Vulnerability-Lookup

RHSA-2017:1430

Vulnerability from csaf_redhat - Published: 2017-06-13 07:26 - Updated: 2025-11-21 18:00

Summary

Red Hat Security Advisory: qemu-kvm security and bug fix update

Severity

Important

Notes

Topic: An update for qemu-kvm is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm package provides the user-space component for running virtual machines that use KVM. Security Fix(es): * An out-of-bounds r/w access issue was found in QEMU's Cirrus CLGD 54xx VGA Emulator support. The vulnerability could occur while copying VGA data via various bitblt functions. A privileged user inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process. (CVE-2017-7980) * An out-of-bounds access issue was found in QEMU's Cirrus CLGD 54xx VGA Emulator support. The vulnerability could occur while copying VGA data using bitblt functions (for example, cirrus_bitblt_rop_fwd_transp_). A privileged user inside a guest could use this flaw to crash the QEMU process, resulting in denial of service. (CVE-2017-7718) Red Hat would like to thank Jiangxin (PSIRT Huawei Inc) and Li Qiang (Qihoo 360 Gear Team) for reporting CVE-2017-7980 and Jiangxin (PSIRT Huawei Inc) for reporting CVE-2017-7718. Bug Fix(es): * Previously, guest virtual machines in some cases became unresponsive when the "pty" back end of a serial device performed an irregular I/O communication. This update improves the handling of serial I/O on guests, which prevents the described problem from occurring. (BZ#1452332)

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2017-7718

An out-of-bounds access issue was found in QEMU's Cirrus CLGD 54xx VGA Emulator support. The vulnerability could occur while copying VGA data using bitblt functions (for example, cirrus_bitblt_rop_fwd_transp_). A privileged user inside a guest could use this flaw to crash the QEMU process, resulting in denial of service.

4.0 (Medium)


                        
                          CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:L

CWE-125 - Out-of-bounds Read

Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect. https://access.redhat.com/errata/RHSA-2017:1430

CVE-2017-7980

An out-of-bounds r/w access issue was found in QEMU's Cirrus CLGD 54xx VGA Emulator support. The vulnerability could occur while copying VGA data via various bitblt functions. A privileged user inside a guest could use this flaw to crash the QEMU process or, potentially, execute arbitrary code on the host with privileges of the QEMU process.

5.5 (Medium)


                        
                          CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L

CWE-787 - Out-of-bounds Write

References

URL

Category

	https://access.redhat.com/errata/RHSA-2017:1430	self
	https://access.redhat.com/security/updates/classi…	external
	https://bugzilla.redhat.com/show_bug.cgi?id=1443441	external
	https://bugzilla.redhat.com/show_bug.cgi?id=1444371	external
	https://bugzilla.redhat.com/show_bug.cgi?id=1452332	external
	https://security.access.redhat.com/data/csaf/v2/a…	self
	https://access.redhat.com/security/cve/CVE-2017-7718	self
	https://bugzilla.redhat.com/show_bug.cgi?id=1443441	external
	https://www.cve.org/CVERecord?id=CVE-2017-7718	external
	https://nvd.nist.gov/vuln/detail/CVE-2017-7718	external
	https://access.redhat.com/security/cve/CVE-2017-7980	self
	https://bugzilla.redhat.com/show_bug.cgi?id=1444371	external
	https://www.cve.org/CVERecord?id=CVE-2017-7980	external
	https://nvd.nist.gov/vuln/detail/CVE-2017-7980	external

Acknowledgments

PSIRT Huawei Inc. Jiangxin

Qihoo 360 Gear Team Li Qiang

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          "title": "Vulnerability summary"
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          "category": "general",
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          "url": "https://access.redhat.com/errata/RHSA-2017:1430"
        }
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            "integrityImpact": "PARTIAL",
            "vectorString": "AV:A/AC:M/Au:S/C:P/I:P/A:P",
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            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L",
            "version": "3.0"
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        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "Qemu: display: cirrus: OOB r/w access issues in bitblt routines"
    }
  ]
}

CVE-2017-7980 (GCVE-0-2017-7980)

Vulnerability from cvelistv5 – Published: 2017-07-25 14:00 – Updated: 2024-08-05 16:19

Summary

Heap-based buffer overflow in Cirrus CLGD 54xx VGA Emulator in Quick Emulator (Qemu) 2.8 and earlier allows local guest OS users to execute arbitrary code or cause a denial of service (crash) via vectors related to a VNC client updating its display after a VGA operation.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

CVE-2017-7718 (GCVE-0-2017-7718)

Vulnerability from cvelistv5 – Published: 2017-04-20 17:00 – Updated: 2024-08-05 16:12

Summary

hw/display/cirrus_vga_rop.h in QEMU (aka Quick Emulator) allows local guest OS privileged users to cause a denial of service (out-of-bounds read and QEMU process crash) via vectors related to copying VGA data via the cirrus_bitblt_rop_fwd_transp_ and cirrus_bitblt_rop_fwd_ functions.

Severity ?

No CVSS data available.

CWE

Assigner

mitre

References

URL

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2017:1430

CVE-2017-7980 (GCVE-0-2017-7980)

CVE-2017-7718 (GCVE-0-2017-7718)

Tags

Sightings

Nomenclature