CVE-2021-36154: Github.com/grpc/grpc swift Uncontrolled Recursion Vulnerability
MODERATECVE-2021-36154 is a MODERATE uncontrolled recursion vulnerability (CWE-674: Uncontrolled Recursion) affecting Github.com/grpc/grpc swift libraries in the SwiftURL ecosystem. The issue involves uncontrolled recursion in http2torawgrpcservercodec. Remediation is available by upgrading affected packages to version 1.2.0.
CVE-2021-36154 at a Glance
How to Fix CVE-2021-36154
To remediate this vulnerability, upgrade all affected Github.com/grpc/grpc swift 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 github.com/grpc/grpc-swift to 1.2.0Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/grpc/grpc-swiftHow to Check if You Are Affected
To determine whether your application is affected by CVE-2021-36154, inspect your project dependencies for Github.com/grpc/grpc swift:
inspect dependencies for github.com/grpc/grpc-swiftAnalyze the terminal output to locate any version of Github.com/grpc/grpc swift in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.2.0), 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-674: Uncontrolled Recursion, where the product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack. In Github.com/grpc/grpc swift, 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-2021-36154 Affected Github.com/grpc/grpc swift Versions
1 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/grpc/grpc-swift
|
SwiftURL |
< 1.2.0
|
1.2.0
|
References
Frequently Asked Questions
What is CVE-2021-36154?
Which Github.com/grpc/grpc swift versions are affected?
What version fixes CVE-2021-36154?
Is github.com/grpc/grpc-swift affected?
What CWE is associated with CVE-2021-36154?
How can I check SwiftURL dependencies for CVE-2021-36154?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-4rhq-vq24-88gw",
"modified" : "2023-05-22T20:29:44Z",
"published" : "2023-05-22T20:29:44Z",
"aliases" : [ "CVE-2021-36154" ],
"summary" : "Uncontrolled Recursion in HTTP2ToRawGRPCServerCodec",
"details" : "### Impact\n\nAffected gRPC Swift servers are vulnerable to uncontrolled recursion and stack consumption when parsing certain payloads. This may lead to a denial of service.\n\n### Patches\n\nThe problem has been fixed in 1.2.0.\n\n### Workarounds\n\nNo workaround is available. Users must upgrade.",
"severity" : [ ],
"affected" : [ {
"package" : {
"ecosystem" : "SwiftURL",
"name" : "github.com/grpc/grpc-swift"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "1.2.0"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"url" : "https://github.com/grpc/grpc-swift/security/advisories/GHSA-4rhq-vq24-88gw"
}, {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-36154"
}, {
"type" : "WEB",
"url" : "https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35274"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/grpc/grpc-swift"
}, {
"type" : "WEB",
"url" : "https://github.com/grpc/grpc-swift/releases/tag/1.2.0"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-674" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2023-05-22T20:29:44Z",
"nvd_published_at" : "2021-07-09T12:15:00Z"
}
}