CVE-2017-3736
Description
There is a carry propagating bug in the x86_64 Montgomery squaring procedure in OpenSSL before 1.0.2m and 1.1.0 before 1.1.0g. No EC algorithms are affected. Analysis suggests that attacks against RSA and DSA as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH are considered just feasible (although very difficult) because most of the work necessary to deduce information about a private key may be performed offline. The amount of resources required for such an attack would be very significant and likely only accessible to a limited number of attackers. An attacker would additionally need online access to an unpatched system using the target private key in a scenario with persistent DH parameters and a private key that is shared between multiple clients. This only affects processors that support the BMI1, BMI2 and ADX extensions like Intel Broadwell (5th generation) and later or AMD Ryzen.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Arch Fixed 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Fixed | 1:1.1.0.g-1 |
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 1.1.0g-1 |
| sid | Fixed | 1.1.0g-1 |
| forky | Fixed | 1.1.0g-1 |
| bullseye | Fixed | 1.1.0g-1 |
| bookworm | Fixed | 1.1.0g-1 |
Application impact
| Vendor | Product | Versions | Fixed |
|---|---|---|---|
| openssl | openssl | {"startIncluding":"1.0.2","endExcluding":"1.0.2m"} | 1.0.2m |
References
- https://security.archlinux.org/ASA-201711-15
- https://security.archlinux.org/ASA-201711-14
- http://www.oracle.com/technetwork/security-advisory/cpuapr2018-3678067.html
- http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html
- http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- http://www.securityfocus.com/bid/101666
- http://www.securitytracker.com/id/1039727
- https://access.redhat.com/errata/RHSA-2018:0998
- https://access.redhat.com/errata/RHSA-2018:2185
- https://access.redhat.com/errata/RHSA-2018:2186
- https://access.redhat.com/errata/RHSA-2018:2187
- https://access.redhat.com/errata/RHSA-2018:2568
- https://access.redhat.com/errata/RHSA-2018:2575
- https://access.redhat.com/errata/RHSA-2018:2713
- https://github.com/openssl/openssl/commit/4443cf7aa0099e5ce615c18cee249fff77fb0871
- https://security.FreeBSD.org/advisories/FreeBSD-SA-17:11.openssl.asc
- https://security.gentoo.org/glsa/201712-03
- https://security.netapp.com/advisory/ntap-20171107-0002/
- https://security.netapp.com/advisory/ntap-20180117-0002/
- https://support.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbst03881en_us
- https://www.debian.org/security/2017/dsa-4017
- https://www.debian.org/security/2017/dsa-4018
- https://www.openssl.org/news/secadv/20171102.txt
- https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html
CWEs
CWE-200
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.