unrar-free 0.0.1 unrarlib.c DecodeNumber null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.0$0-$5k0.00

Summaryinfo

A vulnerability was found in unrar-free 0.0.1. It has been rated as problematic. This issue affects the function DecodeNumber in the library unrarlib.c. This manipulation causes null pointer dereference. The identification of this vulnerability is CVE-2017-14121. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in unrar-free 0.0.1. It has been declared as problematic. Affected by this vulnerability is the function DecodeNumber in the library unrarlib.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

The DecodeNumber function in unrarlib.c in unrar 0.0.1 (aka unrar-free or unrar-gpl) suffers from a NULL pointer dereference flaw triggered by a specially crafted RAR archive.

The bug was discovered 08/20/2017. The weakness was shared 09/03/2017 (Website). It is possible to read the advisory at openwall.com. This vulnerability is known as CVE-2017-14121 since 09/03/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 14 days. During that time the estimated underground price was around $0-$5k.

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

The entries VDB-106098 and VDB-106100 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 6.0

VulDB Base Score: 4.3
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔍

CVSSv2info

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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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/20/2017 🔍
09/03/2017 +14 days 🔍
09/03/2017 +0 days 🔍
09/03/2017 +0 days 🔍
09/04/2017 +1 days 🔍
12/27/2022 +1940 days 🔍

Sourcesinfo

Advisory: DLA 2567-1
Status: Not defined

CVE: CVE-2017-14121 (🔍)
GCVE (CVE): GCVE-0-2017-14121
GCVE (VulDB): GCVE-100-106099
See also: 🔍

Entryinfo

Created: 09/04/2017 09:04
Updated: 12/27/2022 16:25
Changes: 09/04/2017 09:04 (51), 11/12/2019 19:42 (7), 12/27/2022 16:25 (3)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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