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CVE-2019-11479

kernel: tcp: excessive resource consumption for TCP connections with low MSS allows remote denial of service

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 3.1 · 7.5 High EPSS 91.3% KEV · Not listed
Vendors
Canonical F5 Linux and 1 more
Products
Ubuntu Linux Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 24 more
CVE-2019-11478

SACK can cause extensive memory use via fragmented resend queue

Jonathan Looney discovered that the TCP retransmission queue implementation in tcp_fragment in the Linux kernel could be fragmented when handling certain TCP Selective Acknowledgment (SACK) sequences. 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 commit f070ef2ac66716357066b683fb0baf55f8191a2e.

CVSS 3.0 · 5.3 Medium EPSS 94.4% KEV · Not listed
Vendors
Canonical F5 Ivanti and 3 more
Products
Ubuntu Linux Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 26 more
CVE-2019-11477

Integer overflow in TCP_SKB_CB(skb)->tcp_gso_segs

Jonathan Looney discovered that the TCP_SKB_CB(skb)->tcp_gso_segs value was subject to an integer overflow in the Linux kernel when handling TCP Selective Acknowledgments (SACKs). 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 commit 3b4929f65b0d8249f19a50245cd88ed1a2f78cff.

CVSS 3.1 · 7.5 High EPSS 98.7% KEV · Not listed
Vendors
Canonical F5 Ivanti and 3 more
Products
Ubuntu Linux Big-ip Access Policy Manager Big-ip Advanced Firewall Manager and 26 more
CVE-2018-20836

kernel: race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c leads to use-after-free

An issue was discovered in the Linux kernel before 4.20. There is a race condition in smp_task_timedout() and smp_task_done() in drivers/scsi/libsas/sas_expander.c, leading to a use-after-free.

CVSS 3.1 · 8.1 High EPSS 5.1% KEV · Not listed
Vendors
Canonical Debian F5 and 4 more
Products
Ubuntu Linux Debian Linux Traffix Signaling Delivery Controller and 13 more
CVE-2018-20657

libiberty: Memory leak in demangle_template function resulting in a denial of service

The demangle_template function in cplus-dem.c in GNU libiberty, as distributed in GNU Binutils 2.31.1, has a memory leak via a crafted string, leading to a denial of service (memory consumption), as demonstrated by cxxfilt, a related issue to CVE-2018-12698.

CVSS 3.0 · 7.5 High EPSS 4.0% KEV · Not listed
Vendors
F5 Gnu Redhat
Products
Traffix Signaling Delivery Controller Binutils Enterprise Linux
CVE-2018-20002

binutils: memory leak in _bfd_generic_read_minisymbols function in syms.c

The _bfd_generic_read_minisymbols function in syms.c in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.31, has a memory leak via a crafted ELF file, leading to a denial of service (memory consumption), as demonstrated by nm.

CVSS 3.0 · 5.5 Medium EPSS 1.8% KEV · Not listed
Vendors
F5 Gnu Netapp
Products
Traffix Signaling Delivery Controller Binutils Cluster Data Ontap and 1 more
CVE-2018-1320

thrift: SASL negotiation isComplete validation bypass in the org.apache.thrift.transport.TSaslTransport class

Apache Thrift Java client library versions 0.5.0 through 0.11.0 can bypass SASL negotiation isComplete validation in the org.apache.thrift.transport.TSaslTransport class. An assert used to determine if the SASL handshake had successfully completed could be disabled in production settings making the validation incomplete.

CVSS 3.1 · 7.5 High EPSS 8.2% KEV · Not listed
Vendors
Apache Debian F5 and 2 more
Products
Thrift Debian Linux Traffix Signaling Delivery Controller and 3 more