WS-2020-0368 (Medium) detected in libz-sys-1.0.25.crate

[mend-bolt-for-github]

WS-2020-0368 - Medium Severity Vulnerability

Vulnerable Library - libz-sys-1.0.25.crate

Bindings to the system libz library (also known as zlib).

Library home page: https://crates.io/api/v1/crates/libz-sys/1.0.25/download

Path to dependency file: /third_party/rust_crates/vendor/flate2/Cargo.toml

Path to vulnerable library: /third_party/rust_crates/vendor/flate2/Cargo.toml,/third_party/rust_crates/vendor/zip/Cargo.toml

Dependency Hierarchy:

• ❌ libz-sys-1.0.25.crate (Vulnerable Library)

Found in HEAD commit: 4ec0c406a28f193fe6e7376ee7696cca0532d4ba

Found in base branch: master

Vulnerability Details

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

CVSS 3 Score Details (6.5)

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.

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