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CVE-2021-28878

Published: 11 April 2021

In the standard library in Rust before 1.52.0, the Zip implementation calls __iterator_get_unchecked() more than once for the same index (under certain conditions) when next_back() and next() are used together. This bug could lead to a memory safety violation due to an unmet safety requirement for the TrustedRandomAccess trait.

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
rustc
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(1.53.0+dfsg1+llvm-4ubuntu1~18.04.1)
focal
Released (1.53.0+dfsg1+llvm-4ubuntu1~20.04.1)
groovy Ignored
(end of life)
hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy
Released (1.53.0+dfsg1+llvm-4ubuntu1)
kinetic Ignored
(end of life, was needed)
lunar Not vulnerable
(1.61.0+dfsg1-1~exp1ubuntu1)
mantic Not vulnerable
(1.67.1+dfsg0ubuntu1-0ubuntu2)
noble Not vulnerable
(1.67.1+dfsg0ubuntu1-0ubuntu2)
trusty Needed

upstream
Released (1.52.0)
xenial Needed

Severity score breakdown

Parameter Value
Base score 7.5
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H