CVE-2015-8805
First published: Tue Feb 23 2016(Updated: )
The ecc_256_modq function in ecc-256.c in Nettle before 3.2 does not properly handle carry propagation and produces incorrect output in its implementation of the P-256 NIST elliptic curve, which allows attackers to have unspecified impact via unknown vectors, a different vulnerability than CVE-2015-8803.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Nettle project Nettle | <=3.1.1 | |
| Ubuntu Linux | =14.04 | |
| Ubuntu Linux | =15.10 | |
| openSUSE | =42.1 | |
| openSUSE | =13.1 | |
| openSUSE | =13.2 |
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Reference Links
- http://lists.opensuse.org/opensuse-updates/2016-02/msg00091.html
- http://lists.opensuse.org/opensuse-updates/2016-02/msg00093.html
- http://lists.opensuse.org/opensuse-updates/2016-02/msg00100.html
- http://rhn.redhat.com/errata/RHSA-2016-2582.html
- http://www.openwall.com/lists/oss-security/2016/02/02/2
- http://www.openwall.com/lists/oss-security/2016/02/03/1
- http://www.securityfocus.com/bid/84272
- http://www.ubuntu.com/usn/USN-2897-1
- https://blog.fuzzing-project.org/38-Miscomputations-of-elliptic-curve-scalar-multiplications-in-Nettle.html
- https://git.lysator.liu.se/nettle/nettle/commit/c71d2c9d20eeebb985e3872e4550137209e3ce4d
Frequently Asked Questions
What is the severity of CVE-2015-8805?
CVE-2015-8805 is classified as a medium severity vulnerability due to its potential to cause incorrect outcomes in cryptographic operations.
How do I fix CVE-2015-8805?
To fix CVE-2015-8805, update Nettle to version 3.2 or later where the issue has been resolved.
Which software versions are affected by CVE-2015-8805?
CVE-2015-8805 affects Nettle versions prior to 3.2 and specific versions of Ubuntu and openSUSE as listed.
What types of systems are impacted by CVE-2015-8805?
CVE-2015-8805 can potentially impact systems running Nettle version 3.1.1 or earlier, particularly those using outdated Linux distributions.
What implications does CVE-2015-8805 have for cryptographic security?
CVE-2015-8805 may result in security weaknesses due to erroneous elliptic curve computations, compromising cryptographic integrity.
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- version/opensuse/13.2