VDB-95531 · CVE-2016-9844 · BID 94728

Info-ZIP UnZIP 6.0 Compression Method zipinfo.c zi_short memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

A vulnerability was found in Info-ZIP UnZIP 6.0 and classified as critical. This issue affects the function zi_short of the file zipinfo.c of the component Compression Method Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Buffer overflow in the zi_short function in zipinfo.c in Info-Zip UnZip 6.0 allows remote attackers to cause a denial of service (crash) via a large compression method value in the central directory file header.

The bug was discovered 12/05/2016. The weakness was released 01/18/2017 by Alex (Website). It is possible to read the advisory at openwall.com. The identification of this vulnerability is CVE-2016-9844 since 12/05/2016. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. 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 44 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 900032 , which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 171621 (SUSE Enterprise Linux Security Update for unzip (SUSE-SU-2018:2978-1)).

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

The vulnerability is also documented in the vulnerability database at Tenable (900032). Entries connected to this vulnerability are available at 73897, 78975, 78976 and 95463.

Productinfo

Vendor

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
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CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.7

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

NVD Base Score: 4.0
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 900032
Nessus File: 🔍

OpenVAS ID: 71960
OpenVAS Name: Fedora Update for unzip FEDORA-2016-3b4de2babd
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/05/2016 🔍
12/05/2016 +0 days 🔍
12/05/2016 +0 days 🔍
01/18/2017 +44 days 🔍
01/18/2017 +0 days 🔍
01/19/2017 +1 days 🔍
01/19/2017 +0 days 🔍

Sourcesinfo

Advisory: openwall.com
Researcher: Alex
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-9844 (🔍)
SecurityFocus: 94728 - Info-ZIP UnZip 'zipinfo.c' Heap Buffer Overflow Vulnerability
OSVDB: - CVE-2016-9844 - Info-Zip - Unzip - Buffer Overflow Issue

See also: 🔍

Entryinfo

Created: 01/19/2017 09:47
Changes: 01/19/2017 09:47 (75)
Complete: 🔍

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