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ubuntucveUbuntu.comUB:CVE-2024-7246
HistoryAug 06, 2024 - 12:00 a.m.

CVE-2024-7246

2024-08-0600:00:00
ubuntu.com
ubuntu.com
5
grpc
hpack table
failed requests
http header leak
vulnerability
update
fixed version

CVSS4

6.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/SC:N/VI:N/SI:N/VA:L/SA:L

AI Score

6.5

Confidence

Low

EPSS

0

Percentile

9.5%

It’s possible for a gRPC client communicating with a HTTP/2 proxy to poison
the HPACK table between the proxy and the backend such that other clients
see failed requests. It’s also possible to use this vulnerability to leak
other clients HTTP header keys, but not values.
This occurs because the error status for a misencoded header is not cleared
between header reads, resulting in subsequent (incrementally indexed) added
headers in the first request being poisoned until cleared from the HPACK
table.
Please update to a fixed version of gRPC as soon as possible. This bug has
been fixed in 1.58.3, 1.59.5, 1.60.2, 1.61.3, 1.62.3, 1.63.2, 1.64.3,
1.65.4.

CVSS4

6.3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/SC:N/VI:N/SI:N/VA:L/SA:L

AI Score

6.5

Confidence

Low

EPSS

0

Percentile

9.5%