Name | CVE-2018-5391 |
Description | The Linux kernel, versions 3.9+, is vulnerable to a denial of service attack with low rates of specially modified packets targeting IP fragment re-assembly. An attacker may cause a denial of service condition by sending specially crafted IP fragments. Various vulnerabilities in IP fragmentation have been discovered and fixed over the years. The current vulnerability (CVE-2018-5391) became exploitable in the Linux kernel with the increase of the IP fragment reassembly queue size. |
Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
References | DLA-1466-1, DLA-1529-1, DLA-1715-1, DSA-4272-1, ELA-50-1 |
The table below lists information on source packages.
Source Package | Release | Version | Status |
---|---|---|---|
linux (PTS) | jessie, jessie (lts) | 3.16.84-1 | fixed |
stretch (security) | 4.9.320-2 | fixed | |
stretch (lts), stretch | 4.9.320-3 | fixed | |
buster (security), buster, buster (lts) | 4.19.316-1 | fixed | |
bullseye | 5.10.223-1 | fixed | |
bullseye (security) | 5.10.226-1 | fixed | |
bookworm | 6.1.106-3 | fixed | |
bookworm (security) | 6.1.112-1 | fixed | |
trixie | 6.10.11-1 | fixed | |
sid | 6.11.2-1 | fixed | |
linux-4.9 (PTS) | jessie, jessie (lts) | 4.9.303-1~deb8u3 | fixed |
The information below is based on the following data on fixed versions.
Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
---|---|---|---|---|---|---|
linux | source | wheezy | (unfixed) | end-of-life | ||
linux | source | jessie | 3.16.59-1 | DLA-1529-1 | ||
linux | source | stretch | 4.9.110-3+deb9u2 | DSA-4272-1 | ||
linux | source | (unstable) | 4.17.15-1 | |||
linux-4.9 | source | jessie | 4.9.144-3.1~deb8u1 | DLA-1715-1 |
Mitigation: Change the default values of net.ipv4.ipfrag_high_thresh and
net.ipv4.ipfrag_low_thresh back to 256kB and 192 kB (respectively) or
below.