VDB-103364 · CVE-2017-11124 · GCVE-0-2017-11124

xar 1.6.1 archive.c xar_unserialize null pointer dereference

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.
7.5	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in xar 1.6.1. This affects the function xar_unserialize of the file archive.c. Such manipulation leads to null pointer dereference. This vulnerability is traded as CVE-2017-11124. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in xar 1.6.1. It has been rated as problematic. Affected by this issue is the function xar_unserialize of the file archive.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. CVE summarizes:

libxar.so in xar 1.6.1 has a NULL pointer dereference in the xar_unserialize function in archive.c.

The bug was discovered 06/28/2017. The weakness was shared 07/10/2017 (Website). The advisory is shared for download at blogs.gentoo.org. This vulnerability is handled as CVE-2017-11124 since 07/09/2017. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 11 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 entry VDB-103365 is related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

1.6.1

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.6

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

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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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: No
Local: No
Remote: Yes

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

06/28/2017 🔍
07/09/2017 +11 days 🔍
07/09/2017 +0 days 🔍
07/10/2017 +1 days 🔍
07/10/2017 +0 days 🔍
12/12/2022 +1981 days 🔍

Sourcesinfo

Advisory: FEDORA-2020-bbd24dd0cf
Status: Not defined

CVE: CVE-2017-11124 (🔍)
GCVE (CVE): GCVE-0-2017-11124
GCVE (VulDB): GCVE-100-103364
See also: 🔍

Entryinfo

Created: 07/10/2017 09:28
Updated: 12/12/2022 09:05
Changes: 07/10/2017 09:28 (57), 10/24/2019 14:44 (1), 12/12/2022 09:05 (3)
Complete: 🔍
Cache ID: 216::103