lrzip 0.631 stream.c join_pthread null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in lrzip 0.631. It has been rated as problematic. This issue affects the function join_pthread of the file stream.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. The summary by CVE is:

The join_pthread function in stream.c in in lrzip 0.631 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted archive.

The bug was discovered 05/07/2017. The weakness was presented 05/08/2017 (Website). It is possible to read the advisory at The identification of this vulnerability is CVE-2017-8843 since 05/08/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 1 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.




CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.3
VulDB Temp Score: 3.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
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Class: Null pointer dereference
CWE: CWE-476 / CWE-404

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

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Current Price Estimation: 🔍


Threat Intelligenceinfo

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


Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍


05/07/2017 🔍
05/08/2017 +1 days 🔍
05/08/2017 +0 days 🔍
05/08/2017 +0 days 🔍
05/09/2017 +1 days 🔍
12/06/2022 +2037 days 🔍


Advisory: 69
Status: Not defined

CVE: CVE-2017-8843 (🔍)
OSVDB: - CVE-2017-8843 - Lrzip Project - Lrzip - Medium


Created: 05/09/2017 08:35 AM
Updated: 12/06/2022 08:30 AM
Changes: 05/09/2017 08:35 AM (51), 09/24/2020 04:29 PM (8), 12/06/2022 08:30 AM (3)
Complete: 🔍
Cache ID: 100:562:40


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