# CVE-2011-0285: Use after free in n/a > Remote attackers can execute arbitrary code or crash the Kerberos admin daemon via a crafted password change request due to an invalid pointer free. - **Severity:** Critical 10.0 (`AV:N/AC:L/Au:N/C:C/I:C/A:C`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 15 Apr 2011 - **Updated:** 6 Aug 2024 - **Also known as:** DEBIAN-CVE-2011-0285, GHSA-rh86-pqp5-j43v, RHSA-2011:0447 ## What is CVE-2011-0285? CVE-2011-0285 is a critical use after free vulnerability in Mit Kerberos 5, published on 15 Apr 2011. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description The process_chpw_request function in schpw.c in the password-changing functionality in kadmind in MIT Kerberos 5 (aka krb5) 1.7 through 1.9 frees an invalid pointer, which allows remote attackers to execute arbitrary code or cause a denial of service (daemon crash) via a crafted request that triggers an error condition. Weakness: CWE-20 (Improper Input Validation) ## Which versions are affected by CVE-2011-0285? It affects 1 product. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `krb5` | Red Hat:enterprise_linux:6::client | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-debuginfo` | Red Hat:enterprise_linux:6::client | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-devel` | Red Hat:enterprise_linux:6::client | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-libs` | Red Hat:enterprise_linux:6::client | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-pkinit-openssl` | Red Hat:enterprise_linux:6::client | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-server` | Red Hat:enterprise_linux:6::client | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-server-ldap` | Red Hat:enterprise_linux:6::client | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-workstation` | Red Hat:enterprise_linux:6::client | All versions | 0:1.8.2-3.el6_0.7 | | `krb5` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-debuginfo` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-devel` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-libs` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-pkinit-openssl` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-server` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-server-ldap` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-workstation` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.8.2-3.el6_0.7 | | `krb5` | Red Hat:enterprise_linux:6::server | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-debuginfo` | Red Hat:enterprise_linux:6::server | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-devel` | Red Hat:enterprise_linux:6::server | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-libs` | Red Hat:enterprise_linux:6::server | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-pkinit-openssl` | Red Hat:enterprise_linux:6::server | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-server` | Red Hat:enterprise_linux:6::server | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-server-ldap` | Red Hat:enterprise_linux:6::server | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-workstation` | Red Hat:enterprise_linux:6::server | All versions | 0:1.8.2-3.el6_0.7 | | `krb5` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-debuginfo` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-devel` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-libs` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-pkinit-openssl` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-server` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-server-ldap` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.8.2-3.el6_0.7 | | `krb5-workstation` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.8.2-3.el6_0.7 | Products: Mit Kerberos 5. ## How do I fix CVE-2011-0285? Apply the vendor's patch. ## Is CVE-2011-0285 being exploited? It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-0285 exists. Public exploit code: - MIT Kerberos 5 - kadmind Change Password Feature Remote Code Execution (exploitdb) ## Other vulnerabilities in Mit Kerberos 5 - [CVE-2008-0947](https://insights.sbomify.com/CVE-2008-0947/): Memory corruption in n/a (critical 10.0) - [CVE-2007-5902](https://insights.sbomify.com/CVE-2007-5902/): Integer overflow in n/a (critical 10.0) - [CVE-2007-4743](https://insights.sbomify.com/CVE-2007-4743/): Memory corruption in n/a (critical 10.0) - [CVE-2007-3999](https://insights.sbomify.com/CVE-2007-3999/): Memory corruption in n/a (critical 10.0) - [CVE-2000-0514](https://insights.sbomify.com/CVE-2000-0514/): Missing authorization in n/a (critical 10.0) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2011-0285 and fix it if it is affected. What it is: CVE-2011-0285 is a critical use after free vulnerability in Mit Kerberos 5, published on 15 Apr 2011. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2011-0285 exists. Affected product: Mit Kerberos 5. 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-2011-0285/ (Markdown: https://insights.sbomify.com/CVE-2011-0285/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2011-0285 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-0285 - OSV: https://osv.dev/vulnerability/CVE-2011-0285 --- From sbomify Insights: https://insights.sbomify.com/CVE-2011-0285/ Summaries are generated and may contain mistakes; the official description above is the record.