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Fencer Intel
high 7.5

CVE-2018-17962 json

Qemu has a Buffer Overflow in pcnet_receive in hw/net/pcnet.c because an incorrect integer data type is used.

published 8y ago modified 4mo ago also EUVD-2018-9702

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
4.5%
EPSS 4.5% chance of exploitation in 30 days, percentile 91%
public exploits
0
none known

Summary

Qemu has a Buffer Overflow in pcnet_receive in hw/net/pcnet.c because an incorrect integer data type is used.

Patch / fix

  • qemu Debian 14, Debian 13, Debian 12 1:3.1+dfsg-1

debian advisories DEBIAN-CVE-2018-17962

  • qemu Ubuntu 14.04 LTS 2.0.0+dfsg-2ubuntu1.44
  • qemu Ubuntu 16.04 LTS 1:2.5+dfsg-5ubuntu10.33
  • qemu Ubuntu 18.04 LTS 1:2.11+dfsg-1ubuntu7.8

ubuntu advisories UBUNTU-CVE-2018-17962

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

  • qemu-kvm RHEL 6 2:0.12.1.2-2.506.el6_10.5
  • qemu-img RHEL 6 2:0.12.1.2-2.506.el6_10.5
  • qemu-kvm-tools RHEL 6 2:0.12.1.2-2.506.el6_10.5
  • qemu-guest-agent RHEL 6 2:0.12.1.2-2.506.el6_10.5

red hat advisories RHSA-2019:2892

  • xen SLE Point of Sale 11 SP3 4.2.5_21-45.30.1
  • xen SLES for SAP 11 SP4, SLES 11 SP4, SLE Software Development Kit 11 SP4 4.4.4_38-61.40.1
  • qemu SLES for SAP 12 SP2, SLES 12 SP2-LTSS, SLES 12 SP2-BCL +2 more 2.6.2-41.46.2
  • qemu SLES for SAP 12 SP4, SLES 12 SP4, SLED 12 SP4 2.11.2-5.5.1
  • qemu SLES for SAP 12 SP3, SLES 12 SP3, SLED 12 SP3 2.9.1-6.22.3
  • kvm SLES 11 SP3-TERADATA, SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 1.4.2-53.26.2
  • kvm SLES for SAP 11 SP4, SLES 11 SP4 1.4.2-60.18.2
  • qemu SLE Module for Server Applications 15, SLE Module for Basesystem 15 2.11.2-9.12.2

suse advisories SUSE-SU-2018:3973-2SUSE-SU-2019:14011-1SUSE-SU-2019:0827-1SUSE-SU-2019:0825-1SUSE-SU-2019:13921-1SUSE-SU-2018:4237-1

Is CVE-2018-17962 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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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-2018-17962 updated cvss 6.5

QEMU: pcnet: integer overflow leads to buffer overflow

  • Red Hat Enterprise Linux Desktop (v. 6) qemu-img 0.12.1.2-2.506.el6_10.5, qemu-kvm 0.12.1.2-2.506.el6_10.5, qemu-kvm-tools 0.12.1.2-2.506.el6_10.5, qemu-guest-agent 0.12.1.2-2.506.el6_10.5 Red Hat Enterprise Linux HPC Node (v. 6) qemu-img 0.12.1.2-2.506.el6_10.5, qemu-kvm 0.12.1.2-2.506.el6_10.5, qemu-kvm-tools 0.12.1.2-2.506.el6_10.5, qemu-guest-agent 0.12.1.2-2.506.el6_10.5 Red Hat Enterprise Linux Server (v. 6) qemu-img 0.12.1.2-2.506.el6_10.5, qemu-kvm 0.12.1.2-2.506.el6_10.5, qemu-kvm-tools 0.12.1.2-2.506.el6_10.5, qemu-guest-agent 0.12.1.2-2.506.el6_10.5 Red Hat Enterprise Linux Workstation (v. 6) qemu-img 0.12.1.2-2.506.el6_10.5, qemu-kvm 0.12.1.2-2.506.el6_10.5, qemu-kvm-tools 0.12.1.2-2.506.el6_10.5, qemu-guest-agent 0.12.1.2-2.506.el6_10.5
    fixed: vendor fix RHSA-2019:2892
  • Red Hat Enterprise Linux 5 kvm Red Hat Enterprise Linux 7 qemu-img, qemu-kvm, libcacard, qemu-img-ma, qemu-kvm-ma, qemu-kvm-rhev, +6 more
    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

Exploit prediction

4.50% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • lists.gnu.org https://lists.gnu.org/archive/html/qemu-devel/2018-09/msg03268.html referenced PoC, tagged "exploit" by a source, unverified

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 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Intel 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.