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CVE-2024-45016

Vulnérabilité élevée dans Linux (Linux)

CVSS 7.8 · Élevée
EPSS 0.3%
Linux•Linux•Versions : <=6.1.*, 4.19.28, 0, 4.9.163, <4.21, <4.10, 0148fe458b5705e2fea7cb88294fed7e36066ca2, a550a01b8af856f2684b0f79d552f5119eb5006c, 6.6.48, 4.20.15, 009510a90e230bb495f3fe25c7db956679263b07, <4.20, <577d6c0619467fe90f7e8e57e45cb5bd9d936014, <=5.10.*, <=6.6.*, <759e3e8c4a6a6b4e52ebc4547123a457f0ce90d4, 5.0, 5.10.225, 4de7d30668cb8b06330992e1cd336f91700a2ce7, <=6.10.*, d1dd2e15c85e890a1cc9bde5ba07ae63331e5c73, <=5.4.*, <0486d31dd8198e22b63a4730244b38fffce6d469, <5.0, 6.1.107, <e5bb2988a310667abed66c7d3ffa28880cf0f883, 4.14.106, 3.16.66, <c414000da1c2ea1ba9a5e5bb1a4ba774e51e202d, <52d99a69f3d556c6426048c9d481b912205919d8, 6.11, <=*, <c07ff8592d57ed258afee5a5e04991a48dbaf382, <=5.15.*, <3.17, 6.10.7, <4.15, 5.4.283, 5.15.166, 5845f706388a4cde0f6b80f9e5d33527e942b7d9

Description

In the Linux kernel, the following vulnerability has been resolved: netem: fix return value if duplicate enqueue fails There is a bug in netem_enqueue() introduced by commit 5845f706388a ("net: netem: fix skb length BUG_ON in __skb_to_sgvec") that can lead to a use-after-free. This commit made netem_enqueue() always return NET_XMIT_SUCCESS when a packet is duplicated, which can cause the parent qdisc's q.qlen to be mistakenly incremented. When this happens qlen_notify() may be skipped on the parent during destruction, leaving a dangling pointer for some classful qdiscs like DRR. There are two ways for the bug happen: - If the duplicated packet is dropped by rootq->enqueue() and then the original packet is also dropped. - If rootq->enqueue() sends the duplicated packet to a different qdisc and the original packet is dropped. In both cases NET_XMIT_SUCCESS is returned even though no packets are enqueued at the netem qdisc. The fix is to defer the enqueue of the duplicate packet until after the original packet has been guaranteed to return NET_XMIT_SUCCESS.

Gravité et risque d'exploitation

CVE-2024-45016 obtient un score CVSS de 7.8/10, soit une gravité élevée. Selon le modèle EPSS, la probabilité qu'elle soit exploitée dans les 30 prochains jours est de 0.28 %, ce qui la place devant 19.5 % des CVE référencées.

Que faire ?

  • Vérifiez si Linux (versions <=6.1.*, 4.19.28, 0, 4.9.163, <4.21, <4.10, 0148fe458b5705e2fea7cb88294fed7e36066ca2, a550a01b8af856f2684b0f79d552f5119eb5006c, 6.6.48, 4.20.15, 009510a90e230bb495f3fe25c7db956679263b07, <4.20, <577d6c0619467fe90f7e8e57e45cb5bd9d936014, <=5.10.*, <=6.6.*, <759e3e8c4a6a6b4e52ebc4547123a457f0ce90d4, 5.0, 5.10.225, 4de7d30668cb8b06330992e1cd336f91700a2ce7, <=6.10.*, d1dd2e15c85e890a1cc9bde5ba07ae63331e5c73, <=5.4.*, <0486d31dd8198e22b63a4730244b38fffce6d469, <5.0, 6.1.107, <e5bb2988a310667abed66c7d3ffa28880cf0f883, 4.14.106, 3.16.66, <c414000da1c2ea1ba9a5e5bb1a4ba774e51e202d, <52d99a69f3d556c6426048c9d481b912205919d8, 6.11, <=*, <c07ff8592d57ed258afee5a5e04991a48dbaf382, <=5.15.*, <3.17, 6.10.7, <4.15, 5.4.283, 5.15.166, 5845f706388a4cde0f6b80f9e5d33527e942b7d9) est présent sur votre parc.
  • Appliquez le correctif ou la version corrigée indiqués dans les références de l'éditeur.
  • À défaut de correctif, limitez l'exposition (filtrage réseau, désactivation du composant).
  • Automatisez la détection : les agents CVE Heimdall (gratuits, open source) corrèlent l'inventaire de vos serveurs avec la base CVE.

Références

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