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CVE-2016-9840

Description

A vulnerability was discovered in the inftrees.c file of zlib. Pointer arithmetic operations violate the C standard by subtracting an offset from an array pointer before its allocated memory, leading to undefined behavior.

Statement

While this undefined behavior does not currently manifest as an exploitable issue on Red Hat Enterprise Linux systems using GCC compilers, it could become problematic with future compiler implementations. This flaw affects various Java packages in Red Hat Enterprise Linux 6 and 7, but native zlib packages in Red Hat Enterprise Linux are not impacted due to the specific compiler implementation used.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v3 Score Breakdown

Red HatNVDcve.org
Base Score8.88.8N/A
Attack VectorNetworkNetworkN/A
Attack ComplexityLowLowN/A
Privileges RequiredNoneNoneN/A
User InteractionRequiredRequiredN/A
ScopeUnchangedUnchangedN/A
ConfidentialityHighHighN/A
Integrity ImpactHighHighN/A
Availability ImpactHighHighN/A

Vector

Red Hat: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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