risk: Medium

CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/U:Green

CVE-ID: CVE-2019-17595

CWE-ID: CWE-126

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerable software:
ncurses

Software vendor:
Free Software Foundation

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to heap-based buffer over-read issue in the "fmt_entry" function in "tinfo/comp_hash.c" in the terminfo library. A remote attacker can trigger a buffer over-read condition and cause a denial of service condition on the target system.

Install updates from vendor's website.

• https://lists.gnu.org/archive/html/bug-ncurses/2019-10/msg00013.html
• https://lists.gnu.org/archive/html/bug-ncurses/2019-10/msg00045.html
• https://github.com/zjuchenyuan/fuzzpoc/raw/master/infotocap_poc3