GHSA-3m6f-3gfg-4x56

Source

https://github.com/advisories/GHSA-3m6f-3gfg-4x56

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/06/GHSA-3m6f-3gfg-4x56/GHSA-3m6f-3gfg-4x56.json

Aliases

• CVE-2021-45711
• GHSA-g4h2-4wvh-grc5
• RUSTSEC-2021-0125

Published

2022-06-17T00:19:49Z

Modified

2023-11-08T04:07:23.302312Z

Details

Version 0.6.0 of the simple_asn1 crate panics on certain malformed inputs to its parsing functions, including from_der and der_decode. Because this crate is frequently used with inputs from the network, this should be considered a security vulnerability.

The issue occurs when parsing the old ASN.1 "UTCTime" time format. If an attacker provides a UTCTime where the first character is ASCII but the second character is above 0x7f, a string slice operation in the from_der_ function will try to slice into the middle of a UTF-8 character, and cause a panic.

This error was introduced in commit d7d39d709577710e9dc8, which updated simple_asn1 to use time instead of chrono because of RUSTSEC-2020-159. Versions of simple_asn1 before 0.6.0 are not affected by this issue.

The patch was applied in simple_asn1 version 0.6.1.

References

• https://github.com/acw/simple_asn1/issues/27
• https://github.com/acw/simple_asn1/commit/d7d39d709577710e9dc8833ee57d200eef366db8
• https://github.com/acw/simple_asn1
• https://rustsec.org/advisories/RUSTSEC-2021-0125.html