GNU Emacs up to 24.3 lisp/net/tramp-sh.el link following

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
4.2	$0-$5k	0.00

A vulnerability, which was classified as problematic, has been found in GNU Emacs (Word Processing Software). Affected by this issue is an unknown code of the file lisp/net/tramp-sh.el. The manipulation with an unknown input leads to a link following vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, and integrity. CVE summarizes:

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

The weakness was shared 05/07/2014 by Steve Kemp as Bug#747100 as not defined posting (Mailing List). The advisory is shared for download at lists.gnu.org. This vulnerability is handled as CVE-2014-3424 since 05/07/2014. The attack needs to be approached locally. A simple authentication is needed for exploitation. There are known technical details, but no exploit is available.

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 (93276) and Tenable (74236). The entries 13301, 13302 and 13303 are related to this item.

Productinfo

Type

Word Processing Software

Vendor

Name

Emacs

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
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

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

Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

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-2014-3424 (🔍)
X-Force: 93276 - GNU Emacs tramp-sh.el symlink, Medium Risk
Vulnerability Center: 47649 - GNU Emacs 24.3 and Earlier Local File System Write via a Symlink Attack - CVE-2014-3424, Low
SecurityFocus: 67253 - GNU Emacs Multiple Insecure Temporary File Handling Vulnerabilities

See also: 🔍

Entryinfo

Created: 05/22/2014 17:15
Updated: 06/20/2021 09:52
Changes: 05/22/2014 17:15 (71), 06/15/2017 11:36 (7), 06/20/2021 09:52 (3)
Complete: 🔍