| Summary: |
VUL-0: CVE-2024-41007: kernel: tcp: avoid too many retransmit packets |
| Product: |
[Novell Products] SUSE Security Incidents
|
Reporter: |
SMASH SMASH <smash_bz> |
| Component: |
Incidents | Assignee: |
Denis Kirjanov <denis.kirjanov> |
| Status: |
NEW
---
|
QA Contact: |
Security Team bot <security-team> |
| Severity: |
Minor
|
|
|
| Priority: |
P3 - Medium
|
CC: |
camila.matos, davide.benini, denis.kirjanov, miroslav.franc, mkubecek
|
| Version: |
unspecified | |
|
| Target Milestone: |
--- | |
|
| Hardware: |
Other | |
|
| OS: |
Other | |
|
| URL: |
https://smash.suse.de/issue/414107/
|
| Whiteboard: |
CVSSv3.1:SUSE:CVE-2024-41007:2.5:(AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L) |
|
Found By:
|
Security Response Team
|
Services Priority:
|
|
|---|
|
Business Priority:
|
|
Blocker:
|
---
|
|---|
|
Marketing QA Status:
|
---
|
IT Deployment:
|
---
|
|---|
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: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-41007 https://www.cve.org/CVERecord?id=CVE-2024-41007 https://git.kernel.org/stable/c/97a9063518f198ec0adb2ecb89789de342bb8283 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-41007.mbox