{"id":"UBUNTU-CVE-2021-28877","details":"In the standard library in Rust before 1.51.0, the Zip implementation calls __iterator_get_unchecked() for the same index more than once when nested. This bug can lead to a memory safety violation due to an unmet safety requirement for the TrustedRandomAccess trait.","modified":"2025-10-24T04:50:14Z","published":"2021-04-11T20:15:00Z","upstream":["CVE-2021-28877"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-28877"},{"type":"REPORT","url":"https://github.com/rust-lang/rust/pull/80670"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-28877"}],"affected":[{"package":{"name":"rustc","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/rustc@1.31.0+dfsg1+llvm-2ubuntu1~14.04.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.15.1+dfsg0-1~exp1ubuntu2~14.04.7","1.17.0+dfsg2-8~ubuntu0.14.04.3","1.21.0+dfsg1+llvm-0ubuntu3~14.04.5","1.22.1+dfsg1+llvm-0ubuntu2~14.04.2","1.24.1+dfsg1+llvm-0ubuntu1~14.04.1","1.25.0+dfsg1+llvm-0ubuntu1~14.04.1","1.28.0+dfsg1+llvm-0ubuntu1~14.04.1","1.30.0+dfsg1+llvm-2ubuntu1~14.04.1","1.31.0+dfsg1+llvm-2ubuntu1~14.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.31.0+dfsg1+llvm-2ubuntu1~14.04.1","binary_name":"libstd-rust-1.31"},{"binary_version":"1.31.0+dfsg1+llvm-2ubuntu1~14.04.1","binary_name":"libstd-rust-dev"},{"binary_version":"1.31.0+dfsg1+llvm-2ubuntu1~14.04.1","binary_name":"rust-gdb"},{"binary_version":"1.31.0+dfsg1+llvm-2ubuntu1~14.04.1","binary_name":"rust-lldb"},{"binary_version":"1.31.0+dfsg1+llvm-2ubuntu1~14.04.1","binary_name":"rust-src"},{"binary_version":"1.31.0+dfsg1+llvm-2ubuntu1~14.04.1","binary_name":"rustc"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-28877.json"}},{"package":{"name":"rustc","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/rustc@1.47.0+dfsg1+llvm-1ubuntu1~16.04.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.7.0+dfsg1-1","1.15.1+dfsg0-1~exp1ubuntu2~16.04.3","1.17.0+dfsg2-8~ubuntu0.16.04.2","1.21.0+dfsg1+llvm-0ubuntu3~16.04.1","1.22.1+dfsg1+llvm-0ubuntu2~16.04.2","1.24.1+dfsg1+llvm-0ubuntu1~16.04.1","1.25.0+dfsg1+llvm-0ubuntu1~16.04.1","1.28.0+dfsg1+llvm-0ubuntu1~16.04.1","1.30.0+dfsg1+llvm-2ubuntu1~16.04.1","1.31.0+dfsg1+llvm-2ubuntu1~16.04.1","1.32.0+dfsg1+llvm-1ubuntu1~16.04.1","1.34.1+dfsg2+llvm-0ubuntu1~16.04.1","1.35.0+dfsg0.1+llvm-0ubuntu1~16.04.1","1.36.0+dfsg1+llvm-2ubuntu1~16.04.1","1.37.0+dfsg1+llvm-1ubuntu1~16.04.1","1.39.0+dfsg1+llvm-3ubuntu1~16.04.1","1.41.0+dfsg1+llvm-0ubuntu1~16.04.1","1.43.0+dfsg1+llvm-1~exp1ubuntu2~16.04.1","1.47.0+dfsg1+llvm-1ubuntu1~16.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.47.0+dfsg1+llvm-1ubuntu1~16.04.1","binary_name":"libstd-rust-1.47"},{"binary_version":"1.47.0+dfsg1+llvm-1ubuntu1~16.04.1","binary_name":"libstd-rust-dev"},{"binary_version":"1.47.0+dfsg1+llvm-1ubuntu1~16.04.1","binary_name":"rust-gdb"},{"binary_version":"1.47.0+dfsg1+llvm-1ubuntu1~16.04.1","binary_name":"rust-lldb"},{"binary_version":"1.47.0+dfsg1+llvm-1ubuntu1~16.04.1","binary_name":"rust-src"},{"binary_version":"1.47.0+dfsg1+llvm-1ubuntu1~16.04.1","binary_name":"rustc"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-28877.json"}},{"package":{"name":"rustc","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/rustc@1.51.0+dfsg1+llvm-1~exp3ubuntu1~20.04.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.51.0+dfsg1+llvm-1~exp3ubuntu1~20.04.2"}]}],"versions":["1.37.0+dfsg1+llvm-1ubuntu1","1.38.0+dfsg0.2+llvm-0ubuntu1","1.38.0+dfsg0.2+llvm-0ubuntu2","1.39.0+dfsg1+llvm-3ubuntu1","1.40.0+dfsg1+llvm-5ubuntu1","1.41.0+dfsg1+llvm-0ubuntu1","1.41.0+dfsg1+llvm-0ubuntu2","1.43.0+dfsg1+llvm-1~exp1ubuntu1~20.04.1","1.47.0+dfsg1+llvm-1ubuntu1~20.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.51.0+dfsg1+llvm-1~exp3ubuntu1~20.04.2","binary_name":"libstd-rust-1.51"},{"binary_version":"1.51.0+dfsg1+llvm-1~exp3ubuntu1~20.04.2","binary_name":"libstd-rust-dev"},{"binary_version":"1.51.0+dfsg1+llvm-1~exp3ubuntu1~20.04.2","binary_name":"rust-gdb"},{"binary_version":"1.51.0+dfsg1+llvm-1~exp3ubuntu1~20.04.2","binary_name":"rust-lldb"},{"binary_version":"1.51.0+dfsg1+llvm-1~exp3ubuntu1~20.04.2","binary_name":"rust-src"},{"binary_version":"1.51.0+dfsg1+llvm-1~exp3ubuntu1~20.04.2","binary_name":"rustc"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-28877.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}