zlib zlib CVE-2018-25032 vulnerability in Zlib and Other Products
Published on March 25, 2022

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zlib before 1.2.12 allows memory corruption when deflating (i.e., when compressing) if the input has many distant matches.

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Vulnerability Analysis

CVE-2018-25032 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. An automatable proof of concept (POC) exploit exists. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Type

What is a Memory Corruption Vulnerability?

The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.

CVE-2018-25032 has been classified to as a Memory Corruption vulnerability or weakness.


Products Associated with CVE-2018-25032

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Vulnerable Packages

The following package name and versions may be associated with CVE-2018-25032

Package Manager Vulnerable Package Versions Fixed In
rubygems nokogiri < 1.13.4 1.13.4
composer privatebin/privatebin >= 0.21, < 1.4.0 1.4.0

Exploit Probability

EPSS
0.11%
Percentile
28.92%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.