Описание
Issue summary: Generating excessively long X9.42 DH keys or checking
excessively long X9.42 DH keys or parameters may be very slow.
Impact summary: Applications that use the functions DH_generate_key() to
generate an X9.42 DH key may experience long delays. Likewise, applications
that use DH_check_pub_key(), DH_check_pub_key_ex() or EVP_PKEY_public_check()
to check an X9.42 DH key or X9.42 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.
While DH_check() performs all the necessary checks (as of CVE-2023-3817),
DH_check_pub_key() doesn't make any of these checks, and is therefore
vulnerable for excessively large P and Q parameters.
Likewise, while DH_generate_key() performs a check for an excessively large
P, it doesn't check for an excessively large Q.
An application that calls DH_generate_key() or DH_check_pub_key() and
supplies a key or parameters obtained from an untrusted source could be
vulnerable to a Denial of Service attack.
DH_generate_key() and DH_check_pub_key() are also 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_pub_key_ex(), EVP_PKEY_public_check(), and EVP_PKEY_generate().
Also vulnerable are the OpenSSL pkey command line application when using the
"-pubcheck" option, as well as the OpenSSL genpkey command line application.
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.
A flaw was found in OpenSSL, which caused the generation or checking of long X9.42 DH keys or parameters to be much slower than expected. This issue could lead to a denial of service.
Отчет
This vulnerability in OpenSSL is categorized as a low severity issue primarily because it requires specific conditions to exploit and doesn't directly result in a full Denial of Service (DoS). While the excessive time spent in DH key generation or verification could potentially cause delays, the impact is mitigated by the fact that it requires untrusted sources supplying large Q parameter values. Additionally, the OpenSSL SSL/TLS implementation remains unaffected, limiting the scope of potential attacks. Moreover, there are inherent limits on key length, which further restrict the potential for exploitation.
Меры по смягчению последствий
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Затронутые пакеты
| Платформа | Пакет | Состояние | Рекомендация | Релиз |
|---|---|---|---|---|
| Cryostat 2 | openssl | Not affected | ||
| Red Hat Enterprise Linux 6 | openssl | Out of support scope | ||
| Red Hat Enterprise Linux 7 | openssl | Fix deferred | ||
| Red Hat Enterprise Linux 8 | compat-openssl10 | Fix deferred | ||
| Red Hat Enterprise Linux 9 | compat-openssl11 | Fix deferred | ||
| JBoss Core Services for RHEL 8 | jbcs-httpd24-openssl | Fixed | RHSA-2024:1316 | 18.03.2024 |
| JBoss Core Services on RHEL 7 | jbcs-httpd24-openssl | Fixed | RHSA-2024:1316 | 18.03.2024 |
| JWS 5.7.8 | openssl | Fixed | RHSA-2024:1319 | 18.03.2024 |
| JWS 6.0.1 | openssl | Fixed | RHSA-2024:1325 | 18.03.2024 |
| Red Hat Enterprise Linux 8 | openssl | Fixed | RHSA-2023:7877 | 19.12.2023 |
Показывать по
Ссылки на источники
Дополнительная информация
Статус:
EPSS
5.3 Medium
CVSS3
Связанные уязвимости
Issue summary: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow. Impact summary: Applications that use the functions DH_generate_key() to generate an X9.42 DH key may experience long delays. Likewise, applications that use DH_check_pub_key(), DH_check_pub_key_ex() or EVP_PKEY_public_check() to check an X9.42 DH key or X9.42 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. While DH_check() performs all the necessary checks (as of CVE-2023-3817), DH_check_pub_key() doesn't make any of these checks, and is therefore vulnerable for excessively large P and Q parameters. Likewise, while DH_generate_key() performs a check for an excessively large P, it doesn't check for an excessively large Q. An application that calls DH_generate_key() or DH_check_pub_key() and supplies a key or parameters obtained ...
Issue summary: Generating excessively long X9.42 DH keys or checking excessively long X9.42 DH keys or parameters may be very slow. Impact summary: Applications that use the functions DH_generate_key() to generate an X9.42 DH key may experience long delays. Likewise, applications that use DH_check_pub_key(), DH_check_pub_key_ex() or EVP_PKEY_public_check() to check an X9.42 DH key or X9.42 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. While DH_check() performs all the necessary checks (as of CVE-2023-3817), DH_check_pub_key() doesn't make any of these checks, and is therefore vulnerable for excessively large P and Q parameters. Likewise, while DH_generate_key() performs a check for an excessively large P, it doesn't check for an excessively large Q. An application that calls DH_generate_key() or DH_check_pub_key() and supplies a key or parameters obtaine
Issue summary: Generating excessively long X9.42 DH keys or checking e ...
EPSS
5.3 Medium
CVSS3