CVE-2023-3817
Published: 31 July 2023
Issue summary: Checking excessively long DH keys or parameters may be very slow. Impact summary: Applications that use the functions DH_check(), DH_check_ex() or EVP_PKEY_param_check() to check a DH key or DH parameters may experience long delays. Where the key or parameters that are being checked have been obtained from an untrusted source this may lead to a Denial of Service. The function DH_check() performs various checks on DH parameters. After fixing CVE-2023-3446 it was discovered that a large q parameter value can also trigger an overly long computation during some of these checks. A correct q value, if present, cannot be larger than the modulus p parameter, thus it is unnecessary to perform these checks if q is larger than p. An application that calls DH_check() and supplies a key or parameters obtained from an untrusted source could be vulnerable to a Denial of Service attack. The function DH_check() is itself called by a number of other OpenSSL functions. An application calling any of those other functions may similarly be affected. The other functions affected by this are DH_check_ex() and EVP_PKEY_param_check(). Also vulnerable are the OpenSSL dhparam and pkeyparam command line applications when using the "-check" option. The OpenSSL SSL/TLS implementation is not affected by this issue. The OpenSSL 3.0 and 3.1 FIPS providers are not affected by this issue.
Notes
Author | Note |
---|---|
Priority reason: Upstream rates this as having low severity |
Priority
Status
Package | Release | Status |
---|---|---|
edk2
Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
focal |
Needed
|
|
jammy |
Needed
|
|
lunar |
Ignored
(end of life, was needs-triage)
|
|
mantic |
Ignored
(end of life, was needed)
|
|
noble |
Needed
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Needs triage
|
|
xenial |
Needs triage
|
|
nodejs
Launchpad, Ubuntu, Debian |
bionic |
Needs triage
|
focal |
Not vulnerable
(uses system openssl)
|
|
jammy |
Needed
|
|
lunar |
Not vulnerable
(uses system openssl)
|
|
mantic |
Not vulnerable
(uses system openssl)
|
|
noble |
Not vulnerable
(uses system openssl)
|
|
trusty |
Not vulnerable
(uses system openssl)
|
|
upstream |
Needs triage
|
|
xenial |
Needs triage
|
|
openssl
Launchpad, Ubuntu, Debian |
bionic |
Released
(1.1.1-1ubuntu2.1~18.04.23+esm3)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
focal |
Released
(1.1.1f-1ubuntu2.20)
|
|
jammy |
Released
(3.0.2-0ubuntu1.12)
|
|
lunar |
Released
(3.0.8-1ubuntu1.4)
|
|
mantic |
Not vulnerable
(3.0.10-1ubuntu2)
|
|
noble |
Not vulnerable
(3.0.10-1ubuntu2)
|
|
trusty |
Needs triage
|
|
upstream |
Released
(3.0.10)
|
|
xenial |
Released
(1.0.2g-1ubuntu4.20+esm10)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
|
openssl1.0
Launchpad, Ubuntu, Debian |
bionic |
Released
(1.0.2n-1ubuntu5.13+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
focal |
Does not exist
|
|
jammy |
Does not exist
|
|
lunar |
Does not exist
|
|
mantic |
Does not exist
|
|
noble |
Does not exist
|
|
trusty |
Does not exist
|
|
upstream |
Needed
|
|
xenial |
Does not exist
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 5.3 |
Attack vector | Network |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | Low |
Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L |
References
- https://www.openssl.org/news/secadv/20230731.txt
- https://ubuntu.com/security/notices/USN-6435-1
- https://ubuntu.com/security/notices/USN-6450-1
- https://ubuntu.com/security/notices/USN-6435-2
- https://ubuntu.com/security/notices/USN-6709-1
- https://www.cve.org/CVERecord?id=CVE-2023-3817
- NVD
- Launchpad
- Debian