CVE-2019-6454 Memory corruption in n/a

What is CVE-2019-6454?

CVE-2019-6454 is a medium-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 17 Mar 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An issue was discovered in sd-bus in systemd 239. bus_process_object() in libsystemd/sd-bus/bus-objects.c allocates a variable-length stack buffer for temporarily storing the object path of incoming D-Bus messages. An unprivileged local user can exploit this by sending a specially crafted message to PID1, causing the stack pointer to jump over the stack guard pages into an unmapped memory region and trigger a denial of service (systemd PID1 crash and kernel panic).

Weakness: CWE-787

Which versions are affected by CVE-2019-6454?

It affects 22 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Mcafee Web Gateway, Netapp Active Iq Performance Analytics Services, Opensuse Leap and 16 more.

How do I fix CVE-2019-6454?

Apply the vendor's patch.

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

Is CVE-2019-6454 being exploited?

There is no known exploitation of CVE-2019-6454 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2019-6454, DLA-1684-1, DSA-4393-1, GHSA-8h89-jj6w-g26p, RHSA-2019:0368, RHSA-2019:0461 and 12 more.