CVE-2018-12617 Integer overflow in n/a

What is CVE-2018-12617?

CVE-2018-12617 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 21 Jun 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

qmp_guest_file_read in qga/commands-posix.c and qga/commands-win32.c in qemu-ga (aka QEMU Guest Agent) in QEMU 2.12.50 has an integer overflow causing a g_malloc0() call to trigger a segmentation fault when trying to allocate a large memory chunk. The vulnerability can be exploited by sending a crafted QMP command (including guest-file-read with a large count value) to the agent via the listening socket.

Weakness: CWE-190

Which versions are affected by CVE-2018-12617?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Qemu Qemu.

How do I fix CVE-2018-12617?

Apply the vendor's patch.

Is CVE-2018-12617 being exploited?

There is no known exploitation of CVE-2018-12617 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

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-2018-12617, GHSA-prpr-q2gp-hgw2, SUSE-SU-2018:2679-1, UBUNTU-CVE-2018-12617.