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: ppp: Add bound checking for skb data on ppp_sync_txmungEnsure we have enough data in linear buffer from skb before accessinginitial bytes. This prevents potential out-of-bounds accesseswhen processing short packets.When ppp_sync_txmung receives an incoming package with an emptypayload:(remote) gef➤ p *(struct pppoe_hdr *) (skb->head + skb->network_header)$18 = { type = 0x1, ver = 0x1, code = 0x0, sid = 0x2, length = 0x0, tag = 0xffff8880371cdb96}from the skb struct (trimmed) tail = 0x16, end = 0x140, head = 0xffff88803346f400 "4", data = 0xffff88803346f416 ":\377", truesize = 0x380, len = 0x0, data_len = 0x0, mac_len = 0xe, hdr_len = 0x0,it is not safe to access data[2].[pabeni@redhat.com: fixed subj typo]
No PoCs from references.
- https://github.com/w4zu/Debian_security