CVE-2020-10378 Out-of-bounds read in Pillow

What is CVE-2020-10378?

CVE-2020-10378 is a medium-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 25 Jun 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

In libImaging/PcxDecode.c in Pillow before 7.1.0, an out-of-bounds read can occur when reading PCX files where state->shuffle is instructed to read beyond state->buffer.

Weakness: CWE-125

Which versions are affected by CVE-2020-10378?

4 open source packages ship an affected version, including pillow. It affects 3 products.

Products include Canonical Ubuntu Linux, Fedoraproject Fedora, Python Pillow.

How do I fix CVE-2020-10378?

Upgrade pillow to 7.1.0 or later.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2020-10378 being exploited?

There is no known exploitation of CVE-2020-10378 in the wild and no public exploit code.

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 BIT-pillow-2020-10378, DEBIAN-CVE-2020-10378, GHSA-3xv8-3j54-hgrp, PYSEC-2020-77, UBUNTU-CVE-2020-10378.