CVE-2018-7550 Memory corruption in n/a

What is CVE-2018-7550?

CVE-2018-7550 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 1 Mar 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The load_multiboot function in hw/i386/multiboot.c in Quick Emulator (aka QEMU) allows local guest OS users to execute arbitrary code on the QEMU host via a mh_load_end_addr value greater than mh_bss_end_addr, which triggers an out-of-bounds read or write memory access.

Weakness: CWE-787, CWE-125

Which versions are affected by CVE-2018-7550?

It affects 9 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Qemu Qemu, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus and 3 more.

How do I fix CVE-2018-7550?

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-2018-7550 being exploited?

There is no known exploitation of CVE-2018-7550 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
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2018-7550, DLA-1350-1, DLA-1351-1, GHSA-6q85-h749-54pf, GHSA-f49v-45qp-cv53, UBUNTU-CVE-2018-7550.