# CVE-2015-3798: Memory corruption in n/a

> Attackers can execute arbitrary code or cause denial of service via crafted regular expressions in Apple iOS and OS X.

- **Severity:** High 7.5 (`AV:N/AC:L/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:** No
- **Published:** 16 Aug 2015
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-r4xv-4m8v-9gfg

## What is CVE-2015-3798?

CVE-2015-3798 is a high-severity memory corruption vulnerability in Apple Iphone Os, published on 16 Aug 2015. 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 TRE library in Libc in Apple iOS before 8.4.1 and OS X before 10.10.5 allows context-dependent attackers to execute arbitrary code or cause a denial of service (memory corruption and application crash) via a crafted regular expression, a different vulnerability than CVE-2015-3796 and CVE-2015-3797.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2015-3798?

It affects 2 products.


Products: Apple Iphone Os, Apple Mac Os X.

## How do I fix CVE-2015-3798?

No fix has been published for CVE-2015-3798 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-3798 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2015-3798 exists.

Public exploit code:

- Apple Mac OSX Regex Engine (TRE) - Integer Signedness / Overflow (exploitdb)

## 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-2015-3798 and fix it if it is affected.

What it is: CVE-2015-3798 is a high-severity memory corruption vulnerability in Apple Iphone Os, published on 16 Aug 2015. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2015-3798 exists.

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-2015-3798/ (Markdown: https://insights.sbomify.com/CVE-2015-3798/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-3798
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-3798
- OSV: https://osv.dev/vulnerability/CVE-2015-3798

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From sbomify Insights: https://insights.sbomify.com/CVE-2015-3798/
Summaries are generated and may contain mistakes; the official description above is the record.