CVE-2023-6237
Published: 15 January 2024
Issue summary: Checking excessively long invalid RSA public keys may take a long time. Impact summary: Applications that use the function EVP_PKEY_public_check() to check RSA public keys may experience long delays. Where the key that is being checked has been obtained from an untrusted source this may lead to a Denial of Service. When function EVP_PKEY_public_check() is called on RSA public keys, a computation is done to confirm that the RSA modulus, n, is composite. For valid RSA keys, n is a product of two or more large primes and this computation completes quickly. However, if n is an overly large prime, then this computation would take a long time. An application that calls EVP_PKEY_public_check() and supplies an RSA key obtained from an untrusted source could be vulnerable to a Denial of Service attack. The function EVP_PKEY_public_check() is not called from other OpenSSL functions however it is called from the OpenSSL pkey command line application. For that reason that application is also vulnerable if used with the '-pubin' and '-check' options on untrusted data. The OpenSSL SSL/TLS implementation is not affected by this issue. The OpenSSL 3.0 and 3.1 FIPS providers are affected by this issue.
Notes
Author | Note |
---|---|
Priority reason: Upstream OpenSSL project has rated this as low severity |
|
mdeslaur | only affects 3.0 and higher |
Priority
Status
Package | Release | Status |
---|---|---|
edk2 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(3.x only)
|
focal |
Not vulnerable
(3.x only)
|
|
jammy |
Not vulnerable
(3.x only)
|
|
lunar |
Not vulnerable
(3.x only)
|
|
mantic |
Not vulnerable
(3.x only)
|
|
noble |
Needed
|
|
trusty |
Ignored
(end of standard support)
|
|
upstream |
Needs triage
|
|
xenial |
Not vulnerable
(3.x only)
|
|
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 |
Not vulnerable
(3.x only)
|
focal |
Not vulnerable
(3.x only)
|
|
jammy |
Released
(3.0.2-0ubuntu1.14)
|
|
lunar |
Ignored
(end of life, was needed)
|
|
mantic |
Released
(3.0.10-1ubuntu2.2)
|
|
noble |
Released
(3.0.10-1ubuntu4)
|
|
trusty |
Not vulnerable
(3.x only)
|
|
upstream |
Released
(3.0.13)
|
|
xenial |
Not vulnerable
(3.x only)
|
|
Patches: upstream: https://git.openssl.org/?p=openssl.git;a=commit;h=18c02492138d1eb8b6548cb26e7b625fb2414a2a |
||
openssl1.0 Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(3.x 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 |
Needs triage
|
|
xenial |
Does not exist
|