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github-actions[bot] 1d7066d6d1 Assigned RUSTSEC-2020-0071 to time (#486 )

Co-authored-by: tarcieri <tarcieri@users.noreply.github.com>

2020-11-18 18:21:00 -08:00

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[advisory]
id = "RUSTSEC-2020-0071"
package = "time"
date = "2020-11-18"
url = "https://github.com/time-rs/time/issues/293"
categories = ["code-execution", "memory-corruption"]
cvss = "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
keywords = ["segfault"]
aliases = ["CVE-2020-26235"]

[affected]
# any Unix-like OS
os = [
    "linux",
    "Redox",
    "rolaris",
    "android",
    "ios",
    "macos",
    "netbsd",
    "openbsd",
    "bitrig",
    "freebsd",
]
[affected.functions]
"time::UtcOffset::local_offset_at" = ["< 0.2.23"]
"time::UtcOffset::try_local_offset_at" = ["< 0.2.23"]
"time::UtcOffset::current_local_offset" = ["< 0.2.23"]
"time::UtcOffset::try_current_local_offset" = ["< 0.2.23"]
"time::OffsetDateTime::now_local" = ["< 0.2.23"]
"time::OffsetDateTime::try_now_local" = ["< 0.2.23"]

[versions]
patched = [">= 0.2.23"]
unaffected = ["< 0.2.7"]

Potential segfault in the time crate

Impact

Unix-like operating systems may segfault due to dereferencing a dangling pointer in specific circumstances. This requires the user to set any environment variable in a different thread than the affected functions.

The affected functions 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

Non-Unix targets are unaffected. This includes Windows and wasm.

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 a the updated, unaffected code.

Workarounds

No workarounds are known.

References

#293

1.9 KiB Raw Blame History