Skip to content
Fencer Vulns
high 7.5

CVE-2017-8804 json

The xdr_bytes and xdr_string functions in the GNU C Library (aka glibc or libc6) 2.25 mishandle failures of buffer deserialization, which a…

published 2017-05-07 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-17747

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
7.7%
EPSS 7.7% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

The xdr_bytes and xdr_string functions in the GNU C Library (aka glibc or libc6) 2.25 mishandle failures of buffer deserialization, which allows remote attackers to cause a denial of service (virtual memory allocation, or memory consumption if an overcommit setting is not used) via a crafted UDP packet to port 111, a related issue to CVE-2017-8779. NOTE: [Information provided from upstream and references

Patch / fix

  • glibc SLES for SAP 11 SP4, SLES 11 SP4, SLES 11 SP3-TERADATA +3 more 2.11.3-17.110.6.2
  • glibc SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES for Raspberry Pi 12 SP2 +6 more 2.22-62.6.2

suse advisories SUSE-SU-2018:0565-1SUSE-SU-2018:0451-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2017-8804 updated cvss 7.5

glibc: memory leak in sunrpc when decoding malformed XDR

  • Red Hat Enterprise Linux 5 glibc, compat-glibc Red Hat Enterprise Linux 6 nscd, glibc, glibc-utils, compat-glibc, glibc-common Red Hat Enterprise Linux 7 nscd, glibc, glibc-utils, compat-glibc, glibc-common
    affected: no fix planned “Will not fix”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

7.67% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-502 Deserialization of Untrusted Data

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.