CVE-2017-9445 Memory corruption in n/a

What is CVE-2017-9445?

CVE-2017-9445 is a high-severity memory corruption vulnerability in Systemd Project Systemd, published on 28 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In systemd through 233, certain sizes passed to dns_packet_new in systemd-resolved can cause it to allocate a buffer that's too small. A malicious DNS server can exploit this via a response with a specially crafted TCP payload to trick systemd-resolved into allocating a buffer that's too small, and subsequently write arbitrary data beyond the end of it.

Weakness: CWE-787

Which versions are affected by CVE-2017-9445?

It affects 1 product.

Products include Systemd Project Systemd.

How do I fix CVE-2017-9445?

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-2017-9445 being exploited?

There is no known exploitation of CVE-2017-9445 in the wild and no public exploit code.

Other vulnerabilities in Systemd Project Systemd

• CVE-2015-7510 Memory corruption in n/a Critical 9.8
• CVE-2017-1000082 Privilege escalation in n/a Critical 9.8
• CVE-2016-10156 Privilege escalation in n/a High 7.8
• CVE-2017-9217 Null dereference in n/a High 7.5
• CVE-2026-40224 Privilege escalation in systemd Medium 6.7

All Systemd Project Systemd vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2017-9445, GHSA-42xm-66qf-5jj8, SUSE-SU-2017:1898-1, UBUNTU-CVE-2017-9445.