qemu: vnc: insufficient resource limiting in VNC websockets decoder
Published Jan 12, 2016
8.6
HIGHCVSS 3.1
EPSS 6.57%
Description
The VNC websocket frame decoder in QEMU allows remote attackers to cause a denial of service (memory and CPU consumption) via a large (1) websocket payload or (2) HTTP headers section.
Affected products
No data.
Configuration 1
Configuration 2
- 12.04
- 14.04
- 14.10
- 15.04
Configuration 3
- 7.0
- 8.0
Configuration 4
- 21
- 22
Configuration 5
- 7.1
- 7.2
- 7.3
- 7.4
- 7.5
- 7.6
- 7.7
- 7.0
- 7.3
- 7.4
- 7.6
- 7.7
- 7.3
- 7.6
- 7.7
- 7.0
Configuration 6
- 3.0
Running on/with
- 7.0
No data.
RHEV 3.X Hypervisor and Agents for RHEL-7
qemu-kvm-rhev-10:2.1.2-23.el7_1.10
Fixed · RHSA-2015:1931
Red Hat Enterprise Linux 7
qemu-kvm-10:1.5.3-86.el7_1.8
Fixed · RHSA-2015:1943
Red Hat Enterprise Linux 5
kvm
Not affected
Red Hat Enterprise Linux 6
qemu-kvm
Not affected
Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse)
qemu-kvm-rhev
Affected
Red Hat Enterprise Linux OpenStack Platform 6 (Juno)
qemu-kvm-rhev
Affected
Red Hat OpenStack Platform 4
qemu-kvm-rhev
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| RHEV 3.X Hypervisor and Agents for RHEL-7 | qemu-kvm-rhev-10:2.1.2-23.el7_1.10 | Fixed | RHSA-2015:1931 |
| Red Hat Enterprise Linux 7 | qemu-kvm-10:1.5.3-86.el7_1.8 | Fixed | RHSA-2015:1943 |
| Red Hat Enterprise Linux 5 | kvm | Not affected | n/a |
| Red Hat Enterprise Linux 6 | qemu-kvm | Not affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 5 (Icehouse) | qemu-kvm-rhev | Affected | n/a |
| Red Hat Enterprise Linux OpenStack Platform 6 (Juno) | qemu-kvm-rhev | Affected | n/a |
| Red Hat OpenStack Platform 4 | qemu-kvm-rhev | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue did not affect the kvm and qemu-kvm packages as shipped with Red Hat Enterprise Linux 5 and 6.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:N/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (13 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 6.57% (0.06571) | 93.62th | v5 (v2026.06.15) |
| Jun 15, 2026 | 7.39% (0.07393) | 93.61th | v5 (v2026.06.15) |
| Apr 17, 2025 | 5.08% (0.05081) | 89.20th | v4 (v2025.03.14) |
| Mar 17, 2025 | 6.44% (0.06436) | 90.36th | v4 (v2025.03.14) |
| Dec 12, 2024 | 1.10% (0.01101) | 85.08th | v3 (v2023.03.01) |
| Nov 4, 2023 | 1.10% (0.01101) | 82.88th | v3 (v2023.03.01) |
| Aug 30, 2023 | 1.08% (0.01081) | 82.48th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.80% (0.00802) | 79.00th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.78% (0.03779) | 85.48th | v2 (v2022.01.01) |
| Feb 13, 2023 | 3.78% (0.03779) | 85.08th | v2 (v2022.01.01) |
| Feb 3, 2023 | 2.69% (0.02686) | 82.44th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.78% (0.03779) | 84.01th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.78% (0.03779) | 67.21th | v2 (v2022.01.01) |
References (21)
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154656.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155196.html vendor-advisoryx_refsource_FEDORAThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00033.html vendor-advisoryx_refsource_SUSEBroken Link
- http://lists.opensuse.org/opensuse-security-announce/2015-05/msg00042.html vendor-advisoryx_refsource_SUSEBroken Link
- http://rhn.redhat.com/errata/RHSA-2015-1931.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2015-1943.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.debian.org/security/2015/dsa-3259 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.openwall.com/lists/oss-security/2015/03/24/9 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2015/04/09/6 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/73303 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1033975 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2608-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2015-1779 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1199572 Issue Tracking
- https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg04894.html mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg04895.html mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- https://lists.gnu.org/archive/html/qemu-devel/2015-03/msg04896.html mailing-listx_refsource_MLISTMailing ListPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-1779
- https://security.gentoo.org/glsa/201602-01 vendor-advisoryx_refsource_GENTOOThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2015-1779
Change history (0)
No recorded changes yet.