# CVE-2018-5345: Memory corruption in n/a

> Attackers can execute arbitrary code or cause a crash via a crafted .cab file due to a stack-based buffer overflow in the GNOME gcab library.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 12 Jan 2018
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2018-5345, DSA-4095-1, GHSA-28gw-xjhw-6cm5, MGASA-2018-0111, RHSA-2018:0350, UBUNTU-CVE-2018-5345, USN-3546-1, openSUSE-SU-2024:10776-1

## What is CVE-2018-5345?

CVE-2018-5345 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 12 Jan 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A stack-based buffer overflow within GNOME gcab through 0.7.4 can be exploited by malicious attackers to cause a crash or, potentially, execute arbitrary code via a crafted .cab file.

Weakness: CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2018-5345?

It affects 10 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `gcab` | Red Hat:enterprise_linux:7::client | All versions | 0:0.7-4.el7_4 |
| `gcab-debuginfo` | Red Hat:enterprise_linux:7::client | All versions | 0:0.7-4.el7_4 |
| `libgcab1` | Red Hat:enterprise_linux:7::client | All versions | 0:0.7-4.el7_4 |
| `libgcab1-devel` | Red Hat:enterprise_linux:7::client | All versions | 0:0.7-4.el7_4 |
| `gcab` | Red Hat:enterprise_linux:7::computenode | All versions | 0:0.7-4.el7_4 |
| `gcab-debuginfo` | Red Hat:enterprise_linux:7::computenode | All versions | 0:0.7-4.el7_4 |
| `libgcab1` | Red Hat:enterprise_linux:7::computenode | All versions | 0:0.7-4.el7_4 |
| `libgcab1-devel` | Red Hat:enterprise_linux:7::computenode | All versions | 0:0.7-4.el7_4 |
| `gcab` | Red Hat:enterprise_linux:7::server | All versions | 0:0.7-4.el7_4 |
| `gcab-debuginfo` | Red Hat:enterprise_linux:7::server | All versions | 0:0.7-4.el7_4 |
| `libgcab1` | Red Hat:enterprise_linux:7::server | All versions | 0:0.7-4.el7_4 |
| `libgcab1-devel` | Red Hat:enterprise_linux:7::server | All versions | 0:0.7-4.el7_4 |
| `gcab` | Red Hat:enterprise_linux:7::workstation | All versions | 0:0.7-4.el7_4 |
| `gcab-debuginfo` | Red Hat:enterprise_linux:7::workstation | All versions | 0:0.7-4.el7_4 |
| `libgcab1` | Red Hat:enterprise_linux:7::workstation | All versions | 0:0.7-4.el7_4 |
| `libgcab1-devel` | Red Hat:enterprise_linux:7::workstation | All versions | 0:0.7-4.el7_4 |
| `gcab` | openSUSE:Tumbleweed | All versions | 1.4-2.9 |

Products: Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora, Gnome Gcab, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus, Redhat Enterprise Linux Server Tus, Redhat Enterprise Linux Workstation.

## How do I fix CVE-2018-5345?

Apply the vendor's patch.

## Is CVE-2018-5345 being exploited?

There is no known exploitation of CVE-2018-5345 in the wild and no public exploit code.

## Other vulnerabilities in Canonical Ubuntu Linux

- [CVE-2020-11651](https://insights.sbomify.com/CVE-2020-11651/): SaltStack Salt Authentication Bypass (critical 9.8, exploited in the wild)
- [CVE-2020-7247](https://insights.sbomify.com/CVE-2020-7247/): OpenSMTPD Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2019-16928](https://insights.sbomify.com/CVE-2019-16928/): Exim Out-of-bounds Write (critical 9.8, exploited in the wild)
- [CVE-2018-6789](https://insights.sbomify.com/CVE-2018-6789/): Exim Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2015-2590](https://insights.sbomify.com/CVE-2015-2590/): Oracle Java SE and Java SE Embedded Remote Code Execution (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-5345 and fix it if it is affected.

What it is: CVE-2018-5345 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 12 Jan 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-5345 in the wild and no public exploit code.

Affected product: Canonical Ubuntu 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-2018-5345/ (Markdown: https://insights.sbomify.com/CVE-2018-5345/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-5345
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-5345
- OSV: https://osv.dev/vulnerability/CVE-2018-5345

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-5345/
Summaries are generated and may contain mistakes; the official description above is the record.