VDB-108831 · CVE-2017-1000383 · BID 101671

GNU Emacs up to 25.3.1 Backup Save File Permission information disclosure

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.
5.4	$0-$5k	0.00

Summaryinfo

A vulnerability identified as critical has been detected in GNU Emacs up to 25.3.1. This affects an unknown function of the component Backup Save File Handler. Performing a manipulation results in information disclosure (Permission). This vulnerability is identified as CVE-2017-1000383. The attack is only possible with local access. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in GNU Emacs up to 25.3.1 (Word Processing Software). This affects some unknown functionality of the component Backup Save File Handler. The manipulation with an unknown input leads to a information disclosure vulnerability (Permission). CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

GNU Emacs version 25.3.1 (and other versions most likely) ignores umask when creating a backup save file ("[ORIGINAL_FILENAME]~") resulting in files that may be world readable or otherwise accessible in ways not intended by the user running the emacs binary.

The bug was discovered 10/31/2017. The weakness was released 10/31/2017 (oss-sec). It is possible to read the advisory at openwall.com. This vulnerability is uniquely identified as CVE-2017-1000383 since 10/31/2017. Attacking locally is a requirement. A authentication is required for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 101671†). Entry connected to this vulnerability is available at VDB-108830. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Word Processing Software

Vendor

Name

Emacs

Version

License

open-source

Website

Vendor: https://www.gnu.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: Permission
Class: Information disclosure / Permission
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/31/2017 🔍
10/31/2017 +0 days 🔍
10/31/2017 +0 days 🔍
10/31/2017 +0 days 🔍
10/31/2017 +0 days 🔍
11/01/2017 +1 days 🔍
01/21/2021 +1177 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: openwall.com
Researcher: Hanno Böck
Status: Not defined

CVE: CVE-2017-1000383 (🔍)
GCVE (CVE): GCVE-0-2017-1000383
GCVE (VulDB): GCVE-100-108831
SecurityFocus: 101671

See also: 🔍

Entryinfo

Created: 11/01/2017 07:42
Updated: 01/21/2021 10:37
Changes: 11/01/2017 07:42 (59), 12/02/2019 11:42 (1), 01/21/2021 10:37 (5)
Complete: 🔍
Cache ID: 216::103