Resource Injection Affecting bpftool package, versions <0:4.18.0-553.22.1.el8_10
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Test your applications- Snyk ID SNYK-CENTOS8-BPFTOOL-7514470
- published 17 Jul 2024
- disclosed 15 Jul 2024
Introduced: 15 Jul 2024
CVE-2024-41007 Open this link in a new tabHow to fix?
Upgrade Centos:8 bpftool to version 0:4.18.0-553.22.1.el8_10 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by Centos.
See How to fix? for Centos:8 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
tcp: avoid too many retransmit packets
If a TCP socket is using TCP_USER_TIMEOUT, and the other peer retracted its window to zero, tcp_retransmit_timer() can retransmit a packet every two jiffies (2 ms for HZ=1000), for about 4 minutes after TCP_USER_TIMEOUT has 'expired'.
The fix is to make sure tcp_rtx_probe0_timed_out() takes icsk->icsk_user_timeout into account.
Before blamed commit, the socket would not timeout after icsk->icsk_user_timeout, but would use standard exponential backoff for the retransmits.
Also worth noting that before commit e89688e3e978 ("net: tcp: fix unexcepted socket die when snd_wnd is 0"), the issue would last 2 minutes instead of 4.
References
- https://access.redhat.com/security/cve/CVE-2024-41007
- https://git.kernel.org/stable/c/04317a2471c2f637b4c49cbd0e9c0d04a519f570
- https://git.kernel.org/stable/c/5d7e64d70a11d988553a08239c810a658e841982
- https://git.kernel.org/stable/c/66cb64a1d2239cd0309f9b5038b05462570a5be1
- https://git.kernel.org/stable/c/7bb7670f92bfbd05fc41a8f9a8f358b7ffed65f4
- https://git.kernel.org/stable/c/97a9063518f198ec0adb2ecb89789de342bb8283
- https://git.kernel.org/stable/c/d2346fca5bed130dc712f276ac63450201d52969
- https://git.kernel.org/stable/c/dfcdd7f89e401d2c6616be90c76c2fac3fa98fde
- https://git.kernel.org/stable/c/e113cddefa27bbf5a79f72387b8fbd432a61a466