CVE-2015-1803 Null dereference in n/a

What is CVE-2015-1803?

CVE-2015-1803 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 20 Mar 2015. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

The bdfReadCharacters function in bitmap/bdfread.c in X.Org libXfont before 1.4.9 and 1.5.x before 1.5.1 does not properly handle character bitmaps it cannot read, which allows remote authenticated users to cause a denial of service (NULL pointer dereference and crash) and possibly execute arbitrary code via a crafted BDF font file.

Which versions are affected by CVE-2015-1803?

It affects 3 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, X Libxfont.

How do I fix CVE-2015-1803?

Upgrade to a fixed version.

Is CVE-2015-1803 being exploited?

There is no known exploitation of CVE-2015-1803 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 DEBIAN-CVE-2015-1803, GHSA-7vwv-c4f9-4xwx, UBUNTU-CVE-2015-1803.