CVE-2015-8803

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.

Score

CVSS 3.0 9.8 Critical

Status

Modified - cve@mitre.org

Published

2016-02-23

Last modified

2024-08-06

Weaknesses

CWE-254, CWE-310

Affected products

• Ubuntu Linux (Canonical)
• Nettle (Nettle Project)
• Leap (Opensuse)
• Opensuse (Opensuse)

References

• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/176807.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177229.html
• http://lists.fedoraproject.org/pipermail/package-announce/2016-February/177473.html
• 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-multiplications-in-Nettle.html
• https://git.lysator.liu.se/nettle/nettle/commit/c71d2c9d20eeebb985e3872e4550137209e3ce4d
• https://lists.gnu.org/archive/html/info-gnu/2016-01/msg00006.html
• https://lists.lysator.liu.se/pipermail/nettle-bugs/2015/003028.html