CVE-2016-4429

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-06-10 · updated 2026-06-17
Weakness: CWE-787

Description

Stack-based buffer overflow in the clntudp_call function in sunrpc/clnt_udp.c in the GNU C Library (aka glibc or libc6) allows remote servers to cause a denial of service (crash) or possibly unspecified other impact via a flood of crafted ICMP and UDP packets.

Affected products

Canonical Ubuntu Linux: 12.04, 14.04, 16.04, 18.04
GNU C Library (glibc): before 2.24 — fixed in 2.24
openSUSE Leap: 42.1
Opensuse: 13.2

How to fix

Upgrade to a fixed version: GNU C Library (glibc) 2.24. Check the vendor advisory for mitigations.

References

http://lists.opensuse.org/opensuse-updates/2016-06/msg00030.html
http://lists.opensuse.org/opensuse-updates/2016-07/msg00039.html
http://www-01.ibm.com/support/docview.wss?uid=swg21995039
http://www.securityfocus.com/bid/102073
https://lists.debian.org/debian-lts-announce/2020/06/msg00027.html
https://source.android.com/security/bulletin/2017-12-01
https://sourceware.org/bugzilla/show_bug.cgi?id=20112
https://sourceware.org/git/gitweb.cgi?p=glibc.git%3Bh=bc779a1a5b3035133024b21e2f339fe4219fb11c
https://usn.ubuntu.com/3759-1/
https://usn.ubuntu.com/3759-2/
https://www.oracle.com//security-alerts/cpujul2021.html
http://lists.opensuse.org/opensuse-updates/2016-06/msg00030.html

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