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6.4	$0-$5k	0.00

Summaryinfo

A vulnerability has been found in X.org libXfont and classified as critical. This affects the function fs_get_reply/fs_alloc_glyphs/fs_read_extent_info of the file fserve.c. This manipulation causes numeric error. The identification of this vulnerability is CVE-2014-0211. There is no exploit available. To fix this issue, it is recommended to deploy a patch.

Detailsinfo

A vulnerability was found in X.org libXfont. It has been declared as critical. Affected by this vulnerability is the function fs_get_reply/fs_alloc_glyphs/fs_read_extent_info of the file fserve.c. The manipulation with an unknown input leads to a numeric error vulnerability. The CWE definition for the vulnerability is CWE-189. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Multiple integer overflows in the (1) fs_get_reply, (2) fs_alloc_glyphs, and (3) fs_read_extent_info functions in X.Org libXfont before 1.4.8 and 1.4.9x before 1.4.99.901 allow remote font servers to execute arbitrary code via a crafted xfs reply, which triggers a buffer overflow.

The weakness was shared 05/12/2014 by Huzaifa S. Sidhpurwala as Bug 1096601 as confirmed bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is known as CVE-2014-0211 since 12/03/2013. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit. The advisory points out:

When parsing replies received from the font server, these calls do not check that their calculations for how much memory is needed to handle the returned data have not overflowed, so can result in allocating too little memory and then writing the returned data past the end of the allocated buffer.

The vulnerability scanner Nessus provides a plugin with the ID 73997 (Debian DSA-2927-1 : libxfont - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350808 (Amazon Linux Security Advisory for libXfont: AL2012-2015-023).

Applying a patch is able to eliminate this problem. The bugfix is ready for download at cgit.freedesktop.org. A possible mitigation has been published 1 days after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (93146), Tenable (73997), SecurityFocus (BID 67382†), Secunia (SA58474†) and SecurityTracker (ID 1030238†). The entries VDB-13217, VDB-13218, VDB-67096 and VDB-67083 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• X.org

Name

• libXfont

Version

• 1.2.3
• 1.2.4
• 1.2.5
• 1.2.6
• 1.2.7
• 1.2.8
• 1.2.9
• 1.3.0
• 1.3.1
• 1.3.2
• 1.3.3
• 1.3.4
• 1.4.0
• 1.4.1
• 1.4.2
• 1.4.3
• 1.4.4
• 1.4.5
• 1.4.6
• 1.4.7
• 1.4.99

License

• open-source

Website

• Vendor: https://www.x.org/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.4

VulDB Base Score: 7.3
VulDB Temp Score: 6.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 73997
Nessus Name: Debian DSA-2927-1 : libxfont - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 702927
OpenVAS Name: Debian Security Advisory DSA 2927-1 (libxfont - security update
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Patch: cgit.freedesktop.org

Timelineinfo

12/03/2013 🔍
05/12/2014 +160 days 🔍
05/12/2014 +0 days 🔍
05/13/2014 +1 days 🔍
05/14/2014 +1 days 🔍
05/14/2014 +0 days 🔍
05/15/2014 +1 days 🔍
05/15/2014 +0 days 🔍
05/16/2014 +1 days 🔍
05/17/2018 +1462 days 🔍

Sourcesinfo

Vendor: x.org

Advisory: Bug 1096601
Researcher: Huzaifa S. Sidhpurwala
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-0211 (🔍)
GCVE (CVE): GCVE-0-2014-0211
GCVE (VulDB): GCVE-100-13219

OVAL: 🔍

X-Force: 93146 - X.Org libXfont multiple functions buffer overflow, High Risk
SecurityFocus: 67382
Secunia: 58474 - X.Org libXfont Multiple Vulnerabilities, Less Critical
SecurityTracker: 1030238

See also: 🔍

Entryinfo

Created: 05/16/2014 16:22
Updated: 05/17/2018 08:55
Changes: 05/16/2014 16:22 (81), 05/17/2018 08:55 (6)
Complete: 🔍
Cache ID: 216:FCB:103

Discussion

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