# CVE-2015-2774: Weak cryptography in n/a

> Man-in-the-middle attackers can decrypt TLS traffic via a padding oracle attack due to improper CBC padding checks in Erlang/OTP.

- **Severity:** Medium 5.9 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 7 Apr 2016
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2015-2774, GHSA-x7g5-r7mw-4gvx, MGASA-2015-0192, UBUNTU-CVE-2015-2774

## What is CVE-2015-2774?

CVE-2015-2774 is a medium-severity vulnerability in Opensuse Opensuse, published on 7 Apr 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Erlang/OTP before 18.0-rc1 does not properly check CBC padding bytes when terminating connections, which makes it easier for man-in-the-middle attackers to obtain cleartext data via a padding-oracle attack, a variant of CVE-2014-3566 (aka POODLE).

Weakness: CWE-200 (Exposure of Sensitive Information to an Unauthorized Actor)

## Which versions are affected by CVE-2015-2774?

It affects 3 products.


Products: Erlang Erlang\/Otp, Opensuse Opensuse, Oracle Solaris.

## How do I fix CVE-2015-2774?

Upgrade to a fixed version.

## Is CVE-2015-2774 being exploited?

There is no known exploitation of CVE-2015-2774 in the wild and no public exploit code.

## Other vulnerabilities in Opensuse Opensuse

- [CVE-2022-37026](https://insights.sbomify.com/CVE-2022-37026/): Auth bypass in n/a (critical 9.8)
- [CVE-2016-10253](https://insights.sbomify.com/CVE-2016-10253/): Memory corruption in n/a (critical 9.8)
- [CVE-2026-55953](https://insights.sbomify.com/CVE-2026-55953/): TLS 1.2 and DTLS client accepts unoffered anonymous cipher suite, bypassing server authentication (critical 9.1)
- [CVE-2026-49759](https://insights.sbomify.com/CVE-2026-49759/): Stack buffer overflow in SCTP error cause parsing in inet_drv allows remote VM crash (high 8.8)
- [CVE-2026-58227](https://insights.sbomify.com/CVE-2026-58227/): TLS/DTLS denial of service via unbounded recursion on cross-signed peer certificate chain (high 8.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-2774 and fix it if it is affected.

What it is: CVE-2015-2774 is a medium-severity vulnerability in Opensuse Opensuse, published on 7 Apr 2016. 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-2015-2774 in the wild and no public exploit code.

Affected product: Opensuse Opensuse. 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-2015-2774/ (Markdown: https://insights.sbomify.com/CVE-2015-2774/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-2774
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-2774
- OSV: https://osv.dev/vulnerability/CVE-2015-2774

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-2774/
Summaries are generated and may contain mistakes; the official description above is the record.