CVE - CVE-2024-49948

CVE-ID
CVE-2024-49948	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1eebe602a8d8264a12e35e39d0645fa88dbbacdd URL:https://git.kernel.org/stable/c/1eebe602a8d8264a12e35e39d0645fa88dbbacdd MISC:https://git.kernel.org/stable/c/2415f465730e48b6e38da1c7c097317bf5dd2d20 URL:https://git.kernel.org/stable/c/2415f465730e48b6e38da1c7c097317bf5dd2d20 MISC:https://git.kernel.org/stable/c/27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4 URL:https://git.kernel.org/stable/c/27a8fabc54d2f960d47bdfbebf2bdc6e8a92a4c4 MISC:https://git.kernel.org/stable/c/566a931a1436d0e0ad13708ea55479b95426213c URL:https://git.kernel.org/stable/c/566a931a1436d0e0ad13708ea55479b95426213c MISC:https://git.kernel.org/stable/c/9b0ee571d20a238a22722126abdfde61f1b2bdd0 URL:https://git.kernel.org/stable/c/9b0ee571d20a238a22722126abdfde61f1b2bdd0 MISC:https://git.kernel.org/stable/c/ab9a9a9e9647392a19e7a885b08000e89c86b535 URL:https://git.kernel.org/stable/c/ab9a9a9e9647392a19e7a885b08000e89c86b535 MISC:https://git.kernel.org/stable/c/ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2 URL:https://git.kernel.org/stable/c/ff1c3cadcf405ab37dd91418a62a7acecf3bc5e2
Assigning CNA
kernel.org
Date Record Created
20241021	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20241021)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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