CVE-2019-16239 Memory corruption in n/a

Critical 9.8 Published 17 Sep 2019 Updated 5 Aug 2024

A buffer overflow in OpenConnect allows a malicious server to execute arbitrary code or cause denial of service via crafted HTTP chunked encoding.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2019-16239?

CVE-2019-16239 is a critical memory corruption vulnerability in Canonical Ubuntu Linux, published on 17 Sep 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

process_http_response in OpenConnect before 8.05 has a Buffer Overflow when a malicious server uses HTTP chunked encoding with crafted chunk sizes.

Weakness: CWE-120

Which versions are affected by CVE-2019-16239?

It affects 5 products.

Linux distribution packages (7)

`openconnect` SUSE:Linux Enterprise Desktop 12 SP4	All versions	`7.08-3.4.1`
`openconnect` SUSE:Linux Enterprise Workstation Extension 12 SP4	All versions	`7.08-3.4.1`
`openconnect` SUSE:Linux Enterprise Workstation Extension 12 SP5	All versions	`7.08-3.4.1`
`openconnect` SUSE:Linux Enterprise Workstation Extension 15	All versions	`7.08-6.3.1`
`openconnect` SUSE:Linux Enterprise Workstation Extension 15 SP1	All versions	`7.08-6.3.1`
`openconnect` openSUSE:Leap 15.0	All versions	`7.08-lp150.5.3.1`
`openconnect` openSUSE:Leap 15.1	All versions	`7.08-lp151.6.3.1`

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Infradead Openconnect, Opensuse Leap.

How do I fix CVE-2019-16239?

Upgrade to a fixed version.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2019-16239 being exploited?

There is no known exploitation of CVE-2019-16239 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as DEBIAN-CVE-2019-16239, DLA-1945-1, DSA-4607-1, GHSA-j5c8-5345-567f, MGASA-2020-0005, SUSE-SU-2019:2737-1 and 7 more.