CVE-2020-18899 Denial of service in n/a
Attackers can cause a denial of service in applications using Exiv2 by providing crafted input that triggers uncontrolled memory allocation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2020-18899?
CVE-2020-18899 is a medium-severity denial of service vulnerability in Exiv2 Exiv2, published on 19 Aug 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
An uncontrolled memory allocation in DataBufdata(subBox.length-sizeof(box)) function of Exiv2 0.27 allows attackers to cause a denial of service (DOS) via a crafted input.
Weakness: CWE-770
Which versions are affected by CVE-2020-18899?
1 open source package ship an affected version, including exiv2. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
exiv2 PyPI | All versions | None |
Products include Exiv2 Exiv2.
How do I fix CVE-2020-18899?
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-2020-18899 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-18899 exists.
Other vulnerabilities in Exiv2 Exiv2
Sources
Also known as DEBIAN-CVE-2020-18899, GHSA-44mj-pwh6-pw78, PYSEC-2021-879.