RUSTSEC-2021-0125

Source

https://rustsec.org/advisories/RUSTSEC-2021-0125

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2021-0125.json

Aliases

Published

2021-11-14T12:00:00Z

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

Affected packages

crates.io / simple_asn1

Package

Name: simple_asn1

Affected ranges

Type: SEMVER
Events: Introduced

0.6.0

Fixed

0.6.1

Ecosystem specific

{
    "affects": {
        "os": [],
        "functions": [],
        "arch": []
    }
}

Database specific

{
    "cvss": null,
    "informational": null,
    "categories": [
        "denial-of-service"
    ]
}