Vulnerability Monitor

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CVE-2020-36323

In the standard library in Rust before 1.52.0, there is an optimization for joining strings that can cause uninitialized bytes to be exposed (or the program to crash) if the borrowed string changes after its length is checked.

Published

2021-04-14T07:15:12.087

Last Modified

2024-11-21T05:29:16.753

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 8.2 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:N/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: NONE
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

4.9

Weaknesses

Type: Primary
CWE-134

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	rust-lang	rust	< 1.52.0	Yes
Operating System	fedoraproject	fedora	32	Yes
Operating System	fedoraproject	fedora	33	Yes
Operating System	fedoraproject	fedora	34	Yes

References

https://github.com/rust-lang/rust/issues/80335 Patch, Third Party Advisory ([email protected])
https://github.com/rust-lang/rust/pull/81728 Patch, Third Party Advisory ([email protected])
https://github.com/rust-lang/rust/pull/81728#issuecomment-821549174 Patch, Third Party Advisory ([email protected])
https://github.com/rust-lang/rust/pull/81728#issuecomment-824904190 Patch, Third Party Advisory ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFUO3URYCO73D2Q4WYJBWAMJWGGVXQO4/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZG65GUW6Z2CYOQHF7T3TB5CZKIX6ZJE/ ([email protected])
https://github.com/rust-lang/rust/issues/80335 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/rust-lang/rust/pull/81728 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/rust-lang/rust/pull/81728#issuecomment-821549174 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://github.com/rust-lang/rust/pull/81728#issuecomment-824904190 Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFUO3URYCO73D2Q4WYJBWAMJWGGVXQO4/ (af854a3a-2127-422b-91ae-364da2661108)
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZG65GUW6Z2CYOQHF7T3TB5CZKIX6ZJE/ (af854a3a-2127-422b-91ae-364da2661108)