Description

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Users of IPsec transparent encryption in Cilium may be vulnerable to cryptographic attacks that render the transparent encryption ineffective. In particular, Cilium is vulnerable to chosen plaintext, key recovery, replay attacks by a man-in-the-middle attacker. These attacks are possible due to an ESP sequence number collision when multiple nodes are configured with the same key. Fixed versions of Cilium use unique keys for each IPsec tunnel established between nodes, resolving all of the above attacks. This vulnerability is fixed in 1.13.13, 1.14.9, and 1.15.3.

Classification

CVE ID: CVE-2024-28860

CVSS Base Severity: HIGH

CVSS Base Score: 8.0

CVSS Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

Affected Products

Vendor: cilium

Product: cilium

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.02% (probability of being exploited)

EPSS Percentile: 3.37% (scored less or equal to compared to others)

EPSS Date: 2025-04-20 (when was this score calculated)

Stakeholder-Specific Vulnerability Categorization (SSVC)

SSVC Exploitation: none

SSVC Technical Impact: total

SSVC Automatable: false

References

https://nvd.nist.gov/vuln/detail/CVE-2024-28860
https://github.com/cilium/cilium/security/advisories/GHSA-pwqm-x5x6-5586
https://github.com/cilium/cilium/commit/311fbce5280491cddceab178d83b06fa23688c72
https://github.com/cilium/cilium/commit/a1742b478306fa256cd27df1039dfae0537b4149
https://github.com/cilium/cilium/commit/a652c123331852cca90c74202f993d4170fd37fa
https://docs.cilium.io/en/stable/security/network/encryption-ipsec

Timeline