CVE-2021-3580
Published: 10 June 2021
A flaw was found in the way nettle's RSA decryption functions handled specially crafted ciphertext. An attacker could use this flaw to provide a manipulated ciphertext leading to application crash and denial of service.
Notes
| Author | Note |
|---|---|
| mdeslaur | this fix relies on the RSA refactoring that is required to fix CVE-2018-16869, which is too intrusive to backport to older releases |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
nettle Launchpad, Ubuntu, Debian |
bionic |
Released
(3.4.1-0ubuntu0.18.04.1)
|
| focal |
Released
(3.5.1+really3.5.1-2ubuntu0.2)
|
|
| groovy |
Released
(3.6-2ubuntu0.2)
|
|
| hirsute |
Released
(3.7-2.1ubuntu1.1)
|
|
| impish |
Not vulnerable
(3.7.3-1)
|
|
| jammy |
Not vulnerable
(3.7.3-1)
|
|
| kinetic |
Not vulnerable
(3.7.3-1)
|
|
| trusty |
Ignored
(change too intrusive)
|
|
| upstream |
Released
(3.7.3-1)
|
|
| xenial |
Ignored
(change too intrusive)
|
|
|
Patches: upstream: https://git.lysator.liu.se/nettle/nettle/-/commit/485b5e2820a057e873b1ba812fdb39cae4adf98c upstream: https://git.lysator.liu.se/nettle/nettle/-/commit/0ad0b5df315665250dfdaa4a1e087f4799edaefe |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |