GHSA-5fm9-h728-fwpj

Suggest an improvement
Source
https://github.com/advisories/GHSA-5fm9-h728-fwpj
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/06/GHSA-5fm9-h728-fwpj/GHSA-5fm9-h728-fwpj.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-5fm9-h728-fwpj
Aliases
Published
2023-06-06T02:06:23Z
Modified
2023-11-08T04:15:42.121988Z
Summary
trust-dns vulnerable to Remote Attackers causing Denial-of-Service (packet loops) with crafted DNS packets
Details

trust-dns and trust-dns-server are vulnerable to remotely triggered denial-of-service attacks, consuming both network and CPU resources. DNS messages with the QR=1 bit set are responded to with a FormErr response. This allows creating a traffic loop, in which these FormErr responses are sent nonstop between vulnerable servers.

There are two scenarios how this can be exploited: 1) Create a loop between two instances of trust-dns, consuming network resources, or 2) consuming the CPU of a single instance.

With two instances A and B an attacker sends a DNS query with a spoofed source IP address to A. A replies with a FormErr to B. Now both servers with ping-pong the message back and forth until by chance the packet is dropped in the network. Multiple spoofed packets can be sent by the attacker, increasing resource consumption.

A single server can get locked up replying to itself. Same setup as above, but now A sends the reply to itself. The packet is sent out as fast as the CPU and network stack manage. This locks up a CPU core. Multiple packets from the attacker consume multiple CPU cores.

Database specific
{
    "nvd_published_at": null,
    "cwe_ids": [],
    "severity": "MODERATE",
    "github_reviewed": true,
    "github_reviewed_at": "2023-06-06T02:06:23Z"
}
References

Affected packages

crates.io / trust-dns-server

Package

Name
trust-dns-server
View open source insights on deps.dev
Purl
pkg:cargo/trust-dns-server

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
0.22.1

crates.io / trust-dns-server

Package

Name
trust-dns-server
View open source insights on deps.dev
Purl
pkg:cargo/trust-dns-server

Affected ranges

Type
SEMVER
Events
Introduced
0.23.0-alpha.2
Fixed
0.23.0-alpha.3