libbsd up to 0.8.1 fgetwln memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.4$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in libbsd up to 0.8.1. This impacts the function fgetwln. Performing a manipulation results in memory corruption. This vulnerability was named CVE-2016-2090. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in libbsd up to 0.8.1. This affects the function fgetwln. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as 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. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Off-by-one vulnerability in the fgetwln function in libbsd before 0.8.2 allows attackers to have unspecified impact via unknown vectors, which trigger a heap-based buffer overflow.

The bug was discovered 01/27/2016. The weakness was presented 01/13/2017 (Website). The advisory is shared at openwall.com. This vulnerability is uniquely identified as CVE-2016-2090 since 01/28/2016. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available.

The vulnerability was handled as a non-public zero-day exploit for at least 175 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 92483 (GLSA-201607-13 : libbsd: Arbitrary code execution), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Gentoo Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 276357 (Fedora Security Update for libbsd (FEDORA-2016-d3e562bb52)).

Upgrading to version 0.8.2 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (92483). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.4

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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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: 92483
Nessus Name: GLSA-201607-13 : libbsd: Arbitrary code execution
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 867773
OpenVAS Name: Fedora Update for libbsd FEDORA-2016-d3e562bb52
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libbsd 0.8.2
Patch: cgit.freedesktop.org

Timelineinfo

01/27/2016 🔍
01/28/2016 +1 days 🔍
07/20/2016 +174 days 🔍
07/21/2016 +1 days 🔍
01/13/2017 +176 days 🔍
01/13/2017 +0 days 🔍
01/15/2017 +2 days 🔍
10/11/2024 +2826 days 🔍

Sourcesinfo

Advisory: USN-4243-1
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-2090 (🔍)
GCVE (CVE): GCVE-0-2016-2090
GCVE (VulDB): GCVE-100-95313
OSVDB: - CVE-2016-2090 - libbsd - Off-by-One Issue

Entryinfo

Created: 01/15/2017 10:37
Updated: 10/11/2024 07:48
Changes: 01/15/2017 10:37 (67), 07/21/2020 16:22 (5), 10/28/2022 15:51 (4), 10/11/2024 07:48 (16)
Complete: 🔍
Cache ID: 216:C05:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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