ytnef up to 1.9.1 DecompressRTF memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in ytnef up to 1.9.1. This issue affects the function DecompressRTF. Executing a manipulation can lead to memory corruption. This vulnerability is handled as CVE-2017-6802. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in ytnef up to 1.9.1 (Document Reader Software) and classified as critical. This vulnerability affects the function DecompressRTF. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

An issue was discovered in ytnef before 1.9.2. There is a potential heap-based buffer over-read on incoming Compressed RTF Streams, related to DecompressRTF() in libytnef.

The bug was discovered 03/10/2017. The weakness was released 03/10/2017 (GitHub Repository). The advisory is shared for download at github.com. This vulnerability was named CVE-2017-6802 since 03/10/2017. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is 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 176025 (Debian Security Update for libytnef (DSA 3846-1)).

Upgrading to version 1.9.2 eliminates this vulnerability. A possible mitigation has been published 3 weeks after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (99044). Entries connected to this vulnerability are available at VDB-97236, VDB-97237, VDB-97238 and VDB-97239. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 6.9

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

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
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 1.9.2

Timelineinfo

03/10/2017 🔍
03/10/2017 +0 days 🔍
03/10/2017 +0 days 🔍
03/10/2017 +0 days 🔍
03/10/2017 +0 days 🔍
03/28/2017 +18 days 🔍
03/30/2017 +2 days 🔍
09/05/2020 +1255 days 🔍

Sourcesinfo

Advisory: github.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-6802 (🔍)
GCVE (CVE): GCVE-0-2017-6802
GCVE (VulDB): GCVE-100-97816

OVAL: 🔍

OSVDB: - CVE-2017-6802 - ytnef - Buffer Over-Read Issue

See also: 🔍

Entryinfo

Created: 03/10/2017 15:23
Updated: 09/05/2020 21:32
Changes: 03/10/2017 15:23 (75), 09/05/2020 21:32 (4)
Complete: 🔍
Cache ID: 216::103

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