Vulnerability identifier: #VU93386
Vulnerability risk: Low
CVSSv3.1: 4.8 [AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-667
Exploitation vector: Local
Exploit availability: No
Vulnerable software:
Linux kernel
Operating systems & Components /
Operating system
Vendor: Linux Foundation
Description
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper locking within the nf_reject6_fill_skb_dst() and nf_send_reset6() functions in net/ipv6/netfilter/nf_reject_ipv6.c, within the nf_reject_fill_skb_dst() and nf_send_reset() functions in net/ipv4/netfilter/nf_reject_ipv4.c, within the br_nf_pre_routing_finish_ipv6() function in net/bridge/br_netfilter_ipv6.c, within the br_nf_pre_routing_finish_bridge(), br_nf_ipv4_daddr_was_changed(), bridge_parent_rtable(), skb_dst_set_noref(), setup_pre_routing(), br_nf_forward_finish(), ip_sabotage_in() and br_nf_pre_routing_finish_bridge_slow() functions in net/bridge/br_netfilter_hooks.c. A local user can perform a denial of service (DoS) attack.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Linux kernel:
External links
http://git.kernel.org/stable/c/7ae19ee81ca56b13c50a78de6c47d5b8fdc9d97b
http://git.kernel.org/stable/c/9325e3188a9cf3f69fc6f32af59844bbc5b90547
http://git.kernel.org/stable/c/544add1f1cfb78c3dfa3e6edcf4668f6be5e730c
http://git.kernel.org/stable/c/9874808878d9eed407e3977fd11fee49de1e1d86
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.