# CVE-2011-1530: Null dereference in n/a > Remote authenticated users can crash the Kerberos KDC daemon via a crafted TGS request, causing denial of service. - **Severity:** Medium 6.8 (`AV:N/AC:L/Au:S/C:N/I:N/A:C`) - **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:** 8 Dec 2011 - **Updated:** 6 Aug 2024 - **Also known as:** DEBIAN-CVE-2011-1530, GHSA-3vf4-p6xq-xxr9, RHSA-2011:1790 ## What is CVE-2011-1530? CVE-2011-1530 is a medium-severity vulnerability in n/a, published on 8 Dec 2011. Any signed-in user can exploit it over the network, with no action from the victim. ### Official description The process_tgs_req function in do_tgs_req.c in the Key Distribution Center (KDC) in MIT Kerberos 5 (aka krb5) 1.9 through 1.9.2 allows remote authenticated users to cause a denial of service (NULL pointer dereference and daemon crash) via a crafted TGS request that triggers an error other than the KRB5_KDB_NOENTRY error. Weakness: CWE-399 ## Which versions are affected by CVE-2011-1530? It affects 1 product. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `krb5` | Red Hat:enterprise_linux:6::client | All versions | 0:1.9-22.el6_2.1 | | `krb5-debuginfo` | Red Hat:enterprise_linux:6::client | All versions | 0:1.9-22.el6_2.1 | | `krb5-devel` | Red Hat:enterprise_linux:6::client | All versions | 0:1.9-22.el6_2.1 | | `krb5-libs` | Red Hat:enterprise_linux:6::client | All versions | 0:1.9-22.el6_2.1 | | `krb5-pkinit-openssl` | Red Hat:enterprise_linux:6::client | All versions | 0:1.9-22.el6_2.1 | | `krb5-server` | Red Hat:enterprise_linux:6::client | All versions | 0:1.9-22.el6_2.1 | | `krb5-server-ldap` | Red Hat:enterprise_linux:6::client | All versions | 0:1.9-22.el6_2.1 | | `krb5-workstation` | Red Hat:enterprise_linux:6::client | All versions | 0:1.9-22.el6_2.1 | | `krb5` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.9-22.el6_2.1 | | `krb5-debuginfo` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.9-22.el6_2.1 | | `krb5-devel` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.9-22.el6_2.1 | | `krb5-libs` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.9-22.el6_2.1 | | `krb5-pkinit-openssl` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.9-22.el6_2.1 | | `krb5-server` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.9-22.el6_2.1 | | `krb5-server-ldap` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.9-22.el6_2.1 | | `krb5-workstation` | Red Hat:enterprise_linux:6::computenode | All versions | 0:1.9-22.el6_2.1 | | `krb5` | Red Hat:enterprise_linux:6::server | All versions | 0:1.9-22.el6_2.1 | | `krb5-debuginfo` | Red Hat:enterprise_linux:6::server | All versions | 0:1.9-22.el6_2.1 | | `krb5-devel` | Red Hat:enterprise_linux:6::server | All versions | 0:1.9-22.el6_2.1 | | `krb5-libs` | Red Hat:enterprise_linux:6::server | All versions | 0:1.9-22.el6_2.1 | | `krb5-pkinit-openssl` | Red Hat:enterprise_linux:6::server | All versions | 0:1.9-22.el6_2.1 | | `krb5-server` | Red Hat:enterprise_linux:6::server | All versions | 0:1.9-22.el6_2.1 | | `krb5-server-ldap` | Red Hat:enterprise_linux:6::server | All versions | 0:1.9-22.el6_2.1 | | `krb5-workstation` | Red Hat:enterprise_linux:6::server | All versions | 0:1.9-22.el6_2.1 | | `krb5` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.9-22.el6_2.1 | | `krb5-debuginfo` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.9-22.el6_2.1 | | `krb5-devel` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.9-22.el6_2.1 | | `krb5-libs` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.9-22.el6_2.1 | | `krb5-pkinit-openssl` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.9-22.el6_2.1 | | `krb5-server` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.9-22.el6_2.1 | | `krb5-server-ldap` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.9-22.el6_2.1 | | `krb5-workstation` | Red Hat:enterprise_linux:6::workstation | All versions | 0:1.9-22.el6_2.1 | Products: Mit Mit Kerberos. ## How do I fix CVE-2011-1530? Apply the vendor's patch. ## Is CVE-2011-1530 being exploited? There is no known exploitation of CVE-2011-1530 in the wild and no public exploit code. ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2011-1530 and fix it if it is affected. What it is: CVE-2011-1530 is a medium-severity vulnerability in n/a, published on 8 Dec 2011. Any signed-in user can exploit it over the network, with no action from the victim. Exploitation: There is no known exploitation of CVE-2011-1530 in the wild and no public exploit code. Affected product: n/a. 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-2011-1530/ (Markdown: https://insights.sbomify.com/CVE-2011-1530/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2011-1530 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-1530 - OSV: https://osv.dev/vulnerability/CVE-2011-1530 --- From sbomify Insights: https://insights.sbomify.com/CVE-2011-1530/ Summaries are generated and may contain mistakes; the official description above is the record.