# CVE-2009-0040: Use after free in n/a > Attackers can cause crashes or execute code via crafted PNG files exploiting uninitialized pointer frees in libpng. - **Severity:** Medium 6.8 (`AV:N/AC:M/Au:N/C:P/I:P/A:P`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** A user has to click or open something - **Fix available:** Yes - **Published:** 22 Feb 2009 - **Updated:** 7 Aug 2024 - **Also known as:** GHSA-m968-rq7m-646j, RHSA-2009:0340 ## What is CVE-2009-0040? CVE-2009-0040 is a medium-severity use after free vulnerability in Apple Iphone Os, published on 22 Feb 2009. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. ### Official description The PNG reference library (aka libpng) before 1.0.43, and 1.2.x before 1.2.35, as used in pngcrush and other applications, allows context-dependent attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a crafted PNG file that triggers a free of an uninitialized pointer in (1) the png_read_png function, (2) pCAL chunk handling, or (3) setup of 16-bit gamma tables. Weakness: CWE-824 (Access of Uninitialized Pointer) ## Which versions are affected by CVE-2009-0040? It affects 9 products. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `libpng` | Red Hat:enterprise_linux:3::as | All versions | 2:1.2.2-29 | | `libpng-debuginfo` | Red Hat:enterprise_linux:3::as | All versions | 2:1.2.2-29 | | `libpng-devel` | Red Hat:enterprise_linux:3::as | All versions | 2:1.2.2-29 | | `libpng10` | Red Hat:enterprise_linux:3::as | All versions | 0:1.0.13-20 | | `libpng10-debuginfo` | Red Hat:enterprise_linux:3::as | All versions | 0:1.0.13-20 | | `libpng10-devel` | Red Hat:enterprise_linux:3::as | All versions | 0:1.0.13-20 | | `libpng` | Red Hat:enterprise_linux:3::desktop | All versions | 2:1.2.2-29 | | `libpng-debuginfo` | Red Hat:enterprise_linux:3::desktop | All versions | 2:1.2.2-29 | | `libpng-devel` | Red Hat:enterprise_linux:3::desktop | All versions | 2:1.2.2-29 | | `libpng10` | Red Hat:enterprise_linux:3::desktop | All versions | 0:1.0.13-20 | | `libpng10-debuginfo` | Red Hat:enterprise_linux:3::desktop | All versions | 0:1.0.13-20 | | `libpng10-devel` | Red Hat:enterprise_linux:3::desktop | All versions | 0:1.0.13-20 | | `libpng` | Red Hat:enterprise_linux:3::es | All versions | 2:1.2.2-29 | | `libpng-debuginfo` | Red Hat:enterprise_linux:3::es | All versions | 2:1.2.2-29 | | `libpng-devel` | Red Hat:enterprise_linux:3::es | All versions | 2:1.2.2-29 | | `libpng10` | Red Hat:enterprise_linux:3::es | All versions | 0:1.0.13-20 | | `libpng10-debuginfo` | Red Hat:enterprise_linux:3::es | All versions | 0:1.0.13-20 | | `libpng10-devel` | Red Hat:enterprise_linux:3::es | All versions | 0:1.0.13-20 | | `libpng` | Red Hat:enterprise_linux:3::ws | All versions | 2:1.2.2-29 | | `libpng-debuginfo` | Red Hat:enterprise_linux:3::ws | All versions | 2:1.2.2-29 | | `libpng-devel` | Red Hat:enterprise_linux:3::ws | All versions | 2:1.2.2-29 | | `libpng10` | Red Hat:enterprise_linux:3::ws | All versions | 0:1.0.13-20 | | `libpng10-debuginfo` | Red Hat:enterprise_linux:3::ws | All versions | 0:1.0.13-20 | | `libpng10-devel` | Red Hat:enterprise_linux:3::ws | All versions | 0:1.0.13-20 | Products: Apple Iphone Os, Apple Mac Os X, Debian Debian Linux, Fedoraproject Fedora, Libpng Libpng, Opensuse Opensuse, Suse Linux Enterprise, Suse Linux Enterprise Desktop, Suse Linux Enterprise Server. ## How do I fix CVE-2009-0040? Upgrade to a fixed version. ## Is CVE-2009-0040 being exploited? There is no known exploitation of CVE-2009-0040 in the wild and no public exploit code. ## Other vulnerabilities in Apple Iphone Os - [CVE-2021-30666](https://insights.sbomify.com/CVE-2021-30666/): Apple iOS WebKit Buffer Overflow (high 8.8, exploited in the wild) - [CVE-2021-30761](https://insights.sbomify.com/CVE-2021-30761/): Apple iOS WebKit Memory Corruption (high 8.8, exploited in the wild) - [CVE-2021-30762](https://insights.sbomify.com/CVE-2021-30762/): Apple iOS WebKit Use-After-Free (high 8.8, exploited in the wild) - [CVE-2016-4657](https://insights.sbomify.com/CVE-2016-4657/): Apple iOS Webkit Memory Corruption (high 8.8, exploited in the wild) - [CVE-2019-7286](https://insights.sbomify.com/CVE-2019-7286/): Apple Multiple Products Memory Corruption (high 7.8, exploited in the wild) ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2009-0040 and fix it if it is affected. What it is: CVE-2009-0040 is a medium-severity use after free vulnerability in Apple Iphone Os, published on 22 Feb 2009. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link. Exploitation: There is no known exploitation of CVE-2009-0040 in the wild and no public exploit code. Affected product: Apple Iphone Os. 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-2009-0040/ (Markdown: https://insights.sbomify.com/CVE-2009-0040/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2009-0040 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-0040 - OSV: https://osv.dev/vulnerability/CVE-2009-0040 --- From sbomify Insights: https://insights.sbomify.com/CVE-2009-0040/ Summaries are generated and may contain mistakes; the official description above is the record.