Heap-based buffer overflow in Gnuplot - CVE-2018-19490

Vulnerability identifier: #VU16070

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2018-19490

CWE-ID: CWE-122

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The vulnerability exists in the datafile.c source code file due to boundary error when handling maliciou input. A local attacker can make a specially crafted request that submits a long string as the right bound of the range option to be passed to the plot function, trigger memory corruption condition and cause a DoS condition or execute arbitrary code with elevated privileges.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Gnuplot
Ubuntu
Opensuse
gnuplot (Ubuntu package)
gnuplot-data (Ubuntu package)
gnuplot-nox (Ubuntu package)
gnuplot-qt (Ubuntu package)
gnuplot-tex (Ubuntu package)
gnuplot-x11 (Ubuntu package)

Install update from vendor's website.

gnuplot (Ubuntu package) - addressed in versions 4.6.4-2ubuntu0.1~esm1, 4.6.6-3ubuntu0.1, 4.6.6-3ubuntu0.1+esm1, 5.2.2+dfsg1-2ubuntu1+esm1, 5.2.8+dfsg1-2ubuntu0.1~esm1
gnuplot-data (Ubuntu package) - update to 4.6.6-3ubuntu0.1
gnuplot-nox (Ubuntu package) - update to 4.6.6-3ubuntu0.1
gnuplot-qt (Ubuntu package) - update to 4.6.6-3ubuntu0.1
gnuplot-tex (Ubuntu package) - update to 4.6.6-3ubuntu0.1
gnuplot-x11 (Ubuntu package) - update to 4.6.6-3ubuntu0.1

• https://sourceforge.net/p/gnuplot/bugs/2093/

• Privilege escalation in Gnuplot
• OpenSUSE Linux update for gnuplot
• Ubuntu update for gnuplot
• Ubuntu update for gnuplot