libgit2 up to 0.24.2 Object File commit.c git_oid_nfmt null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.3$0-$5k0.00

Summaryinfo

A vulnerability was found in libgit2 up to 0.24.2. It has been classified as problematic. Affected is the function git_oid_nfmt of the file commit.c of the component Object File Handler. This manipulation causes null pointer dereference. This vulnerability is registered as CVE-2016-8569. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in libgit2 up to 0.24.2. Affected by this vulnerability is the function git_oid_nfmt of the file commit.c of the component Object File Handler. 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 git_oid_nfmt function in commit.c in libgit2 before 0.24.3 allows remote attackers to cause a denial of service (NULL pointer dereference) via a cat-file command with a crafted object file.

The bug was discovered 10/08/2016. The weakness was published 02/03/2017 by Gustavo Grieco (Website). It is possible to read the advisory at lists.opensuse.org. This vulnerability is known as CVE-2016-8569 since 10/08/2016. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 65 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 95756 (openSUSE Security Update : libgit2 (openSUSE-2016-1450)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 169407 (SUSE Enterprise Linux Security Update for libgit2 (SUSE-SU-2016:2969-1)).

Upgrading to version 0.24.3 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 databases at Tenable (95756) and SecurityFocus (BID 93465†). Similar entry is available at VDB-96534. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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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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Nessus ID: 95756
Nessus Name: openSUSE Security Update : libgit2 (openSUSE-2016-1450)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 866198
OpenVAS Name: Fedora Update for libgit2 FEDORA-2016-505d7fe198
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
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Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libgit2 0.24.3

Timelineinfo

10/08/2016 🔍
10/08/2016 +0 days 🔍
10/08/2016 +0 days 🔍
12/12/2016 +65 days 🔍
12/13/2016 +1 days 🔍
02/03/2017 +52 days 🔍
02/03/2017 +0 days 🔍
02/03/2017 +0 days 🔍
11/11/2022 +2107 days 🔍

Sourcesinfo

Advisory: FEDORA-2016-505d7fe198
Researcher: Gustavo Grieco
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-8569 (🔍)
GCVE (CVE): GCVE-0-2016-8569
GCVE (VulDB): GCVE-100-96535
SecurityFocus: 93465 - libgit2 CVE-2016-8569 Null Pointer Dereference Denial of Service Vulnerability
OSVDB: - CVE-2016-8569 - libgit2 - Denial of Service Issue

See also: 🔍

Entryinfo

Created: 02/03/2017 19:50
Updated: 11/11/2022 15:02
Changes: 02/03/2017 19:50 (74), 08/11/2020 07:15 (8), 11/11/2022 15:02 (5)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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