# CVE-2023-0361: Information disclosure in gnutls

> A timing side-channel in GnuTLS allows attackers to recover RSA keys and decrypt application data via Bleichenbacher-style attacks.

- **Severity:** High 7.4 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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:** 15 Feb 2023
- **Updated:** 14 Oct 2026
- **Also known as:** ALPINE-CVE-2023-0361, ALSA-2023:1141, ALSA-2023:1569, AZL-13568, CLSA-2023-1692294262, CLSA-2023-1692295113, DEBIAN-CVE-2023-0361, DLA-3321-1, DSA-5349-1, GHSA-5547-g9w2-52xj, MGASA-2023-0067, OESA-2023-1126, RHSA-2023:1141, RHSA-2023:1200, RHSA-2023:1569, RHSA-2023:3361, RLSA-2023:1141, RLSA-2023:1569, SUSE-SU-2023:0475-1, SUSE-SU-2023:0610-1, UBUNTU-CVE-2023-0361, USN-5901-1, openSUSE-SU-2024:12699-1

## What is CVE-2023-0361?

CVE-2023-0361 is a high-severity vulnerability in Debian Debian Linux, published on 15 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A timing side-channel in the handling of RSA ClientKeyExchange messages was discovered in GnuTLS. This side-channel can be sufficient to recover the key encrypted in the RSA ciphertext across a network in a Bleichenbacher style attack. To achieve a successful decryption the attacker would need to send a large amount of specially crafted messages to the vulnerable server. By recovering the secret from the ClientKeyExchange message, the attacker would be able to decrypt the application data exchanged over that connection.

Weakness: CWE-203 (Observable Discrepancy)

## Which versions are affected by CVE-2023-0361?

It affects 7 products.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `gnutls` | AlmaLinux:8 | All versions | 3.6.16-6.el8_7 |
| `gnutls-c++` | AlmaLinux:8 | All versions | 3.6.16-6.el8_7 |
| `gnutls-dane` | AlmaLinux:8 | All versions | 3.6.16-6.el8_7 |
| `gnutls-devel` | AlmaLinux:8 | All versions | 3.6.16-6.el8_7 |
| `gnutls-utils` | AlmaLinux:8 | All versions | 3.6.16-6.el8_7 |
| `gnutls` | AlmaLinux:9 | All versions | 3.7.6-18.el9_1 |
| `gnutls-c++` | AlmaLinux:9 | All versions | 3.7.6-18.el9_1 |
| `gnutls-dane` | AlmaLinux:9 | All versions | 3.7.6-18.el9_1 |
| `gnutls-devel` | AlmaLinux:9 | All versions | 3.7.6-18.el9_1 |
| `gnutls-utils` | AlmaLinux:9 | All versions | 3.7.6-18.el9_1 |
| `gnutls-c++` | Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-c++-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-dane` | Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-dane-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-debugsource` | Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-devel` | Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-utils` | Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-utils-debuginfo` | Red Hat:enterprise_linux:8::appstream | All versions | 0:3.6.16-6.el8_7 |
| `gnutls` | Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-c++-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-dane-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-debugsource` | Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-utils-debuginfo` | Red Hat:enterprise_linux:8::baseos | All versions | 0:3.6.16-6.el8_7 |
| `gnutls-c++` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.7.6-18.el9_1 |
| `gnutls-c++-debuginfo` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.7.6-18.el9_1 |
| `gnutls-dane` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.7.6-18.el9_1 |
| `gnutls-dane-debuginfo` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.7.6-18.el9_1 |
| `gnutls-debuginfo` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.7.6-18.el9_1 |
| `gnutls-debugsource` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.7.6-18.el9_1 |
| `gnutls-devel` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.7.6-18.el9_1 |
| `gnutls-utils` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.7.6-18.el9_1 |
| `gnutls-utils-debuginfo` | Red Hat:enterprise_linux:9::appstream | All versions | 0:3.7.6-18.el9_1 |
| `gnutls` | Red Hat:enterprise_linux:9::baseos | All versions | 0:3.7.6-18.el9_1 |
| `gnutls-c++-debuginfo` | Red Hat:enterprise_linux:9::baseos | All versions | 0:3.7.6-18.el9_1 |
| `gnutls-dane-debuginfo` | Red Hat:enterprise_linux:9::baseos | All versions | 0:3.7.6-18.el9_1 |
| `gnutls-debuginfo` | Red Hat:enterprise_linux:9::baseos | All versions | 0:3.7.6-18.el9_1 |
| `gnutls-debugsource` | Red Hat:enterprise_linux:9::baseos | All versions | 0:3.7.6-18.el9_1 |
| `gnutls-utils-debuginfo` | Red Hat:enterprise_linux:9::baseos | All versions | 0:3.7.6-18.el9_1 |

Products: Debian Debian Linux, Fedoraproject Fedora, Gnu Gnutls, Netapp Active Iq Unified Manager, Netapp Converged Systems Advisor Agent, Netapp Ontap Select Deploy Administration Utility, Redhat Enterprise Linux.

## How do I fix CVE-2023-0361?

Upgrade to a fixed version.

## Is CVE-2023-0361 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0361 exists.

## Other vulnerabilities in Debian Debian Linux

- [CVE-2015-3306](https://insights.sbomify.com/CVE-2015-3306/): ProFTPD Improper Access Control (critical 10.0, exploited in the wild)
- [CVE-2025-49113](https://insights.sbomify.com/CVE-2025-49113/): RoundCube Webmail Deserialization of Untrusted Data (critical 9.9, exploited in the wild)
- [CVE-2026-24061](https://insights.sbomify.com/CVE-2026-24061/): GNU InetUtils Argument Injection (critical 9.8, exploited in the wild)
- [CVE-2025-39682](https://insights.sbomify.com/CVE-2025-39682/): Linux Kernel Improper Check for Unusual or Exceptional Conditions (critical 9.8, exploited in the wild)
- [CVE-2024-9680](https://insights.sbomify.com/CVE-2024-9680/): Mozilla Firefox Use-After-Free (critical 9.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-0361 and fix it if it is affected.

What it is: CVE-2023-0361 is a high-severity vulnerability in Debian Debian Linux, published on 15 Feb 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-0361 exists.

Affected product: Debian Debian 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-2023-0361/ (Markdown: https://insights.sbomify.com/CVE-2023-0361/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-0361
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-0361
- OSV: https://osv.dev/vulnerability/CVE-2023-0361

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-0361/
Summaries are generated and may contain mistakes; the official description above is the record.