---
title: "CVE-2015-2141\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2015-2141?format=md
keywords: index, follow
---

# CVE-2015-2141

Publication date 1 July 2015

Last updated 24 July 2024

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

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## Description

The InvertibleRWFunction::CalculateInverse function in rw.cpp in libcrypt++
5.6.2 does not properly blind private key operations for the Rabin-Williams
digital signature algorithm, which allows remote attackers to obtain
private keys via a timing attack.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| libcrypto++ | 17.04 zesty | Not affected |
| 16.10 yakkety | Not affected |
| 16.04 LTS xenial | Not affected |
| 15.10 wily | Not affected |
| 15.04 vivid | Fixed 5.6.1-6+deb8u1build0.15.04.1 |
| 14.10 utopic | Fixed 5.6.1-6+deb8u1build0.14.10.1 |
| 14.04 LTS trusty | Fixed 5.6.1-6+deb8u1build0.14.04.1 |
| 12.04 LTS precise | Ignored end of life |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2015-2141?format=md#patch-details)

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| libcrypto++ | * Upstream:   [9425e16](https://github.com/weidai11/cryptopp/commit/9425e16437439e68c7d96abef922167d68fafaff) |

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2141)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2015-2141)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2015-2141)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2015-2141)

### Other references

* <https://github.com/weidai11/cryptopp/commit/9425e16437439e68c7d96abef922167d68fafaff>
* <https://eprint.iacr.org/2015/368>
* <https://www.cve.org/CVERecord?id=CVE-2015-2141>