CVE-2023-26248 Content Censorship in the InterPlanetary File System (IPFS) via Kademlia DHT abuse
Attackers can censor IPFS content by hijacking resolution via Sybil peers in the Kademlia DHT, affecting IPFS users and developers.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-26248?
CVE-2023-26248 is a medium-severity vulnerability in n/a, published on 25 Oct 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The Kademlia DHT (go-libp2p-kad-dht 0.20.0 and earlier) used in IPFS (0.18.1 and earlier) assigns routing information for content (i.e., information about who holds the content) to be stored by peers whose peer IDs have a small DHT distance from the content ID. This allows an attacker to censor content by generating many Sybil peers whose peer IDs have a small distance from the content ID, thus hijacking the content resolution process.
Weakness: CWE-352
Which versions are affected by CVE-2023-26248?
3 open source packages ship an affected version, including github.com/libp2p/go-libp2p-kad-dht.
| Package | Affected | Fixed in |
|---|---|---|
github.com/libp2p/go-libp2p-kad-dht Go | All versions | None |
github.com/libp2p/go-libp2p-kad-dht Go | All versions to 0.20.0 | None |
github.com/libp2p/go-libp2p-kad-dht Go | All versions to 0.20.0 | None |
How do I fix CVE-2023-26248?
Upgrade to a fixed version.
Is CVE-2023-26248 being exploited?
There is no known exploitation of CVE-2023-26248 in the wild and no public exploit code.
Sources
Also known as GHSA-mqr9-hjr8-2m9w, GO-2024-3218.