Medium: rust

Issue Overview:

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. (CVE-2020-36323)

In the standard library in Rust before 1.52.0, the Zip implementation has a panic safety issue. It calls __iterator_get_unchecked() more than once for the same index when the underlying iterator panics (in certain conditions). This bug could lead to a memory safety violation due to an unmet safety requirement for the TrustedRandomAccess trait. (CVE-2021-28876)

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. (CVE-2021-28878)

In the standard library in Rust before 1.52.0, the Zip implementation can report an incorrect size due to an integer overflow. This bug can lead to a buffer overflow when a consumed Zip iterator is used again. (CVE-2021-28879)

In the standard library in Rust before 1.52.0, a double free can occur in the Vec::from_iter function if freeing the element panics. (CVE-2021-31162)

Affected Packages:

rust

Note:

This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.

Issue Correction:
Run yum update rust to update your system.

New Packages:

aarch64:  
    rust-1.56.1-1.amzn2.0.1.aarch64  
    rust-std-static-1.56.1-1.amzn2.0.1.aarch64  
    rust-doc-1.56.1-1.amzn2.0.1.aarch64  
    cargo-1.56.1-1.amzn2.0.1.aarch64  
    rustfmt-1.56.1-1.amzn2.0.1.aarch64  
    rls-1.56.1-1.amzn2.0.1.aarch64  
    clippy-1.56.1-1.amzn2.0.1.aarch64  
    rust-analysis-1.56.1-1.amzn2.0.1.aarch64  
    rust-debuginfo-1.56.1-1.amzn2.0.1.aarch64  
  
noarch:  
    rust-debugger-common-1.56.1-1.amzn2.0.1.noarch  
    rust-gdb-1.56.1-1.amzn2.0.1.noarch  
    cargo-doc-1.56.1-1.amzn2.0.1.noarch  
    rust-src-1.56.1-1.amzn2.0.1.noarch  
  
src:  
    rust-1.56.1-1.amzn2.0.1.src  
  
x86_64:  
    rust-1.56.1-1.amzn2.0.1.x86_64  
    rust-std-static-1.56.1-1.amzn2.0.1.x86_64  
    rust-doc-1.56.1-1.amzn2.0.1.x86_64  
    cargo-1.56.1-1.amzn2.0.1.x86_64  
    rustfmt-1.56.1-1.amzn2.0.1.x86_64  
    rls-1.56.1-1.amzn2.0.1.x86_64  
    clippy-1.56.1-1.amzn2.0.1.x86_64  
    rust-analysis-1.56.1-1.amzn2.0.1.x86_64  
    rust-debuginfo-1.56.1-1.amzn2.0.1.x86_64  

Additional References

Red Hat: CVE-2020-36323, CVE-2021-28876, CVE-2021-28878, CVE-2021-28879, CVE-2021-31162

Mitre: CVE-2020-36323, CVE-2021-28876, CVE-2021-28878, CVE-2021-28879, CVE-2021-31162