GNU Emacs up to 24.3 lisp/net/browse-url.el link following

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability has been found in GNU Emacs and classified as problematic. This issue affects some unknown processing of the file lisp/net/browse-url.el. This manipulation causes link following. This vulnerability appears as CVE-2014-3423. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in GNU Emacs (Word Processing Software). Affected by this vulnerability is an unknown part of the file lisp/net/browse-url.el. The manipulation with an unknown input leads to a link following vulnerability. The CWE definition for the vulnerability is CWE-59. The product attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource. As an impact it is known to affect confidentiality, and integrity. The summary by CVE is:

lisp/net/browse-url.el in GNU Emacs 24.3 and earlier allows local users to overwrite arbitrary files via a symlink attack on a /tmp/Mosaic.##### temporary file.

The weakness was presented 05/07/2014 by Steve Kemp as Bug#747100 as not defined posting (Mailing List). It is possible to read the advisory at lists.gnu.org. This vulnerability is known as CVE-2014-3423 since 05/07/2014. Attacking locally is a requirement. A single authentication is necessary for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 74236 (Fedora 20 : emacs-24.3-17.fc20 (2014-6554)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 167782 (SUSE Enterprise Linux Security update for emacs (SUSE-SU-2015:0834-1)).

Upgrading to version 24.3.91 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (93275), Tenable (74236), SecurityFocus (BID 67253†) and Vulnerability Center (SBV-47651†). See VDB-13301, VDB-13302 and VDB-13304 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Link following
CWE: CWE-59
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 74236
Nessus Name: Fedora 20 : emacs-24.3-17.fc20 (2014-6554)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for emacs FEDORA-2014-6554
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Emacs 24.3.91

Timelineinfo

05/05/2014 🔍
05/05/2014 +0 days 🔍
05/07/2014 +2 days 🔍
05/07/2014 +0 days 🔍
05/08/2014 +1 days 🔍
05/22/2014 +14 days 🔍
12/17/2014 +209 days 🔍
06/20/2021 +2377 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: Bug#747100
Researcher: Steve Kemp
Status: Not defined
Confirmation: 🔍

CVE: CVE-2014-3423 (🔍)
GCVE (CVE): GCVE-0-2014-3423
GCVE (VulDB): GCVE-100-13303
X-Force: 93275 - GNU Emacs browse-url.el symlink, Medium Risk
SecurityFocus: 67253 - GNU Emacs Multiple Insecure Temporary File Handling Vulnerabilities
Vulnerability Center: 47651 - GNU Emacs 24.3 and Earlier Local File System Write via a Symlink Attack - CVE-2014-3423, Low

See also: 🔍

Entryinfo

Created: 05/22/2014 17:14
Updated: 06/20/2021 09:51
Changes: 05/22/2014 17:14 (70), 06/15/2017 11:36 (8), 06/20/2021 09:51 (3)
Complete: 🔍
Cache ID: 216::103

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