CVE-2019-11477

NameCVE-2019-11477
DescriptionJonathan 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-1823-1, DLA-1824-1, DSA-4465-1
NVD severityhigh (attack range: remote)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
linux (PTS)jessie3.16.56-1+deb8u1vulnerable
jessie (security)3.16.68-2fixed
stretch4.9.168-1vulnerable
stretch (security)4.9.168-1+deb9u4fixed
bullseye, buster4.19.37-5fixed
buster (security)4.19.37-5+deb10u1fixed
sid4.19.37-6fixed
linux-4.9 (PTS)jessie (security)4.9.168-1+deb9u3~deb8u1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
linuxsource(unstable)4.19.37-4high
linuxsourcejessie3.16.68-2highDLA-1823-1
linuxsourcestretch4.9.168-1+deb9u3highDSA-4465-1
linux-4.9sourcejessie4.9.168-1+deb9u3~deb8u1highDLA-1824-1

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