Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:net: fix crash when config small gso_max_size/gso_ipv4_max_sizeConfig a small gso_max_size/gso_ipv4_max_size will lead to an underflowin sk_dst_gso_max_size(), which may trigger a BUG_ON crash,because sk->sk_gso_max_size would be much bigger than device limits.Call Trace:tcp_write_xmit tso_segs = tcp_init_tso_segs(skb, mss_now); tcp_set_skb_tso_segs tcp_skb_pcount_set // skb->len = 524288, mss_now = 8 // u16 tso_segs = 524288/8 = 65535 -> 0 tso_segs = DIV_ROUND_UP(skb->len, mss_now) BUG_ON(!tso_segs)Add check for the minimum value of gso_max_size and gso_ipv4_max_size.
No PoCs from references.
- https://github.com/w4zu/Debian_security