CVE-2020-26759 Arbitrary code execution in clickhouse-driver
A malicious ClickHouse server can trigger a buffer overflow in the Python driver, leading to arbitrary code execution or crashes on the client.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-26759?
CVE-2020-26759 is a critical memory corruption vulnerability in n/a, published on 6 Jan 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
clickhouse-driver before 0.1.5 allows a malicious clickhouse server to trigger a crash or execute arbitrary code (on a database client) via a crafted server response, due to a buffer overflow.
Weakness: CWE-120
Which versions are affected by CVE-2020-26759?
4 open source packages ship an affected version, including clickhouse-driver and clickhouse. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
clickhouse-driver PyPI | All versions | 0.1.5 |
clickhouse-driver PyPI | All versions | 0.1.5 |
clickhouse-driver PyPI | All versions | 0.1.5 |
clickhouse Bitnami | All versions | 0.1.5 |
Products include Clickhouse-Driver Project Clickhouse-Driver.
How do I fix CVE-2020-26759?
Upgrade clickhouse-driver to 0.1.5 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2020-26759 being exploited?
There is no known exploitation of CVE-2020-26759 in the wild and no public exploit code.
Sources
Also known as BIT-clickhouse-2020-26759, DEBIAN-CVE-2020-26759, GHSA-vgv5-cxvh-vfxh, PYSEC-2021-61.