CVE-2017-9438 Denial of service in n/a
Remote attackers can cause a denial of service via stack consumption in YARA by submitting crafted rules with hex strings.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-9438?
CVE-2017-9438 is a high-severity denial of service vulnerability in n/a, published on 5 Jun 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
libyara/re.c in the regexp module in YARA 3.5.0 allows remote attackers to cause a denial of service (stack consumption) via a crafted rule (involving hex strings) that is mishandled in the _yr_re_emit function, a different vulnerability than CVE-2017-9304.
Weakness: CWE-674
Which versions are affected by CVE-2017-9438?
It affects 1 product.
Products include Virustotal Yara.
How do I fix CVE-2017-9438?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2017-9438 being exploited?
There is no known exploitation of CVE-2017-9438 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2017-9438, GHSA-24f8-4r56-7793, UBUNTU-CVE-2017-9438.