CVE catalog

CVE-2020-10932

mbedtls: CVE-2020-10932

Severity: Medium · CVSS 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Published: Apr 15, 2020, 2:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.25% · Oct 25, 2026

An issue was discovered in Arm Mbed TLS before 2.16.6 and 2.7.x before 2.7.15. An attacker that can get precise enough side-channel measurements can recover the long-term ECDSA private key by (1) reconstructing the projective coordinate of the result of scalar multiplication by exploiting side channels in the conversion to affine coordinates; (2) using an attack described by Naccache, Smart, and Stern in 2003 to recover a few bits of the ephemeral scalar from those projective coordinates via several measurements; and (3) using a lattice attack to get from there to the long-term ECDSA private key used for the signatures. Typically an attacker would have sufficient access when attacking an SGX enclave and controlling the untrusted OS.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	mbedtls	sid	`3.6.7-3`	fixed
Debian	mbedtls	forky	`3.6.7-3`	fixed
Debian	mbedtls	trixie	`3.6.6-0.1~deb13u1`	fixed
Debian	mbedtls	bookworm	`2.28.3-1`	fixed
Alpine	mbedtls	3.10	`2.16.6-r0`	fixed
Alpine	mbedtls	3.11	`2.16.6-r0`	fixed
Alpine	mbedtls	3.12	`2.16.6-r0`	fixed
Alpine	mbedtls	3.13	`2.16.6-r0`	fixed
Alpine	mbedtls	3.14	`2.16.6-r0`	fixed
Alpine	mbedtls	3.15	`2.16.6-r0`	fixed
Alpine	mbedtls	3.16	`2.16.6-r0`	fixed
Alpine	mbedtls	3.17	`2.16.6-r0`	fixed
Alpine	mbedtls	3.18	`2.16.6-r0`	fixed
Alpine	mbedtls	3.19	`2.16.6-r0`	fixed
Alpine	mbedtls	3.20	`2.16.6-r0`	fixed
Alpine	mbedtls	3.21	`2.16.6-r0`	fixed
Alpine	mbedtls	3.22	`2.16.6-r0`	fixed
Alpine	mbedtls	3.23	`2.16.6-r0`	fixed
Alpine	mbedtls	3.24	`2.16.6-r0`	fixed
Ubuntu	mbedtls	16.04	`2.1.2-1`	vulnerable
Ubuntu	mbedtls	16.04	`2.2.0-1`	vulnerable
Ubuntu	mbedtls	16.04	`2.2.1-1`	vulnerable
Ubuntu	mbedtls	16.04	`2.2.1-2`	vulnerable
Ubuntu	mbedtls	16.04	`2.2.1-2ubuntu0.1`	vulnerable
Ubuntu	mbedtls	16.04	`2.2.1-2ubuntu0.2`	vulnerable
Ubuntu	mbedtls	16.04	`2.2.1-2ubuntu0.3`	vulnerable
Ubuntu	mbedtls	pro	`2.16.2-1`	vulnerable
Ubuntu	mbedtls	pro	`2.16.3-1`	vulnerable
Ubuntu	mbedtls	pro	`2.16.4-1ubuntu2`	vulnerable
Ubuntu	mbedtls	pro	`2.16.4-1ubuntu2+esm1`	vulnerable
Suse	mbedtls	package hub 15 sp2	`2.16.9-bp152.2.3.1`	fixed
Opensuse	mbedtls	leap 15.2	`2.16.9-lp152.2.3.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	mbedtls	source	sid	`2.16.9-0.1`	not yet assigned	Not reported	[963159]
Debian	mbedtls	source	forky	`2.16.9-0.1`	not yet assigned	Not reported	[963159]
Debian	mbedtls	source	trixie	`2.16.9-0.1`	not yet assigned	Not reported	[963159]
Debian	mbedtls	source	bookworm	`2.16.9-0.1`	not yet assigned	Not reported	[963159]
Alpine	mbedtls	apk	3.10	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.11	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.12	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.13	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.14	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.15	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.16	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.17	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.18	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.19	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.20	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.21	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.22	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.23	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Alpine	mbedtls	apk	3.24	`2.16.6-r0`	Not reported	ALPINE-CVE-2020-10932	Not reported
Suse	mbedtls	rpm	package hub 15 sp2	`2.16.9-bp152.2.3.1`	Not reported	OPENSUSE-SU-2021:0397-1	Not reported
Opensuse	mbedtls	rpm	leap 15.2	`2.16.9-lp152.2.3.1`	Not reported	OPENSUSE-SU-2021:0384-1	Not reported

[Debian bug #963159]

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libmbedcrypto7]Fixed
Source package: [mbedtls]
Details (2)
- 2.28.3-1 · amd64 · bookworm
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · bookworm; dsa · mbedtls · debian · 12
- 2.28.3-1 · arm64 · bookworm
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · bookworm; dsa · mbedtls · debian · 12
[libmbedtls14]Fixed
Source package: [mbedtls]
Details (2)
- 2.28.3-1 · amd64 · bookworm
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · bookworm; dsa · mbedtls · debian · 12
- 2.28.3-1 · arm64 · bookworm
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · bookworm; dsa · mbedtls · debian · 12
[libmbedtls-dev]Fixed
Source package: [mbedtls]
Details (2)
- 2.28.3-1 · amd64 · bookworm
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · bookworm; dsa · mbedtls · debian · 12
- 2.28.3-1 · arm64 · bookworm
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · bookworm; dsa · mbedtls · debian · 12
[libmbedtls-doc]Fixed
Source package: [mbedtls]
Details (2)
- 2.28.3-1 · all · bookworm
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · bookworm; dsa · mbedtls · debian · 12
- 2.28.3-1 · all · bookworm
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · bookworm; dsa · mbedtls · debian · 12
[libmbedx509-1]Fixed
Source package: [mbedtls]
Details (2)
- 2.28.3-1 · amd64 · bookworm
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · bookworm; dsa · mbedtls · debian · 12
- 2.28.3-1 · arm64 · bookworm
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · bookworm; dsa · mbedtls · debian · 12

[Debian 13 (Trixie)]

[libmbedcrypto16]Fixed
Source package: [mbedtls]
Details (2)
- 3.6.5-0.1~deb13u1 · amd64 · trixie
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · 13
- 3.6.5-0.1~deb13u1 · arm64 · trixie
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · 13
[libmbedtls21]Fixed
Source package: [mbedtls]
Details (2)
- 3.6.5-0.1~deb13u1 · amd64 · trixie
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · 13
- 3.6.5-0.1~deb13u1 · arm64 · trixie
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · 13
[libmbedtls-dev]Fixed
Source package: [mbedtls]
Details (2)
- 3.6.5-0.1~deb13u1 · amd64 · trixie
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · 13
- 3.6.5-0.1~deb13u1 · arm64 · trixie
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · 13
[libmbedtls-doc]Fixed
Source package: [mbedtls]
Details (2)
- 3.6.5-0.1~deb13u1 · all · trixie
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · 13
- 3.6.5-0.1~deb13u1 · all · trixie
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · 13
[libmbedx509-7]Fixed
Source package: [mbedtls]
Details (2)
- 3.6.5-0.1~deb13u1 · amd64 · trixie
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · 13
- 3.6.5-0.1~deb13u1 · arm64 · trixie
  Fixed · Fixed: 2.16.9-0.1
  dsa · mbedtls · debian · 13

Observed: Oct 23, 2026, 5:46:37 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]