|Summary:||<dev-libs/nettle-3.7.2: out-of-bounds memory access in signature verification (CVE-2021-20305)|
|Product:||Gentoo Security||Reporter:||John Helmert III <ajak>|
|Component:||Vulnerabilities||Assignee:||Gentoo Security <security>|
|Whiteboard:||B3 [glsa+ cve]|
|Package list:||Runtime testing required:||---|
Description John Helmert III 2021-04-06 01:32:10 UTC
CVE-2021-20305: A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability. Please cleanup.
Comment 1 Thomas Deutschmann 2021-05-25 19:57:52 UTC
New GLSA request filed.
Comment 2 Thomas Deutschmann 2021-05-25 19:59:12 UTC
*** Bug 777615 has been marked as a duplicate of this bug. ***