Eric Dumazet

23 exploits Active since Feb 2013
CVE-2012-6638 WRITEUP WRITEUP
Linux Kernel < 3.0.38 - Denial of Service
The tcp_rcv_state_process function in net/ipv4/tcp_input.c in the Linux kernel before 3.2.24 allows remote attackers to cause a denial of service (kernel resource consumption) via a flood of SYN+FIN TCP packets, a different vulnerability than CVE-2012-2663.
CVE-2012-6657 WRITEUP WRITEUP
Linux Kernel < 3.5.6 - Access Control
The sock_setsockopt function in net/core/sock.c in the Linux kernel before 3.5.7 does not ensure that a keepalive action is associated with a stream socket, which allows local users to cause a denial of service (system crash) by leveraging the ability to create a raw socket.
CVE-2012-6704 WRITEUP HIGH WRITEUP
Linux Kernel < 3.2.85 - Memory Corruption
The sock_setsockopt function in net/core/sock.c in the Linux kernel before 3.5 mishandles negative values of sk_sndbuf and sk_rcvbuf, which allows local users to cause a denial of service (memory corruption and system crash) or possibly have unspecified other impact by leveraging the CAP_NET_ADMIN capability for a crafted setsockopt system call with the (1) SO_SNDBUF or (2) SO_RCVBUF option.
CVSS 7.8
CVE-2013-0290 WRITEUP WRITEUP
Linux Kernel < 3.7.9 - Improper Input Validation
The __skb_recv_datagram function in net/core/datagram.c in the Linux kernel before 3.8 does not properly handle the MSG_PEEK flag with zero-length data, which allows local users to cause a denial of service (infinite loop and system hang) via a crafted application.
CVE-2013-2017 WRITEUP WRITEUP
Linux Kernel < 2.6.33.20 - Resource Management Error
The veth (aka virtual Ethernet) driver in the Linux kernel before 2.6.34 does not properly manage skbs during congestion, which allows remote attackers to cause a denial of service (system crash) by leveraging lack of skb consumption in conjunction with a double-free error.
CVE-2013-2232 WRITEUP WRITEUP
Linux Kernel < 3.9.9 - Improper Input Validation
The ip6_sk_dst_check function in net/ipv6/ip6_output.c in the Linux kernel before 3.10 allows local users to cause a denial of service (system crash) by using an AF_INET6 socket for a connection to an IPv4 interface.
CVE-2015-5364 WRITEUP WRITEUP
Linux kernel <4.0.6 - DoS
The (1) udp_recvmsg and (2) udpv6_recvmsg functions in the Linux kernel before 4.0.6 do not properly consider yielding a processor, which allows remote attackers to cause a denial of service (system hang) via incorrect checksums within a UDP packet flood.
CVE-2015-5366 WRITEUP WRITEUP
Linux kernel < 4.0.6 - DoS
The (1) udp_recvmsg and (2) udpv6_recvmsg functions in the Linux kernel before 4.0.6 provide inappropriate -EAGAIN return values, which allows remote attackers to cause a denial of service (EPOLLET epoll application read outage) via an incorrect checksum in a UDP packet, a different vulnerability than CVE-2015-5364.
CVE-2016-8645 WRITEUP MEDIUM WRITEUP
Linux kernel <4.8.10 - DoS
The TCP stack in the Linux kernel before 4.8.10 mishandles skb truncation, which allows local users to cause a denial of service (system crash) via a crafted application that makes sendto system calls, related to net/ipv4/tcp_ipv4.c and net/ipv6/tcp_ipv6.c.
CVSS 5.5
CVE-2017-14106 WRITEUP MEDIUM WRITEUP
Linux kernel <4.12 - DoS
The tcp_disconnect function in net/ipv4/tcp.c in the Linux kernel before 4.12 allows local users to cause a denial of service (__tcp_select_window divide-by-zero error and system crash) by triggering a disconnect within a certain tcp_recvmsg code path.
CVSS 5.5
CVE-2017-5970 WRITEUP HIGH WRITEUP
Linux Kernel < 4.9.9 - NULL Pointer Dereference
The ipv4_pktinfo_prepare function in net/ipv4/ip_sockglue.c in the Linux kernel through 4.9.9 allows attackers to cause a denial of service (system crash) via (1) an application that makes crafted system calls or possibly (2) IPv4 traffic with invalid IP options.
CVSS 7.5
CVE-2017-6214 WRITEUP HIGH WRITEUP
Linux Kernel < 4.9.10 - Infinite Loop
The tcp_splice_read function in net/ipv4/tcp.c in the Linux kernel before 4.9.11 allows remote attackers to cause a denial of service (infinite loop and soft lockup) via vectors involving a TCP packet with the URG flag.
CVSS 7.5
CVE-2017-6345 WRITEUP HIGH WRITEUP
Linux Kernel < 4.9.12 - Improper Input Validation
The LLC subsystem in the Linux kernel before 4.9.13 does not ensure that a certain destructor exists in required circumstances, which allows local users to cause a denial of service (BUG_ON) or possibly have unspecified other impact via crafted system calls.
CVSS 7.8
CVE-2017-6346 WRITEUP HIGH WRITEUP
Linux Kernel < 3.2.87 - Race Condition
Race condition in net/packet/af_packet.c in the Linux kernel before 4.9.13 allows local users to cause a denial of service (use-after-free) or possibly have unspecified other impact via a multithreaded application that makes PACKET_FANOUT setsockopt system calls.
CVSS 7.0
CVE-2017-7277 WRITEUP HIGH WRITEUP
Linux kernel <4.10.6 - Info Disclosure/DoS
The TCP stack in the Linux kernel through 4.10.6 mishandles the SCM_TIMESTAMPING_OPT_STATS feature, which allows local users to obtain sensitive information from the kernel's internal socket data structures or cause a denial of service (out-of-bounds read) via crafted system calls, related to net/core/skbuff.c and net/socket.c.
CVSS 7.1
CVE-2017-9075 WRITEUP HIGH WRITEUP
Linux kernel <4.11.1 - DoS
The sctp_v6_create_accept_sk function in net/sctp/ipv6.c in the Linux kernel through 4.11.1 mishandles inheritance, which allows local users to cause a denial of service or possibly have unspecified other impact via crafted system calls, a related issue to CVE-2017-8890.
CVSS 7.8
CVE-2017-9242 WRITEUP MEDIUM WRITEUP
Linux kernel <4.11.3 - DoS
The __ip6_append_data function in net/ipv6/ip6_output.c in the Linux kernel through 4.11.3 is too late in checking whether an overwrite of an skb data structure may occur, which allows local users to cause a denial of service (system crash) via crafted system calls.
CVSS 5.5
CVE-2019-10638 WRITEUP MEDIUM WRITEUP
Linux Kernel < 5.1.7 - Weak Encryption
In the Linux kernel before 5.1.7, a device can be tracked by an attacker using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). An attack may be conducted by hosting a crafted web page that uses WebRTC or gQUIC to force UDP traffic to attacker-controlled IP addresses.
CVSS 6.5
CVE-2019-10639 WRITEUP HIGH WRITEUP
Linux Kernel < 4.20.9 - Weak Encryption
The Linux kernel 4.x (starting from 4.1) and 5.x before 5.0.8 allows Information Exposure (partial kernel address disclosure), leading to a KASLR bypass. Specifically, it is possible to extract the KASLR kernel image offset using the IP ID values the kernel produces for connection-less protocols (e.g., UDP and ICMP). When such traffic is sent to multiple destination IP addresses, it is possible to obtain hash collisions (of indices to the counter array) and thereby obtain the hashing key (via enumeration). This key contains enough bits from a kernel address (of a static variable) so when the key is extracted (via enumeration), the offset of the kernel image is exposed. This attack can be carried out remotely, by the attacker forcing the target device to send UDP or ICMP (or certain other) traffic to attacker-controlled IP addresses. Forcing a server to send UDP traffic is trivial if the server is a DNS server. ICMP traffic is trivial if the server answers ICMP Echo requests (ping). For client targets, if the target visits the attacker's web page, then WebRTC or gQUIC can be used to force UDP traffic to attacker-controlled IP addresses. NOTE: this attack against KASLR became viable in 4.1 because IP ID generation was changed to have a dependency on an address associated with a network namespace.
CVSS 7.5
CVE-2019-11479 WRITEUP HIGH WRITEUP
Linux kernel - DoS
Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fragment TCP resend queues significantly more than if a larger MSS were enforced. A remote attacker could use this to cause a denial of service. This has been fixed in stable kernel releases 4.4.182, 4.9.182, 4.14.127, 4.19.52, 5.1.11, and is fixed in commits 967c05aee439e6e5d7d805e195b3a20ef5c433d6 and 5f3e2bf008c2221478101ee72f5cb4654b9fc363.
CVSS 7.5
CVE-2019-20422 WRITEUP MEDIUM WRITEUP
Linux Kernel < 5.3.4 - Improper Exception Handling
In the Linux kernel before 5.3.4, fib6_rule_lookup in net/ipv6/ip6_fib.c mishandles the RT6_LOOKUP_F_DST_NOREF flag in a reference-count decision, leading to (for example) a crash that was identified by syzkaller, aka CID-7b09c2d052db.
CVSS 5.5
CVE-2019-5599 WRITEUP HIGH WRITEUP
Freebsd - Resource Allocation Without Limits
In FreeBSD 12.0-STABLE before r349197 and 12.0-RELEASE before 12.0-RELEASE-p6, a bug in the non-default RACK TCP stack can allow an attacker to cause several linked lists to grow unbounded and cause an expensive list traversal on every packet being processed, leading to resource exhaustion and a denial of service.
CVSS 7.5
CVE-2022-28356 WRITEUP MEDIUM WRITEUP
Linux kernel <5.17.1 - Info Disclosure
In the Linux kernel before 5.17.1, a refcount leak bug was found in net/llc/af_llc.c.
CVSS 5.5