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libarchive

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libarchive is an open-source library that provides support for reading and writing various archive formats, including RAR, 7z, WARC, and ustar/PAX. On WindowsForum.com, discussions cover security vulnerabilities found in libarchive, such as CVE-2025-5916 (integer overflow in WARC reader), CVE-2025-5917 (off-by-one in ustar/PAX handling), and CVE-2024-43495 (remote code execution). A logic error in the RAR5 decoder can cause infinite loops. Microsoft's integration of libarchive into Windows 11 via update KB5031455 expanded native compression support but also introduced security risks. Azure Linux is noted as affected by certain CVEs. Topics include patch strategies, mitigation, and the implications of libarchive's use in enterprise and consumer Windows environments.
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    Fix for libarchive RAR5 Infinite Loop: Patch and Mitigation Strategies

    A logic error in libarchive’s RAR5 decoder can be driven into an infinite loop when a specially crafted RAR5 archive contains a trailing compressed block that produces no output; the loop occurs inside the RAR5 read path and can hang processes that call archive_read_data(), producing a...
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    CVE-2025-5916: Mitigating libarchive WARC Overflow in Azure Linux

    A recently disclosed vulnerability in the libarchive library — tracked as CVE‑2025‑5916 — exposes an integer overflow in the WARC reader that can be triggered by a crafted Web ARChive (WARC) file, and Microsoft’s public advisory explicitly says Azure Linux includes the affected open‑source...
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    • azure linux csaf vex attestations cve 2025 5916 libarchive
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    • Forum: Security Alerts
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    CVE-2025-5917: Azure Linux Attestation, Not a Universal Microsoft Guarantee

    Microsoft’s public advisory around CVE‑2025‑5917 correctly narrows the company’s validated scope to its Azure Linux distribution for this particular libarchive flaw, but that attestation is a statement of what Microsoft has finished inventorying — not a technical guarantee that no other...
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    Windows 11's Major Update: New Compression Formats and Security Challenges

    Microsoft’s latest major update for Windows 11 (KB5031455) has introduced native support for 11 new compression formats within File Explorer, expanding the system's file management capabilities to include popular formats such as RAR and 7z. While this update is a boon for those who manage...
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    • compression cve vulnerabilities libarchive security risks windows 11
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    • Forum: Windows News
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    Windows 11 KB5031455 Update: New Compression Features and Security Risks

    Microsoft’s ongoing quest to refine the Windows 11 user experience just got even more interesting—and a bit more concerning. With the KB5031455 update, Windows 11 users now enjoy native support for a wide variety of compressed archive formats. What might seem like a pure win for convenience...
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    • compression kb5031455 libarchive security risks windows 11
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    • Forum: Windows News
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    CVE-2024-43495: Analyzing Libarchive's Remote Code Execution Threat

    Understanding the CVE-2024-43495 Vulnerability: A Deep Dive into the Libarchive Remote Code Execution Risk In the ever-evolving realm of cybersecurity, vulnerabilities like CVE-2024-43495 highlight the intricate dance between software development and security management. Published on September...
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    • cve-2024-43495 cybersecurity risks libarchive remote code execution windows security
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    • Forum: Security Alerts
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