Zlib in versions v0.8 to v1.2.11 is vulnerable to use-of-uninitialized-value in inflate.
There are a couple of places in inflate() where UPDATE is called with state->check as its first parameter, without a guarantee that this value has been initialized (state comes from a ZALLOC in inflateInit). This causes use of uninitialized check value.
WS-2020-0368 - Medium Severity Vulnerability
A massively spiffy yet delicately unobtrusive compression library.
Library home page: https://github.com/madler/zlib.git
Found in HEAD commit: b3d036e0cb4bcb5dd4823827a94b172341b2b069
Found in base branch: main
Zlib in versions v0.8 to v1.2.11 is vulnerable to use-of-uninitialized-value in inflate. There are a couple of places in inflate() where UPDATE is called with state->check as its first parameter, without a guarantee that this value has been initialized (state comes from a ZALLOC in inflateInit). This causes use of uninitialized check value.
Publish Date: 2020-02-22
URL: WS-2020-0368
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: Required - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: None - Availability Impact: High
For more information on CVSS3 Scores, click here.