# CVE-2011-1011: Privilege escalation in n/a > Local attackers can exploit improper /tmp directory permissions in seunshare to replace files, potentially gaining privileges or causing denial of service. - **Severity:** Medium 6.9 (`AV:L/AC:M/Au:N/C:C/I:C/A:C`) - **Exploited in the wild:** Not known - **Login needed:** Any signed-in user - **Attackable:** Local or same network only - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 24 Feb 2011 - **Updated:** 6 Aug 2024 - **Also known as:** GHSA-7fgm-8fq2-6xv7, RHSA-2011:0414 ## What is CVE-2011-1011? CVE-2011-1011 is a medium-severity vulnerability in Redhat Enterprise Linux, published on 24 Feb 2011. It can only be exploited from the same machine or local network, with no action from the victim. ### Official description The seunshare_mount function in sandbox/seunshare.c in seunshare in certain Red Hat packages of policycoreutils 2.0.83 and earlier in Red Hat Enterprise Linux (RHEL) 6 and earlier, and Fedora 14 and earlier, mounts a new directory on top of /tmp without assigning root ownership and the sticky bit to this new directory, which allows local users to replace or delete arbitrary /tmp files, and consequently cause a denial of service or possibly gain privileges, by running a setuid application that relies on /tmp, as demonstrated by the ksu application. Weakness: CWE-264 ## Which versions are affected by CVE-2011-1011? It affects 3 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `policycoreutils` | Red Hat:enterprise_linux:6::client | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-debuginfo` | Red Hat:enterprise_linux:6::client | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-gui` | Red Hat:enterprise_linux:6::client | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-newrole` | Red Hat:enterprise_linux:6::client | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-python` | Red Hat:enterprise_linux:6::client | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-sandbox` | Red Hat:enterprise_linux:6::client | All versions | 0:2.0.83-19.8.el6_0 | | `selinux-policy` | Red Hat:enterprise_linux:6::client | All versions | 0:3.7.19-54.el6_0.5 | | `selinux-policy-doc` | Red Hat:enterprise_linux:6::client | All versions | 0:3.7.19-54.el6_0.5 | | `selinux-policy-minimum` | Red Hat:enterprise_linux:6::client | All versions | 0:3.7.19-54.el6_0.5 | | `selinux-policy-mls` | Red Hat:enterprise_linux:6::client | All versions | 0:3.7.19-54.el6_0.5 | | `selinux-policy-targeted` | Red Hat:enterprise_linux:6::client | All versions | 0:3.7.19-54.el6_0.5 | | `policycoreutils` | Red Hat:enterprise_linux:6::computenode | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-debuginfo` | Red Hat:enterprise_linux:6::computenode | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-gui` | Red Hat:enterprise_linux:6::computenode | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-newrole` | Red Hat:enterprise_linux:6::computenode | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-python` | Red Hat:enterprise_linux:6::computenode | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-sandbox` | Red Hat:enterprise_linux:6::computenode | All versions | 0:2.0.83-19.8.el6_0 | | `selinux-policy` | Red Hat:enterprise_linux:6::computenode | All versions | 0:3.7.19-54.el6_0.5 | | `selinux-policy-doc` | Red Hat:enterprise_linux:6::computenode | All versions | 0:3.7.19-54.el6_0.5 | | `selinux-policy-minimum` | Red Hat:enterprise_linux:6::computenode | All versions | 0:3.7.19-54.el6_0.5 | | `selinux-policy-mls` | Red Hat:enterprise_linux:6::computenode | All versions | 0:3.7.19-54.el6_0.5 | | `selinux-policy-targeted` | Red Hat:enterprise_linux:6::computenode | All versions | 0:3.7.19-54.el6_0.5 | | `policycoreutils` | Red Hat:enterprise_linux:6::server | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-debuginfo` | Red Hat:enterprise_linux:6::server | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-gui` | Red Hat:enterprise_linux:6::server | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-newrole` | Red Hat:enterprise_linux:6::server | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-python` | Red Hat:enterprise_linux:6::server | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-sandbox` | Red Hat:enterprise_linux:6::server | All versions | 0:2.0.83-19.8.el6_0 | | `selinux-policy` | Red Hat:enterprise_linux:6::server | All versions | 0:3.7.19-54.el6_0.5 | | `selinux-policy-doc` | Red Hat:enterprise_linux:6::server | All versions | 0:3.7.19-54.el6_0.5 | | `selinux-policy-minimum` | Red Hat:enterprise_linux:6::server | All versions | 0:3.7.19-54.el6_0.5 | | `selinux-policy-mls` | Red Hat:enterprise_linux:6::server | All versions | 0:3.7.19-54.el6_0.5 | | `selinux-policy-targeted` | Red Hat:enterprise_linux:6::server | All versions | 0:3.7.19-54.el6_0.5 | | `policycoreutils` | Red Hat:enterprise_linux:6::workstation | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-debuginfo` | Red Hat:enterprise_linux:6::workstation | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-gui` | Red Hat:enterprise_linux:6::workstation | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-newrole` | Red Hat:enterprise_linux:6::workstation | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-python` | Red Hat:enterprise_linux:6::workstation | All versions | 0:2.0.83-19.8.el6_0 | | `policycoreutils-sandbox` | Red Hat:enterprise_linux:6::workstation | All versions | 0:2.0.83-19.8.el6_0 | | `selinux-policy` | Red Hat:enterprise_linux:6::workstation | All versions | 0:3.7.19-54.el6_0.5 | Products: Redhat Enterprise Linux, Redhat Fedora, Redhat Policycoreutils. ## How do I fix CVE-2011-1011? Apply the vendor's patch. ## Is CVE-2011-1011 being exploited? There is no known exploitation of CVE-2011-1011 in the wild and no public exploit code. ## Other vulnerabilities in Redhat Enterprise Linux - [CVE-2018-14667](https://insights.sbomify.com/CVE-2018-14667/): Red Hat JBoss RichFaces Framework Expression Language Injection (critical 9.8, exploited in the wild) - [CVE-2021-20325](https://insights.sbomify.com/CVE-2021-20325/): Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a securit (critical 9.8) - [CVE-2018-25011](https://insights.sbomify.com/CVE-2018-25011/): Memory corruption in libwebp (critical 9.8) - [CVE-2018-25014](https://insights.sbomify.com/CVE-2018-25014/): Other in libwebp (critical 9.8) - [CVE-2014-3585](https://insights.sbomify.com/CVE-2014-3585/): Supply chain in redhat-upgrade-tool (critical 9.8) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2011-1011 and fix it if it is affected. What it is: CVE-2011-1011 is a medium-severity vulnerability in Redhat Enterprise Linux, published on 24 Feb 2011. It can only be exploited from the same machine or local network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2011-1011 in the wild and no public exploit code. Affected product: Redhat Enterprise 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-2011-1011/ (Markdown: https://insights.sbomify.com/CVE-2011-1011/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2011-1011 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-1011 - OSV: https://osv.dev/vulnerability/CVE-2011-1011 --- From sbomify Insights: https://insights.sbomify.com/CVE-2011-1011/ Summaries are generated and may contain mistakes; the official description above is the record.