Summary
kernel-uek
[3.8.13-118.35.2]
- tcp: enforce tcp_min_snd_mss in tcp_mtu_probing() (Eric Dumazet) [Orabug: 29886600] {CVE-2019-11477}
- tcp: add tcp_min_snd_mss sysctl (Eric Dumazet) [Orabug: 29884307] {CVE-2019-11479}
- tcp: tcp_fragment() should apply sane memory limits (Eric Dumazet) [Orabug: 29884307] {CVE-2019-11478}
- tcp: fix fack_count accounting on tcp_shift_skb_data() (Joao Martins) [Orabug: 29890831] {CVE-2019-11477}
- tcp: limit payload size of sacked skbs (Eric Dumazet) [Orabug: 29884307] {CVE-2019-11477}
Fixed packages 8
| Release | Package | Fixed in |
|---|---|---|
| Oracle Linux · 7 | dtrace-modules-3.8.13-118.35.2.el6uek | 0:0.4.5-3.el6 |
| Oracle Linux · 7 | dtrace-modules-3.8.13-118.35.2.el7uek | 0:0.4.5-3.el7 |
| Oracle Linux · 7 | kernel-uek | 0:3.8.13-118.35.2.el7uek |
| Oracle Linux · 7 | kernel-uek-debug | 0:3.8.13-118.35.2.el7uek |
| Oracle Linux · 7 | kernel-uek-debug-devel | 0:3.8.13-118.35.2.el7uek |
| Oracle Linux · 7 | kernel-uek-devel | 0:3.8.13-118.35.2.el7uek |
| Oracle Linux · 7 | kernel-uek-doc | 0:3.8.13-118.35.2.el7uek |
| Oracle Linux · 7 | kernel-uek-firmware | 0:3.8.13-118.35.2.el7uek |
Vulnerabilities 3
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High 7.5
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 fi…
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Medium 5.3
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 serv…
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Medium 5.3CVE-2019-11479 EPSS 91%
Jonathan Looney discovered that the Linux kernel default MSS is hard-coded to 48 bytes. This allows a remote peer to fr…