Vulnerability Description
The ecc_256_modp 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-2015-8805.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nettle Project | Nettle | <= 3.1.1 |
| Canonical | Ubuntu Linux | 14.04 |
| Opensuse | Leap | 42.1 |
| Opensuse | Opensuse | 13.1 |
Related Weaknesses (CWE)
References
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176807.h
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177229.h
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177473.h
- 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.ubuntu.com/usn/USN-2897-1
- https://blog.fuzzing-project.org/38-Miscomputations-of-elliptic-curve-scalar-mul
- https://git.lysator.liu.se/nettle/nettle/commit/c71d2c9d20eeebb985e3872e45501372Patch
- https://lists.gnu.org/archive/html/info-gnu/2016-01/msg00006.html
- https://lists.lysator.liu.se/pipermail/nettle-bugs/2015/003028.htmlVendor Advisory
- http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176807.h
FAQ
What is CVE-2015-8803?
CVE-2015-8803 is a vulnerability with a CVSS score of 9.8 (CRITICAL). The ecc_256_modp 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 allow...
How severe is CVE-2015-8803?
CVE-2015-8803 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2015-8803?
Check the references section above for vendor advisories and patch information. Affected products include: Nettle Project Nettle, Canonical Ubuntu Linux, Opensuse Leap, Opensuse Opensuse.