# CVE-2009-4212: Integer overflow in n/a > Remote attackers can cause a denial of service or execute arbitrary code in MIT Kerberos 5 by sending malformed ciphertext to the AES or RC4 decryption functions. - **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:** 13 Jan 2010 - **Updated:** 7 Aug 2024 - **Also known as:** DEBIAN-CVE-2009-4212, DSA-1969-1, GHSA-39cv-j24w-8wvf, RHSA-2010:0029 ## What is CVE-2009-4212? CVE-2009-4212 is a critical vulnerability in Mit Kerberos 5, published on 13 Jan 2010. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description Multiple integer underflows in the (1) AES and (2) RC4 decryption functionality in the crypto library in MIT Kerberos 5 (aka krb5) 1.3 through 1.6.3, and 1.7 before 1.7.1, allow remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code by providing ciphertext with a length that is too short to be valid. Weakness: CWE-189 ## Which versions are affected by CVE-2009-4212? It affects 2 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `krb5` | Red Hat:enterprise_linux:3::as | All versions | 0:1.2.7-71 | | `krb5-debuginfo` | Red Hat:enterprise_linux:3::as | All versions | 0:1.2.7-71 | | `krb5-devel` | Red Hat:enterprise_linux:3::as | All versions | 0:1.2.7-71 | | `krb5-libs` | Red Hat:enterprise_linux:3::as | All versions | 0:1.2.7-71 | | `krb5-server` | Red Hat:enterprise_linux:3::as | All versions | 0:1.2.7-71 | | `krb5-workstation` | Red Hat:enterprise_linux:3::as | All versions | 0:1.2.7-71 | | `krb5` | Red Hat:enterprise_linux:3::desktop | All versions | 0:1.2.7-71 | | `krb5-debuginfo` | Red Hat:enterprise_linux:3::desktop | All versions | 0:1.2.7-71 | | `krb5-devel` | Red Hat:enterprise_linux:3::desktop | All versions | 0:1.2.7-71 | | `krb5-libs` | Red Hat:enterprise_linux:3::desktop | All versions | 0:1.2.7-71 | | `krb5-server` | Red Hat:enterprise_linux:3::desktop | All versions | 0:1.2.7-71 | | `krb5-workstation` | Red Hat:enterprise_linux:3::desktop | All versions | 0:1.2.7-71 | | `krb5` | Red Hat:enterprise_linux:3::es | All versions | 0:1.2.7-71 | | `krb5-debuginfo` | Red Hat:enterprise_linux:3::es | All versions | 0:1.2.7-71 | | `krb5-devel` | Red Hat:enterprise_linux:3::es | All versions | 0:1.2.7-71 | | `krb5-libs` | Red Hat:enterprise_linux:3::es | All versions | 0:1.2.7-71 | | `krb5-server` | Red Hat:enterprise_linux:3::es | All versions | 0:1.2.7-71 | | `krb5-workstation` | Red Hat:enterprise_linux:3::es | All versions | 0:1.2.7-71 | | `krb5` | Red Hat:enterprise_linux:3::ws | All versions | 0:1.2.7-71 | | `krb5-debuginfo` | Red Hat:enterprise_linux:3::ws | All versions | 0:1.2.7-71 | | `krb5-devel` | Red Hat:enterprise_linux:3::ws | All versions | 0:1.2.7-71 | | `krb5-libs` | Red Hat:enterprise_linux:3::ws | All versions | 0:1.2.7-71 | | `krb5-server` | Red Hat:enterprise_linux:3::ws | All versions | 0:1.2.7-71 | | `krb5-workstation` | Red Hat:enterprise_linux:3::ws | All versions | 0:1.2.7-71 | | `krb5` | Red Hat:enterprise_linux:4::as | All versions | 0:1.3.4-62.el4_8.1 | | `krb5-debuginfo` | Red Hat:enterprise_linux:4::as | All versions | 0:1.3.4-62.el4_8.1 | | `krb5-devel` | Red Hat:enterprise_linux:4::as | All versions | 0:1.3.4-62.el4_8.1 | | `krb5-libs` | Red Hat:enterprise_linux:4::as | All versions | 0:1.3.4-62.el4_8.1 | | `krb5-server` | Red Hat:enterprise_linux:4::as | All versions | 0:1.3.4-62.el4_8.1 | | `krb5-workstation` | Red Hat:enterprise_linux:4::as | All versions | 0:1.3.4-62.el4_8.1 | | `krb5` | Red Hat:enterprise_linux:4::desktop | All versions | 0:1.3.4-62.el4_8.1 | | `krb5-debuginfo` | Red Hat:enterprise_linux:4::desktop | All versions | 0:1.3.4-62.el4_8.1 | | `krb5-devel` | Red Hat:enterprise_linux:4::desktop | All versions | 0:1.3.4-62.el4_8.1 | | `krb5-libs` | Red Hat:enterprise_linux:4::desktop | All versions | 0:1.3.4-62.el4_8.1 | | `krb5-server` | Red Hat:enterprise_linux:4::desktop | All versions | 0:1.3.4-62.el4_8.1 | | `krb5-workstation` | Red Hat:enterprise_linux:4::desktop | All versions | 0:1.3.4-62.el4_8.1 | | `krb5` | Red Hat:enterprise_linux:4::es | All versions | 0:1.3.4-62.el4_8.1 | | `krb5-debuginfo` | Red Hat:enterprise_linux:4::es | All versions | 0:1.3.4-62.el4_8.1 | | `krb5-devel` | Red Hat:enterprise_linux:4::es | All versions | 0:1.3.4-62.el4_8.1 | | `krb5-libs` | Red Hat:enterprise_linux:4::es | All versions | 0:1.3.4-62.el4_8.1 | Products: Mit Kerberos, Mit Kerberos 5. ## How do I fix CVE-2009-4212? Upgrade to a fixed version. ## Is CVE-2009-4212 being exploited? There is no known exploitation of CVE-2009-4212 in the wild and no public exploit code. ## Other vulnerabilities in Mit Kerberos 5 - [CVE-2004-0523](https://insights.sbomify.com/CVE-2004-0523/): Memory corruption in n/a (critical 10.0) - [CVE-2010-0283](https://insights.sbomify.com/CVE-2010-0283/): Denial of service in n/a (high 7.8) - [CVE-2018-5709](https://insights.sbomify.com/CVE-2018-5709/): Integer overflow in n/a (high 7.5) - [CVE-2003-0138](https://insights.sbomify.com/CVE-2003-0138/): Auth bypass in n/a (high 7.5) - [CVE-2003-0139](https://insights.sbomify.com/CVE-2003-0139/): Auth bypass in n/a (high 7.5) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2009-4212 and fix it if it is affected. What it is: CVE-2009-4212 is a critical vulnerability in Mit Kerberos 5, published on 13 Jan 2010. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2009-4212 in the wild and no public exploit code. 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-2009-4212/ (Markdown: https://insights.sbomify.com/CVE-2009-4212/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2009-4212 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-4212 - OSV: https://osv.dev/vulnerability/CVE-2009-4212 --- From sbomify Insights: https://insights.sbomify.com/CVE-2009-4212/ Summaries are generated and may contain mistakes; the official description above is the record.