CVE-2015-8805
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 2.79% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 86.3% of scored records. A rank, not a probability.
- NVD base score
- 9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2016-02-23 19:00Z10 YR AGO
- Last updated
- 2024-08-06 08:29Z2 YR AGO
- Reserved
- 2016-02-02
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- c72893521d89f3f478fa57a1fb9d922655674819b51805981349b8b8ba826515
05 Affected products
06 References
- lists.opensuse.orgopenSUSE-SU-2016:0486http://lists.opensuse.org/opensuse-updates/2016-02/msg00100.html
- blog.fuzzing-project.orghttps://blog.fuzzing-project.org/38-Miscomputations-of-elliptic-curve-scalar-multiplications-in-Nettle.html
- lists.opensuse.orgopenSUSE-SU-2016:0477http://lists.opensuse.org/opensuse-updates/2016-02/msg00093.html
- git.lysator.liu.sehttps://git.lysator.liu.se/nettle/nettle/commit/c71d2c9d20eeebb985e3872e4550137209e3ce4d
- www.ubuntu.comUSN-2897-1http://www.ubuntu.com/usn/USN-2897-1
- lists.opensuse.orgopenSUSE-SU-2016:0475http://lists.opensuse.org/opensuse-updates/2016-02/msg00091.html
- www.openwall.com[oss-security] 20160202 Miscomputations of elliptic curve scalar multiplications in Nettlehttp://www.openwall.com/lists/oss-security/2016/02/02/2
- rhn.redhat.comRHSA-2016:2582http://rhn.redhat.com/errata/RHSA-2016-2582.html
- www.securityfocus.com84272http://www.securityfocus.com/bid/84272
- www.openwall.com[oss-security] 20160202 Re: Miscomputations of elliptic curve scalar multiplications in Nettlehttp://www.openwall.com/lists/oss-security/2016/02/03/1
07 Fixed in
Debian 12
- nettle Fixed in 3.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- nettle Fixed in 3.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- nettle Fixed in 3.2-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 14.04 LTS
- nettle Fixed in 2.7.1-1ubuntu0.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.