CVE-2019-14877

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.

CVSS v3 6.5 MEDIUM
CVSS v2.0 4.0 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:N/I:N/A:P

Exploitability : 8.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://census-labs.com/news/2020/01/31/multiple-null-pointer-dereference-vulnerabilities-in-newlib/	Exploit Third Party Advisory
https://census-labs.com/news/2020/01/31/multiple-null-pointer-dereference-vulnerabilities-in-newlib/	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:newlib_project:newlib:*:*:*:*:*:*:*:*

History

21 Nov 2024, 04:27

Type	Values Removed	Values Added
References	~~() https://census-labs.com/news/2020/01/31/multiple-null-pointer-dereference-vulnerabilities-in-newlib/ - Exploit, Third Party Advisory~~	() https://census-labs.com/news/2020/01/31/multiple-null-pointer-dereference-vulnerabilities-in-newlib/ - Exploit, Third Party Advisory

Information

Published : 2020-03-19 16:15

Updated : 2024-11-21 04:27

NVD link : CVE-2019-14877

Mitre link : CVE-2019-14877

CVE.ORG link : CVE-2019-14877

JSON object : View

Products Affected

newlib_project

newlib

CWE

CWE-476

NULL Pointer Dereference

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