Newlib libc Library up to 3.2.x mprec.c __mdiff null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Newlib libc Library up to 3.2.x. This issue affects the function __mdiff in the library newlib/libc/stdlib/mprec.c. The manipulation leads to null pointer dereference. This vulnerability is traded as CVE-2019-14877. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Newlib libc Library up to 3.2.x (Software Library). This issue affects the function __mdiff in the library newlib/libc/stdlib/mprec.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:

In the __mdiff function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocate big integers, however no check is performed to verify if the allocation succeeded or not. The access to _wds and _sign will trigger a null pointer dereference bug in case of a memory allocation failure.

The weakness was shared 03/19/2020 (Website). It is possible to read the advisory at census-labs.com. The identification of this vulnerability is CVE-2019-14877 since 08/10/2019. The attack may be initiated remotely. The successful exploitation needs a simple authentication. Technical details of the vulnerability are known, but there is no available exploit.

Upgrading to version 3.3.0 eliminates this vulnerability.

The entries VDB-151814, VDB-151854, VDB-151855 and VDB-151856 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Vendor

Name

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: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

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: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libc Library 3.3.0

Timelineinfo

08/10/2019 🔍
03/19/2020 +222 days 🔍
03/20/2020 +1 days 🔍
03/20/2020 +0 days 🔍

Sourcesinfo

Advisory: census-labs.com
Status: Not defined

CVE: CVE-2019-14877 (🔍)
GCVE (CVE): GCVE-0-2019-14877
GCVE (VulDB): GCVE-100-151859
See also: 🔍

Entryinfo

Created: 03/20/2020 07:47
Updated: 03/20/2020 07:52
Changes: 03/20/2020 07:47 (41), 03/20/2020 07:52 (12)
Complete: 🔍
Cache ID: 216::103

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