CVE-2015-1803: Null Pointer Dereference
First published: Fri Mar 20 2015(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Ubuntu | =10.04 | |
| Ubuntu | =12.04 | |
| Ubuntu | =14.04 | |
| Ubuntu | =14.10 | |
| Debian | =7.0 | |
| Red Hat Libxfont | <=1.4.8 | |
| Red Hat Libxfont | =1.5.0 |
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Reference Links
- http://advisories.mageia.org/MGASA-2015-0113.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152497.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152838.html
- http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00032.html
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00005.html
- http://rhn.redhat.com/errata/RHSA-2015-1708.html
- http://www.debian.org/security/2015/dsa-3194
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:145
- http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- http://www.securityfocus.com/bid/73280
- http://www.securitytracker.com/id/1031935
- http://www.ubuntu.com/usn/USN-2536-1
- http://www.x.org/wiki/Development/Security/Advisory-2015-03-17/
- https://security.gentoo.org/glsa/201507-21
Frequently Asked Questions
What is the severity of CVE-2015-1803?
CVE-2015-1803 is considered a high severity vulnerability that can lead to denial of service and potential unauthorized actions.
How do I fix CVE-2015-1803?
To fix CVE-2015-1803, upgrade X.Org libXfont to version 1.4.9 or later.
Which systems are affected by CVE-2015-1803?
CVE-2015-1803 affects specific versions of Ubuntu Linux (10.04, 12.04, 14.04, 14.10) and Debian Linux 7.0.
What types of attacks can CVE-2015-1803 facilitate?
CVE-2015-1803 can facilitate a denial of service attack through a NULL pointer dereference, leading to system crashes.
Are there any known exploits for CVE-2015-1803?
Yes, CVE-2015-1803 can be exploited by remote authenticated users to trigger a crash of the affected service.
- agent/references
- agent/type
- agent/first-publish-date
- agent/last-modified-date
- agent/description
- agent/weakness
- agent/severity
- agent/author
- agent/event
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/canonical
- canonical/ubuntu
- version/ubuntu/10.04
- version/ubuntu/12.04
- version/ubuntu/14.04
- version/ubuntu/14.10
- vendor/debian
- canonical/debian
- version/debian/7.0
- vendor/x
- canonical/red hat libxfont
- version/red hat libxfont/1.4.8
- version/red hat libxfont/1.5.0