# CVE-2019-1010220: Information disclosure in tcpdump

> A buffer over-read in tcpdump allows attackers to expose stack memory contents by tricking users into opening a malicious pcap file.

- **Severity:** Low 3.3 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N`)
- **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:** 22 Jul 2019
- **Updated:** 5 Aug 2024
- **Also known as:** DEBIAN-CVE-2019-1010220, ECHO-04e2-597a-f713, GHSA-fj2x-3wgg-g9c7, UBUNTU-CVE-2019-1010220

## What is CVE-2019-1010220?

CVE-2019-1010220 is a low-severity vulnerability in Tcpdump Tcpdump, published on 22 Jul 2019. 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

tcpdump.org tcpdump 4.9.2 is affected by: CWE-126: Buffer Over-read. The impact is: May expose Saved Frame Pointer, Return Address etc. on stack. The component is: line 234: "ND_PRINT((ndo, "%s", buf));", in function named "print_prefix", in "print-hncp.c". The attack vector is: The victim must open a specially crafted pcap file.

Weakness: CWE-125 (Out-of-bounds Read), CWE-126 (Buffer Over-read)

## Which versions are affected by CVE-2019-1010220?

It affects 1 product.


Products: Tcpdump Tcpdump.

## How do I fix CVE-2019-1010220?

Upgrade to a fixed version.

## Is CVE-2019-1010220 being exploited?

There is no known exploitation of CVE-2019-1010220 in the wild and no public exploit code.

## Other vulnerabilities in Tcpdump Tcpdump

- [CVE-2018-10103](https://insights.sbomify.com/CVE-2018-10103/): tcpdump before 4.9.3 mishandles the printing of SMB data (issue 1 of 2). (critical 9.8)
- [CVE-2018-10105](https://insights.sbomify.com/CVE-2018-10105/): Denial of service in n/a (critical 9.8)
- [CVE-2017-12893](https://insights.sbomify.com/CVE-2017-12893/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-12894](https://insights.sbomify.com/CVE-2017-12894/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-12895](https://insights.sbomify.com/CVE-2017-12895/): Memory corruption in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-1010220 and fix it if it is affected.

What it is: CVE-2019-1010220 is a low-severity vulnerability in Tcpdump Tcpdump, published on 22 Jul 2019. 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-2019-1010220 in the wild and no public exploit code.

Affected product: Tcpdump Tcpdump. 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-2019-1010220/ (Markdown: https://insights.sbomify.com/CVE-2019-1010220/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-1010220
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-1010220
- OSV: https://osv.dev/vulnerability/CVE-2019-1010220

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-1010220/
Summaries are generated and may contain mistakes; the official description above is the record.