CVE-2024-49948

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2024-49948
In the Linux kernel, the following vulnerability has been resolved: net: add more sanity checks to qdisc_pkt_len_init() One path takes care of SKB_GSO_DODGY, assuming skb->len is bigger than hdr_len. virtio_net_hdr_to_skb() does not fully dissect TCP headers, it only make sure it is at least 20 bytes. It is possible for an user to provide a malicious 'GSO' packet, total length of 80 bytes. - 20 bytes of IPv4 header - 60 bytes TCP header - a small gso_size like 8 virtio_net_hdr_to_skb() would declare this packet as a normal GSO packet, because it would see 40 bytes of payload, bigger than gso_size. We need to make detect this case to not underflow qdisc_skb_cb(skb)->pkt_len.

5.5 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
https://git.kernel.org/stable/c/1eebe602a8d8264a12e35e39d0645fa88dbbacdd Patch
https://git.kernel.org/stable/c/2415f465730e48b6e38da1c7c097317bf5dd2d20 Patch
https://git.kernel.org/stable/c/27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4 Patch
https://git.kernel.org/stable/c/473426a1d53a68dd1e718e6cd00d57936993fa6c Patch
https://git.kernel.org/stable/c/566a931a1436d0e0ad13708ea55479b95426213c Patch
https://git.kernel.org/stable/c/9b0ee571d20a238a22722126abdfde61f1b2bdd0 Patch
https://git.kernel.org/stable/c/ab9a9a9e9647392a19e7a885b08000e89c86b535 Patch
https://git.kernel.org/stable/c/d7d1a28f5dd57b4d83def876f8d7b4403bd37df9 Patch
https://git.kernel.org/stable/c/ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2 Patch
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*
History

12 Nov 2024, 21:19

Type Values Removed Values Added
CPE cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.12:rc1:*:*:*:*:*:*
CWE NVD-CWE-noinfo
CVSS v2 : unknown
v3 : unknown 		v2 : unknown
v3 : 5.5
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/1eebe602a8d8264a12e35e39d0645fa88dbbacdd - () https://git.kernel.org/stable/c/1eebe602a8d8264a12e35e39d0645fa88dbbacdd - Patch
References () https://git.kernel.org/stable/c/2415f465730e48b6e38da1c7c097317bf5dd2d20 - () https://git.kernel.org/stable/c/2415f465730e48b6e38da1c7c097317bf5dd2d20 - Patch
References () https://git.kernel.org/stable/c/27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4 - () https://git.kernel.org/stable/c/27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4 - Patch
References () https://git.kernel.org/stable/c/473426a1d53a68dd1e718e6cd00d57936993fa6c - () https://git.kernel.org/stable/c/473426a1d53a68dd1e718e6cd00d57936993fa6c - Patch
References () https://git.kernel.org/stable/c/566a931a1436d0e0ad13708ea55479b95426213c - () https://git.kernel.org/stable/c/566a931a1436d0e0ad13708ea55479b95426213c - Patch
References () https://git.kernel.org/stable/c/9b0ee571d20a238a22722126abdfde61f1b2bdd0 - () https://git.kernel.org/stable/c/9b0ee571d20a238a22722126abdfde61f1b2bdd0 - Patch
References () https://git.kernel.org/stable/c/ab9a9a9e9647392a19e7a885b08000e89c86b535 - () https://git.kernel.org/stable/c/ab9a9a9e9647392a19e7a885b08000e89c86b535 - Patch
References () https://git.kernel.org/stable/c/d7d1a28f5dd57b4d83def876f8d7b4403bd37df9 - () https://git.kernel.org/stable/c/d7d1a28f5dd57b4d83def876f8d7b4403bd37df9 - Patch
References () https://git.kernel.org/stable/c/ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2 - () https://git.kernel.org/stable/c/ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2 - Patch

08 Nov 2024, 16:15

Type Values Removed Values Added
References
  • () https://git.kernel.org/stable/c/473426a1d53a68dd1e718e6cd00d57936993fa6c -
  • () https://git.kernel.org/stable/c/d7d1a28f5dd57b4d83def876f8d7b4403bd37df9 -

23 Oct 2024, 15:13

Type Values Removed Values Added
Summary
  • (es) En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: añadir más comprobaciones de cordura a qdisc_pkt_len_init() Una ruta se encarga de SKB_GSO_DODGY, asumiendo que skb->len es más grande que hdr_len. virtio_net_hdr_to_skb() no disecciona completamente los encabezados TCP, solo se asegura de que tengan al menos 20 bytes. Es posible que un usuario proporcione un paquete 'GSO' malicioso, con una longitud total de 80 bytes. - 20 bytes de encabezado IPv4 - 60 bytes de encabezado TCP - un gso_size pequeño como 8 virtio_net_hdr_to_skb() declararía este paquete como un paquete GSO normal, porque vería 40 bytes de carga útil, más grande que gso_size. Necesitamos hacer que detecte este caso para no desbordar qdisc_skb_cb(skb)->pkt_len.

21 Oct 2024, 18:15

Type Values Removed Values Added
New CVE
Information

Published : 2024-10-21 18:15

Updated : 2024-11-12 21:19

NVD link : CVE-2024-49948

Mitre link : CVE-2024-49948

CVE.ORG link : CVE-2024-49948

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
NVD-CWE-noinfo