{"id":"UBUNTU-CVE-2018-20452","details":"The read_MSAT_body function in ole.c in libxls 1.4.0 has an invalid free that allows attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a crafted file, because of inconsistent memory management (new versus free) in ole2_read_header in ole.c.","modified":"2026-05-20T16:06:11.588854043Z","published":"2018-12-25T17:29:00Z","upstream":["CVE-2018-20452"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-20452"},{"type":"REPORT","url":"https://github.com/evanmiller/libxls/issues/35"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-20452"}],"affected":[{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.1.0-1"],"ecosystem_specific":{"binaries":[{"binary_version":"0.1.0-1","binary_name":"r-cran-readxl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20452.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.0.0-1build1","1.0.0-2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.0.0-2","binary_name":"r-cran-readxl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20452.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.1-2","1.3.1-2build1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.3.1-2build1","binary_name":"r-cran-readxl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20452.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.3.1-2build2"],"ecosystem_specific":{"binaries":[{"binary_version":"1.3.1-2build2","binary_name":"r-cran-readxl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20452.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.3-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.3-1","binary_name":"r-cran-readxl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20452.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.5-1","binary_name":"r-cran-readxl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20452.json"}},{"package":{"name":"r-cran-readxl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/r-cran-readxl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.5-1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.5-1","binary_name":"r-cran-readxl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-20452.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}