In the Linux kernel, the following vulnerability has been resolved: tunnels: do not assume transport header in iptunnel_pmtud_check_icmp() In some cases, iptunnel_pmtud_check_icmp() can be called while skb transport header is not set. This triggers an out-of-bound access, because (typeof(skb->transport_header))~0U is 65535. Access the icmp header based on IPv4 network header, after making sure icmp->type is present in skb linear part. Note that iptunnel_pmtud_check_icmpv6()) is fine.
In the Linux kernel, the following vulnerability has been resolved:
tunnels: do not assume transport header in iptunnel_pmtud_check_icmp()
In some cases, iptunnel_pmtud_check_icmp() can be called while skb transport header is not set.
This triggers an out-of-bound access, because (typeof(skb->transport_header))~0U is 65535.
Access the icmp header based on IPv4 network header, after making sure icmp->type is present in skb linear part.
Note that iptunnel_pmtud_check_icmpv6()) is fine.
为什么是这个 VPI(可解释·实验性)
VPI 计算依据
| 影响度 | 91.00 |
| 利用信号(无额外利用信号) | ×1.00 |
| VPI | 91.00 |
VPI 公式 vpi-v1