CVE-2020-10932
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
9cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
- Arm/Mbed TLSdescription
- osv-coords2 versionspkg:rpm/opensuse/mbedtls&distro=openSUSE%20Leap%2015.2pkg:rpm/suse/mbedtls&distro=SUSE%20Package%20Hub%2015%20SP2
< 2.16.9-lp152.2.3.1+ 1 more
- (no CPE)range: < 2.16.9-lp152.2.3.1
- (no CPE)range: < 2.16.9-bp152.2.3.1
Patches
Vulnerability mechanics
References
6- lists.debian.org/debian-lts-announce/2022/12/msg00036.htmlnvdMailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FCWN5HIF4CJ2LZTOMEBJ7Q4IMMV7ZU2V/nvdMailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNOS2IIBH5WNJXZUV546PY7666DE7Y3L/nvdMailing ListThird Party Advisory
- tls.mbed.org/tech-updates/security-advisoriesnvdVendor Advisory
- tls.mbed.org/tech-updates/security-advisories/mbedtls-security-advisory-2020-04nvdVendor Advisory
- tls.mbed.org/tech-updates/releases/mbedtls-2.16.6-and-2.7.15-releasednvdRelease Notes
News mentions
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