RUSTSEC-2020-0071: Potential segfault in the time crate

[github-actions]

Potential segfault in the time crate

Details
Package	time
Version	0.1.43
URL	time-rs/time#293
Date	2020-11-18
Patched versions	>=0.2.23
Unaffected versions	=0.2.0,=0.2.1,=0.2.2,=0.2.3,=0.2.4,=0.2.5,=0.2.6

Impact

Unix-like operating systems may segfault due to dereferencing a dangling pointer in specific circumstances. This requires an environment variable to be set in a different thread than the affected functions. This may occur without the user's knowledge, notably in a third-party library.

The affected functions from time 0.2.7 through 0.2.22 are:

• time::UtcOffset::local_offset_at
• time::UtcOffset::try_local_offset_at
• time::UtcOffset::current_local_offset
• time::UtcOffset::try_current_local_offset
• time::OffsetDateTime::now_local
• time::OffsetDateTime::try_now_local

The affected functions in time 0.1 (all versions) are:

• at
• at_utc
• now

Non-Unix targets (including Windows and wasm) are unaffected.

Patches

Pending a proper fix, the internal method that determines the local offset has been modified to always return None on the affected operating systems. This has the effect of returning an Err on the try_* methods and UTC on the non-try_* methods.

Users and library authors with time in their dependency tree should perform cargo update, which will pull in the updated, unaffected code.

Users of time 0.1 do not have a patch and should upgrade to an unaffected version: time 0.2.23 or greater or the 0.3 series.

Workarounds

No workarounds are known.

References

time-rs/time#293

See advisory page for additional details.

[sksat]

time v0.1.43を使ってるのはchrono v0.4.19(をcloudflareが使ってる)

[sksat]

chrono v0.4.19は最新かあ

[sksat]

• Bump time to 0.3 chronotope/chrono#578
  これがマージされるのを待つしかないかなあ．でもこの人chronoにtimeを0.2に上げるMRも送ってるけどそれもマージされてないし時間かかるかもしれんな．

[sksat]

MR読んできた．
なるほどchronoはRust 1.13とかでも動いてほしいという気持ち(現状明示はされていない)があって，そこらへんtimeと合ってるわけでもないしどうするとなっている．

で，この機会にMSRV(Minimum Supported Rust Version)をちゃんとするか〜という話になりそうな気配がある．これは6ヶ月でいいのでは？ともなっている

[sksat]

rustyhorde/vergen@dc2430f
そうか？まあそうかもしれんな

[sksat]

chronoくん息してるかこれ？