CVE-2021-26305: Cdr Read Of Uninitialized Memory Vulnerability
CRITICALCVE-2021-26305 is a CRITICAL (CVSS 9.8) read of uninitialized memory vulnerability (CWE-908: Use of Uninitialized Resource) affecting Cdr libraries in the crates.io ecosystem. The issue involves read of uninitialized memory in cdr. Remediation is available by upgrading affected packages to version 0.2.4.
CVE-2021-26305 at a Glance
Security Impact
CVSS: 9.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
How to Fix CVE-2021-26305
To remediate this vulnerability, upgrade all affected Cdr dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade cdr to 0.2.4Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for cdrHow to Check if You Are Affected
To determine whether your application is affected by CVE-2021-26305, inspect your project dependencies for Cdr:
inspect dependencies for cdrAnalyze the terminal output to locate any version of Cdr in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.2.4), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-908: Use of Uninitialized Resource, where the product uses or accesses a resource that has not been initialized. In Cdr, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2021-26305 Affected Cdr Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
cdr
|
crates.io |
< 0.2.4
|
0.2.4
|
References
Frequently Asked Questions
What is CVE-2021-26305?
Which Cdr versions are affected?
What version fixes CVE-2021-26305?
Is cdr affected?
What is the CVSS score of CVE-2021-26305?
What CWE is associated with CVE-2021-26305?
How can I check crates.io dependencies for CVE-2021-26305?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-37jj-wp7g-7wj4",
"modified" : "2021-08-19T17:53:09Z",
"published" : "2021-08-25T20:53:12Z",
"aliases" : [ "CVE-2021-26305" ],
"summary" : "Read of uninitialized memory in cdr",
"details" : "An issue was discovered in Deserializer::read_vec in the cdr crate before 0.2.4 for Rust. A user-provided Read implementation can gain access to the old contents of newly allocated heap memory, violating soundness.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "crates.io",
"name" : "cdr"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "0.2.4"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-26305"
}, {
"type" : "WEB",
"url" : "https://github.com/hrektts/cdr-rs/issues/10"
}, {
"type" : "WEB",
"url" : "https://github.com/hrektts/cdr-rs/pull/11"
}, {
"type" : "WEB",
"url" : "https://github.com/hrektts/cdr-rs/commit/0e6006de464caa331643f86cd2d9ba3b32b09833"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/hrektts/cdr-rs"
}, {
"type" : "WEB",
"url" : "https://rustsec.org/advisories/RUSTSEC-2021-0012.html"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-908" ],
"severity" : "CRITICAL",
"github_reviewed" : true,
"github_reviewed_at" : "2021-08-19T17:53:09Z",
"nvd_published_at" : null
}
}