CVE-2015-8805
Published: 31 December 2015
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.
Notes
Author | Note |
---|---|
mdeslaur | same patch as CVE-2015-8803 |
Priority
Status
Package | Release | Status |
---|---|---|
nettle Launchpad, Ubuntu, Debian |
precise |
Not vulnerable
(code not present)
|
trusty |
Released
(2.7.1-1ubuntu0.1)
|
|
upstream |
Released
(3.2)
|
|
vivid |
Ignored
(end of life)
|
|
wily |
Released
(3.1.1-4ubuntu0.1)
|
|
xenial |
Not vulnerable
(3.2-1)
|
|
yakkety |
Not vulnerable
(3.2-1)
|
|
zesty |
Not vulnerable
(3.2-1)
|
|
Patches: upstream: https://git.lysator.liu.se/nettle/nettle/commit/c71d2c9d20eeebb985e3872e4550137209e3ce4d |
Severity score breakdown
Parameter | Value |
---|---|
Base score | 9.8 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | High |
Integrity impact | High |
Availability impact | High |
Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
References
- http://seclists.org/oss-sec/2016/q1/273
- https://blog.fuzzing-project.org/38-Miscomputations-of-elliptic-curve-scalar-multiplications-in-Nettle.html
- https://lists.gnu.org/archive/html/info-gnu/2016-01/msg00006.html
- https://ubuntu.com/security/notices/USN-2897-1
- https://www.cve.org/CVERecord?id=CVE-2015-8805
- NVD
- Launchpad
- Debian