CVE-2017-8932
CVE-2017-8932 is a medium-severity vulnerability in Golang Go with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-682.
Key facts
- Severity: Medium (CVSS 3.x base score 5.9)
- CVSS v2: 4.3
- EPSS exploit prediction: 2% (81st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-682
- Affected product: Golang Go
- Published:
- Last modified:
Description
A bug in the standard library ScalarMult implementation of curve P-256 for amd64 architectures in Go before 1.7.6 and 1.8.x before 1.8.2 causes incorrect results to be generated for specific input points. An adaptive attack can be mounted to progressively extract the scalar input to ScalarMult by submitting crafted points and observing failures to the derive correct output. This leads to a full key recovery attack against static ECDH, as used in popular JWT libraries.
Frequently asked questions
- What is CVE-2017-8932?
- A bug in the standard library ScalarMult implementation of curve P-256 for amd64 architectures in Go before 1.7.6 and 1.8.x before 1.8.2 causes incorrect results to be generated for specific input points. An adaptive attack can be mounted to progressively extract the scalar input to ScalarMult by submitting crafted points and observing failures to the derive correct output. This leads to a full key recovery attack against static ECDH, as used in popular JWT libraries.
- How severe is CVE-2017-8932?
- CVE-2017-8932 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2017-8932 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2017-8932?
- CVE-2017-8932 primarily affects Golang Go. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2017-8932?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2017-8932 published?
- CVE-2017-8932 was published on 2017-07-06 and last updated on 2026-06-17.
References
- http://lists.opensuse.org/opensuse-updates/2017-06/msg00079.html
- http://lists.opensuse.org/opensuse-updates/2017-06/msg00080.html
- https://access.redhat.com/errata/RHSA-2017:1859
- https://bugzilla.redhat.com/show_bug.cgi?id=1455191
- https://github.com/golang/go/commit/9294fa2749ffee7edbbb817a0ef9fe633136fa9c
- https://github.com/golang/go/issues/20040
- https://go-review.googlesource.com/c/41070/
- https://groups.google.com/d/msg/golang-announce/B5ww0iFt1_Q/TgUFJV14BgAJ
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LZH4T47ROLZ6YEZBDVXVS2KISTDMXAPS/
Affected products (6)
- cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
- cpe:2.3:a:golang:go:1.8:*:*:*:*:*:*:*
- cpe:2.3:a:golang:go:1.8.1:*:*:*:*:*:*:*
- cpe:2.3:a:novell:suse_package_hub_for_suse_linux_enterprise:12:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:42.2:*:*:*:*:*:*:*
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