Null pointer dereference in ncurses - CVE-2018-19211

Vulnerability identifier: #VU15935

CSH Severity: Low

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-19211

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to NULL pointer dereference condition in the _nc_write_entry function when handling maliciou input. A remote attacker can trick the victim into opening a specially crafted file that submits malicious input, trigger a NULL pointer dereference condition and cause the service to crash.

ncurses
Isolation Segment
VMware Tanzu Application Service for VMs
Tanzu Greenplum for Kubernetes
VMware Tanzu Operations Manager
Ubuntu
Opensuse
libtinfo5 (Ubuntu package)
ncurses-bin (Ubuntu package)
libncurses5 (Ubuntu package)

Install update from vendor's website.

ncurses - update to 6.1.20180414
Tanzu Greenplum for Kubernetes - update to 2.0.0
VMware Tanzu Operations Manager - addressed in versions 2.9.41, 2.10.44
libtinfo5 (Ubuntu package) - update to 6.0+201602131ubuntu1+esm2
ncurses-bin (Ubuntu package) - update to 6.0+201602131ubuntu1+esm2
libncurses5 (Ubuntu package) - update to 6.0+201602131ubuntu1+esm2

• https://bugzilla.redhat.com/show_bug.cgi?id=1643754

• Denial of service in ncurses
• OpenSUSE Linux update for ncurses
• OpenSUSE Linux update for ncurses
• Ubuntu update for ncurses
• VMware Tanzu products update for ncurses