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Fencer Vulns
critical 9.8

CVE-2018-11574 json

Improper input validation together with an integer overflow in the EAP-TLS protocol implementation in PPPD may cause a crash, information d…

published 2018-06-14 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-3600

cvss
9.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.9%
EPSS 1.9% chance of exploitation in 30 days, percentile 79%
public exploits
0
none known

Summary

Improper input validation together with an integer overflow in the EAP-TLS protocol implementation in PPPD may cause a crash, information disclosure, or authentication bypass. This implementation is distributed as a patch for PPPD 0.91, and includes the affected eap.c and eap-tls.c files. Configurations that use the `refuse-app` option are unaffected.

Patch / fix

  • point-to-point_protocol_project point-to-point_protocol 2.4.9
  • ppp Debian 14, Debian 13, Debian 12 2.4.7-2+3

debian advisories DEBIAN-CVE-2018-11574

  • ppp Ubuntu 14.04 LTS 2.4.5-5.1ubuntu2.3
  • ppp Ubuntu 16.04 LTS 2.4.7-1+2ubuntu1.16.04.1
  • ppp Ubuntu 18.04 LTS 2.4.7-2+2ubuntu1.1

ubuntu advisories UBUNTU-CVE-2018-11574

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2018-11574 updated cvss 7.5

ppp: Remote client crash in ppp EAP-TLS patch

  • Red Hat Enterprise Linux 7 ppp
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux 5 ppp Red Hat Enterprise Linux 6 ppp Red Hat Enterprise Linux 8 ppp, network-scripts-ppp
    not affected: vulnerable code not present

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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
11 mo ago

Exploit prediction

1.87% chance of exploitation in the next 30 days, higher than 79% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound
  • CWE-20 Improper Input Validation

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.