Summary
Package updates are available for Amazon Linux 2 that fix the following vulnerabilities: CVE-2019-11479: CVE-2019-11478: CVE-2019-11477:
Fixed packages 13
| Release | Package | Fixed in |
|---|---|---|
| Amazon Linux · 2 | kernel | 0:4.14.123-111.109.amzn2 |
| Amazon Linux · 2 | kernel-debuginfo | 0:4.14.123-111.109.amzn2 |
| Amazon Linux · 2 | kernel-debuginfo-common-aarch64 | 0:4.14.123-111.109.amzn2 |
| Amazon Linux · 2 | kernel-debuginfo-common-x86_64 | 0:4.14.123-111.109.amzn2 |
| Amazon Linux · 2 | kernel-devel | 0:4.14.123-111.109.amzn2 |
| Amazon Linux · 2 | kernel-headers | 0:4.14.123-111.109.amzn2 |
| Amazon Linux · 2 | kernel-tools | 0:4.14.123-111.109.amzn2 |
| Amazon Linux · 2 | kernel-tools-debuginfo | 0:4.14.123-111.109.amzn2 |
| Amazon Linux · 2 | kernel-tools-devel | 0:4.14.123-111.109.amzn2 |
| Amazon Linux · 2 | perf | 0:4.14.123-111.109.amzn2 |
| Amazon Linux · 2 | perf-debuginfo | 0:4.14.123-111.109.amzn2 |
| Amazon Linux · 2 | python-perf | 0:4.14.123-111.109.amzn2 |
| Amazon Linux · 2 | python-perf-debuginfo | 0:4.14.123-111.109.amzn2 |
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…