Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: do not send ICMP/NDISC Redirects when peer allocation fails When inet_getpeer_v4() or inet_getpeer_v6() fails to allocate a peer entry under memory pressure or tree size caps, redirect handlers previously fell back to sending un-rate-limited ICMP/NDISC Redirect messages. In IPv4, ip_rt_send_redirect() called icmp_send() directly when peer == NULL. In IPv6, ip6_forward() and ndisc_send_redirect() passed a NULL peer into inet_peer_xrlim_allow(), which returned true when peer == NULL. Because ICMP/NDISC Redirects are not part of the default global rate limit mask (sysctl_icmp_ratemask), sending redirects when peer == NULL creates an un-rate-limited ICMP packet storm. Fix this by failing closed in ip_rt_send_redirect(), ip6_forward(), and ndisc_send_redirect() when peer is NULL.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 92d8682926342d2b6aa5b2ecc02221e00e1573a0 before c0adf8b4247bcc5a145a25c1929006eb392580bb; affected 92d8682926342d2b6aa5b2ecc02221e00e1573a0 before f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1; affected 92d8682926342d2b6aa5b2ecc02221e00e1573a0 before 21666f7af49a90ef44d474916b8ef4402dfd74f5; affected 92d8682926342d2b6aa5b2ecc02221e00e1573a0 before 5ec5f00fc606a6df8434948c4552b3cb1176595d; affected 92d8682926342d2b6aa5b2ecc02221e00e1573a0 before 828f6670d110ff2bf44c743037b38badc315704c; affected 92d8682926342d2b6aa5b2ecc02221e00e1573a0 before dbc3791e3b2472e1ccc08947e0f83b443470ff4f |
| Linux / Linux | affected 2.6.39; unaffected 0 before 2.6.39; unaffected 6.1.183 through 6.1.*; unaffected 6.6.151 through 6.6.*; unaffected 6.12.103 through 6.12.*; unaffected 6.18.44 through 6.18.*; unaffected 7.1.8 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c0adf8b4247bcc5a145a25c1929006eb392580bb
- https://git.kernel.org/stable/c/f5ecaa7ea7686fa7ecdb6affc9d3a9a42e4524b1
- https://git.kernel.org/stable/c/21666f7af49a90ef44d474916b8ef4402dfd74f5
- https://git.kernel.org/stable/c/5ec5f00fc606a6df8434948c4552b3cb1176595d
- https://git.kernel.org/stable/c/828f6670d110ff2bf44c743037b38badc315704c
- https://git.kernel.org/stable/c/dbc3791e3b2472e1ccc08947e0f83b443470ff4f
ADP enrichment
No English description supplied.
No references supplied.