USN-5291-1

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USN-5291-1

Summary: libarchive vulnerabilities

Details: It was discovered that libarchive incorrectly handled symlinks. If a user or automated system were tricked into processing a specially crafted archive, an attacker could possibly use this issue to change modes, times, ACLs, and flags on arbitrary files. (CVE-2021-23177, CVE-2021-31566) It was discovered that libarchive incorrectly handled certain RAR archives. If a user or automated system were tricked into processing a specially crafted RAR archive, an attacker could use this issue to cause libarchive to crash, resulting in a denial of service, or possibly execute arbitrary code. (CVE-2021-36976)

References: https://ubuntu.com/security/notices/USN-5291-1, https://ubuntu.com/security/CVE-2021-23177, https://ubuntu.com/security/CVE-2021-31566, https://ubuntu.com/security/CVE-2021-36976