CVE-2015-1803

libXfont: crash on invalid read in bdfReadCharacters

Severity Score

8.5

*CVSS v2

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

La función bdfReadCharacters en bitmap/bdfread.c en X.Org libXfont anterior a 1.4.9 y 1.5.x anterior a 1.5.1 no maneja adecuadamente caracteres bitmaps que no se pueden leer, lo que permite a usuarios remotos autenticados causar una denegación de servicio (referencia a puntero NULO y caída) y la posibilidad de ejecutar código arbitrario a través de un archivo de fuente BDF.

A NULL pointer dereference flaw was discovered in the way libXfont processed certain Glyph Bitmap Distribution Format (BDF) fonts. A malicious, local user could use this flaw to crash the X.Org server.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

Complete

Integrity

Complete

Availability

Complete

Attack Vector

Local

Attack Complexity

Medium

Authentication

None

Confidentiality

None

Integrity

None

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2015-02-17 CVE Reserved
2015-03-18 CVE Published
2024-04-13 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-476: NULL Pointer Dereference

CAPEC

References (18)

URL	Tag	Source
http://advisories.mageia.org/MGASA-2015-0113.html	X_refsource_confirm
http://www.oracle.com/technetwork/topics/security/bulletinapr2015-2511959.html	X_refsource_confirm
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html	X_refsource_confirm
http://www.securityfocus.com/bid/73280	Vdb Entry
http://www.securitytracker.com/id/1031935	Vdb Entry

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152497.html	2016-12-31
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/152838.html	2016-12-31
http://lists.opensuse.org/opensuse-security-announce/2015-03/msg00032.html	2016-12-31
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00002.html	2016-12-31
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00005.html	2016-12-31
http://rhn.redhat.com/errata/RHSA-2015-1708.html	2016-12-31
http://www.debian.org/security/2015/dsa-3194	2016-12-31
http://www.mandriva.com/security/advisories?name=MDVSA-2015:145	2016-12-31
http://www.ubuntu.com/usn/USN-2536-1	2016-12-31
http://www.x.org/wiki/Development/Security/Advisory-2015-03-17	2016-12-31
https://security.gentoo.org/glsa/201507-21	2016-12-31
https://access.redhat.com/security/cve/CVE-2015-1803	2015-09-03
https://bugzilla.redhat.com/show_bug.cgi?id=1203718	2015-09-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				10.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "10.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				14.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "14.10"		-		Affected
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				<= 1.4.8 Search vendor "X" for product "Libxfont" and version " <= 1.4.8"		-		Affected
X Search vendor "X"		Libxfont Search vendor "X" for product "Libxfont"				1.5.0 Search vendor "X" for product "Libxfont" and version "1.5.0"		-		Affected