CVE-2021-28878: Buffer Overflow
First published: Sun Apr 11 2021(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Rust-lang Rust | <1.52.0 | |
| Fedoraproject Fedora | =32 | |
| Fedoraproject Fedora | =33 | |
| Fedoraproject Fedora | =34 |
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Reference Links
- https://github.com/rust-lang/rust/issues/82291
- https://github.com/rust-lang/rust/pull/82292
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TFUO3URYCO73D2Q4WYJBWAMJWGGVXQO4/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VZG65GUW6Z2CYOQHF7T3TB5CZKIX6ZJE/
- https://security.gentoo.org/glsa/202210-09
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZG65GUW6Z2CYOQHF7T3TB5CZKIX6ZJE/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFUO3URYCO73D2Q4WYJBWAMJWGGVXQO4/
Frequently Asked Questions
What is CVE-2021-28878?
CVE-2021-28878 is a vulnerability in the standard library in Rust before 1.52.0 that can lead to a memory safety violation.
How severe is CVE-2021-28878?
CVE-2021-28878 has a severity rating of 7.5, which is considered high.
Which software versions are affected by CVE-2021-28878?
Rust versions before 1.52.0 and Fedora versions 32, 33, and 34 are affected by CVE-2021-28878.
How can I fix CVE-2021-28878?
To fix CVE-2021-28878, update Rust to version 1.52.0 or later.
Where can I find more information about CVE-2021-28878?
You can find more information about CVE-2021-28878 in the references provided: https://github.com/rust-lang/rust/issues/82291, https://github.com/rust-lang/rust/pull/82292, https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5/
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