# CVE-2020-1711: Memory corruption in QEMU > A remote attacker can crash QEMU or execute arbitrary code via a malicious iSCSI server response due to an out-of-bounds heap buffer access. - **Severity:** High 7.7 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 11 Feb 2020 - **Updated:** 4 Aug 2024 - **Also known as:** DEBIAN-CVE-2020-1711, GHSA-8gvc-95pj-x5r8, RHSA-2020:0669, RHSA-2020:0731, RHSA-2020:0773, RHSA-2020:1505, RHSA-2020:2472, UBUNTU-CVE-2020-1711 ## What is CVE-2020-1711? CVE-2020-1711 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 11 Feb 2020. Any signed-in user can exploit it over the network, with no action from the victim. ### Official description An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU versions 2.12.0 before 4.2.1 handled a response coming from an iSCSI server while checking the status of a Logical Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process on the host. Weakness: CWE-787 (Out-of-bounds Write), CWE-122 (Heap-based Buffer Overflow) ## Which versions are affected by CVE-2020-1711? It affects 5 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `SLOF` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:20190703-1.gitba1ab360.module+el8.1.1+5309+6d656f05 | | `hivex` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.3.15-7.module+el8.1.1+5309+6d656f05 | | `hivex-debuginfo` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.3.15-7.module+el8.1.1+5309+6d656f05 | | `hivex-debugsource` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.3.15-7.module+el8.1.1+5309+6d656f05 | | `hivex-devel` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.3.15-7.module+el8.1.1+5309+6d656f05 | | `libguestfs` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-bash-completion` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-benchmarking` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-benchmarking-debuginfo` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-debuginfo` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-debugsource` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-devel` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-gfs2` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-gobject` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-gobject-debuginfo` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-gobject-devel` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-inspect-icons` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-java` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-java-debuginfo` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-java-devel` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-javadoc` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-man-pages-ja` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-man-pages-uk` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-rescue` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-rsync` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-tools` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-tools-c` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-tools-c-debuginfo` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libguestfs-winsupport` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:8.0-4.module+el8.1.1+5309+6d656f05 | | `libguestfs-xfs` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 1:1.40.2-16.module+el8.1.1+5309+6d656f05 | | `libiscsi` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.18.0-8.module+el8.1.1+5309+6d656f05 | | `libiscsi-debuginfo` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.18.0-8.module+el8.1.1+5309+6d656f05 | | `libiscsi-debugsource` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.18.0-8.module+el8.1.1+5309+6d656f05 | | `libiscsi-devel` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.18.0-8.module+el8.1.1+5309+6d656f05 | | `libiscsi-utils` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.18.0-8.module+el8.1.1+5309+6d656f05 | | `libiscsi-utils-debuginfo` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.18.0-8.module+el8.1.1+5309+6d656f05 | | `libnbd` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.0.3-1.module+el8.1.1+5659+15cacc69 | | `libnbd-debuginfo` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.0.3-1.module+el8.1.1+5659+15cacc69 | | `libnbd-debugsource` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.0.3-1.module+el8.1.1+5659+15cacc69 | | `libnbd-devel` | Red Hat:advanced_virtualization:8.1::el8 | All versions | 0:1.0.3-1.module+el8.1.1+5659+15cacc69 | Products: Debian Debian Linux, Opensuse Leap, Qemu Qemu, Redhat Enterprise Linux, Redhat Openstack. ## How do I fix CVE-2020-1711? Upgrade to a fixed version. ## Is CVE-2020-1711 being exploited? There is no known exploitation of CVE-2020-1711 in the wild and no public exploit code. ## Other vulnerabilities in Debian Debian Linux - [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild) - [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild) - [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild) - [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild) - [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2020-1711 and fix it if it is affected. What it is: CVE-2020-1711 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 11 Feb 2020. Any signed-in user can exploit it over the network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2020-1711 in the wild and no public exploit code. Affected product: Debian Debian Linux. No package-level version data is available, so check the vendor advisory linked from the reference page. Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2020-1711/ (Markdown: https://insights.sbomify.com/CVE-2020-1711/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2020-1711 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-1711 - OSV: https://osv.dev/vulnerability/CVE-2020-1711 --- From sbomify Insights: https://insights.sbomify.com/CVE-2020-1711/ Summaries are generated and may contain mistakes; the official description above is the record.