CVE-2015-8805

Description

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.

References

https://git.lysator.liu.se/nettle/nettle/commit/c71d2c9d20eeebb985e3872e4550137209e3ce4d

https://blog.fuzzing-project.org/38-Miscomputations-of-elliptic-curve-scalar-multiplications-in-Nettle.html

http://www.ubuntu.com/usn/USN-2897-1

http://www.securityfocus.com/bid/84272

http://www.openwall.com/lists/oss-security/2016/02/03/1

http://www.openwall.com/lists/oss-security/2016/02/02/2

http://rhn.redhat.com/errata/RHSA-2016-2582.html

http://lists.opensuse.org/opensuse-updates/2016-02/msg00100.html

http://lists.opensuse.org/opensuse-updates/2016-02/msg00093.html

http://lists.opensuse.org/opensuse-updates/2016-02/msg00091.html

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3