# CVE-2015-1789: Denial of service in n/a

> Remote attackers can cause a denial of service via crafted ASN1_TIME data in OpenSSL, requiring specific client authentication configurations.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 12 Jun 2015
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2015-1789, GHSA-q289-c6qx-8gxc, UBUNTU-CVE-2015-1789

## What is CVE-2015-1789?

CVE-2015-1789 is a high-severity denial of service vulnerability in Openssl Openssl, published on 12 Jun 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The X509_cmp_time function in crypto/x509/x509_vfy.c in OpenSSL before 0.9.8zg, 1.0.0 before 1.0.0s, 1.0.1 before 1.0.1n, and 1.0.2 before 1.0.2b allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via a crafted length field in ASN1_TIME data, as demonstrated by an attack against a server that supports client authentication with a custom verification callback.

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

## Which versions are affected by CVE-2015-1789?

It affects 2 products.


Products: Openssl Openssl, Oracle Sparc-Opl Service Processor.

## How do I fix CVE-2015-1789?

Upgrade to a fixed version.

## Is CVE-2015-1789 being exploited?

There is no known exploitation of CVE-2015-1789 in the wild and no public exploit code.

## Other vulnerabilities in Openssl Openssl

- [CVE-2009-3245](https://insights.sbomify.com/CVE-2009-3245/): Null dereference in n/a (critical 10.0)
- [CVE-2006-3738](https://insights.sbomify.com/CVE-2006-3738/): Memory corruption in n/a (critical 10.0)
- [CVE-2026-63073](https://insights.sbomify.com/CVE-2026-63073/): Untrusted Sender DN Used as Format String in CMP Response Validation (critical 9.8)
- [CVE-2016-6309](https://insights.sbomify.com/CVE-2016-6309/): Use after free in n/a (critical 9.8)
- [CVE-2016-0799](https://insights.sbomify.com/CVE-2016-0799/): Integer overflow in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-1789 and fix it if it is affected.

What it is: CVE-2015-1789 is a high-severity denial of service vulnerability in Openssl Openssl, published on 12 Jun 2015. 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-2015-1789 in the wild and no public exploit code.

Affected product: Openssl Openssl. 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-2015-1789/ (Markdown: https://insights.sbomify.com/CVE-2015-1789/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-1789
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-1789
- OSV: https://osv.dev/vulnerability/CVE-2015-1789

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From sbomify Insights: https://insights.sbomify.com/CVE-2015-1789/
Summaries are generated and may contain mistakes; the official description above is the record.