Deps.rs

tokio 1.0.1

[![dependency status](https://deps.rs/crate/tokio/1.0.1/status.svg)](https://deps.rs/crate/tokio/1.0.1)

This project might be open to known security vulnerabilities, which can be prevented by tightening the version range of affected dependencies. Find detailed information at the bottom.

Crate tokio

Dependencies

(12 total, 3 outdated, 1 possibly insecure)

CrateRequiredLatestStatus
 bytes^1.0.01.10.1up to date
 libc^0.2.420.2.174up to date
 memchr^2.22.7.5up to date
 mio ⚠️^0.7.61.0.4out of date
 num_cpus^1.8.01.17.0up to date
 once_cell^1.5.21.21.3up to date
 parking_lot^0.11.00.12.4out of date
 pin-project-lite^0.2.00.2.16up to date
 signal-hook-registry^1.1.11.4.5up to date
 tokio-macros^1.0.02.5.0out of date
 tracing^0.1.210.1.41up to date
 winapi^0.3.80.3.9up to date

Dev dependencies

(9 total, 3 outdated, 1 possibly insecure)

CrateRequiredLatestStatus
 async-stream^0.30.3.6up to date
 futures^0.3.00.3.31up to date
 libc^0.2.420.2.174up to date
 loom^0.40.7.2out of date
 nix ⚠️^0.19.00.30.1out of date
 proptest^0.10.01.7.0out of date
 tempfile^3.1.03.20.0up to date
 tokio-stream^0.10.1.17up to date
 tokio-test^0.4.00.4.4up to date

Security Vulnerabilities

nix: Out-of-bounds write in nix::unistd::getgrouplist

RUSTSEC-2021-0119

On certain platforms, if a user has more than 16 groups, the nix::unistd::getgrouplist function will call the libc getgrouplist function with a length parameter greater than the size of the buffer it provides, resulting in an out-of-bounds write and memory corruption.

The libc getgrouplist function takes an in/out parameter ngroups specifying the size of the group buffer. When the buffer is too small to hold all of the requested user's group memberships, some libc implementations, including glibc and Solaris libc, will modify ngroups to indicate the actual number of groups for the user, in addition to returning an error. The version of nix::unistd::getgrouplist in nix 0.16.0 and up will resize the buffer to twice its size, but will not read or modify the ngroups variable. Thus, if the user has more than twice as many groups as the initial buffer size of 8, the next call to getgrouplist will then write past the end of the buffer.

The issue would require editing /etc/groups to exploit, which is usually only editable by the root user.

mio: Tokens for named pipes may be delivered after deregistration

RUSTSEC-2024-0019

Impact

When using named pipes on Windows, mio will under some circumstances return invalid tokens that correspond to named pipes that have already been deregistered from the mio registry. The impact of this vulnerability depends on how mio is used. For some applications, invalid tokens may be ignored or cause a warning or a crash. On the other hand, for applications that store pointers in the tokens, this vulnerability may result in a use-after-free.

For users of Tokio, this vulnerability is serious and can result in a use-after-free in Tokio.

The vulnerability is Windows-specific, and can only happen if you are using named pipes. Other IO resources are not affected.

Affected versions

This vulnerability has been fixed in mio v0.8.11.

All versions of mio between v0.7.2 and v0.8.10 are vulnerable.

Tokio is vulnerable when you are using a vulnerable version of mio AND you are using at least Tokio v1.30.0. Versions of Tokio prior to v1.30.0 will ignore invalid tokens, so they are not vulnerable.

Workarounds

Vulnerable libraries that use mio can work around this issue by detecting and ignoring invalid tokens.

Technical details

When an IO resource registered with mio has a readiness event, mio delivers that readiness event to the user using a user-specified token. Mio guarantees that when an IO resource is deregistered, then it will never return the token for that IO resource again. However, for named pipes on windows, mio may sometimes deliver the token for a named pipe even though the named pipe has been previously deregistered.

This vulnerability was originally reported in the Tokio issue tracker: tokio-rs/tokio#6369
This vulnerability was fixed in: tokio-rs/mio#1760

Thank you to @rofoun and @radekvit for discovering and reporting this issue.