ytnef up to 1.9.0 null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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7.2$0-$5k0.00

Summaryinfo

A vulnerability was found in ytnef up to 1.9.0. It has been declared as critical. The impacted element is an unknown function. The manipulation results in null pointer dereference. This vulnerability is identified as CVE-2017-6298. The attack is only possible with local access. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in ytnef up to 1.9.0 (Document Reader Software). Affected is some unknown processing. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in ytnef before 1.9.1. This is related to a patch described as "1 of 9. Null Pointer Deref / calloc return value not checked."

The bug was discovered 02/23/2017. The weakness was released 02/24/2017 by Eric Sesterhenn with X41 D-Sec GmbH (Website). The advisory is shared for download at openwall.com. This vulnerability is traded as CVE-2017-6298 since 02/23/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 99044 (Debian DLA-878-1 : libytnef 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 196783 (Ubuntu Security Notification for Libytnef Vulnerabilities (USN-3288-1)).

Upgrading to version 1.9.1 eliminates this vulnerability. A possible mitigation has been published 2 months after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (99044) and SecurityFocus (BID 96423†). Entries connected to this vulnerability are available at VDB-97237, VDB-97238, VDB-97239 and VDB-97240. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 99044
Nessus Name: Debian DLA-878-1 : libytnef security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703846
OpenVAS Name: Debian Security Advisory DSA 3846-1 (libytnef - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

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

Upgrade: ytnef 1.9.1

Timelineinfo

02/23/2017 🔍
02/23/2017 +0 days 🔍
02/23/2017 +0 days 🔍
02/23/2017 +0 days 🔍
02/24/2017 +1 days 🔍
02/24/2017 +0 days 🔍
03/28/2017 +32 days 🔍
03/30/2017 +2 days 🔍
08/16/2020 +1235 days 🔍

Sourcesinfo

Advisory: openwall.com
Researcher: Eric Sesterhenn
Organization: X41 D-Sec GmbH
Status: Not defined

CVE: CVE-2017-6298 (🔍)
GCVE (CVE): GCVE-0-2017-6298
GCVE (VulDB): GCVE-100-97236

OVAL: 🔍

SecurityFocus: 96423 - ytnef Multiple Security Vulnerabilities
OSVDB: - CVE-2017-6298 - ytnef - Null Pointer Issue

See also: 🔍

Entryinfo

Created: 02/24/2017 10:40
Updated: 08/16/2020 17:18
Changes: 02/24/2017 10:40 (75), 08/16/2020 17:18 (7)
Complete: 🔍
Cache ID: 216:647:103

Once again VulDB remains the best source for vulnerability data.

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