CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
20.7%
This update for libressl to version 2.8.0 fixes the following issues :
Security issues fixed :
CVE-2018-12434: Avoid a timing side-channel leak when generating DSA and ECDSA signatures. (boo#1097779)
Reject excessively large primes in DH key generation.
Other bugs fixed :
Fixed a pair of 20+ year-old bugs in X509_NAME_add_entry.
Tighten up checks for various X509_VERIFY_PARAM functions, ‘poisoning’ parameters so that an unverified certificate cannot be used if it fails verification.
Fixed a potential memory leak on failure in ASN1_item_digest.
Fixed a potential memory alignment crash in asn1_item_combine_free.
Removed unused SSL3_FLAGS_DELAY_CLIENT_FINISHED and SSL3_FLAGS_POP_BUFFER flags in write path, simplifying IO paths.
Removed SSL_OP_TLS_ROLLBACK_BUG buggy client workarounds.
Added const annotations to many existing APIs from OpenSSL, making interoperability easier for downstream applications.
Added a missing bounds check in c2i_ASN1_BIT_STRING.
Removed three remaining single DES cipher suites.
Fixed a potential leak/incorrect return value in DSA signature generation.
Added a blinding value when generating DSA and ECDSA signatures, in order to reduce the possibility of a side-channel attack leaking the private key.
Added ECC constant time scalar multiplication support.
Revised the implementation of RSASSA-PKCS1-v1_5 to match the specification in RFC 8017.
#%NASL_MIN_LEVEL 70300
#
# (C) Tenable Network Security, Inc.
#
# The descriptive text and package checks in this plugin were
# extracted from openSUSE Security Update openSUSE-2018-950.
#
# The text description of this plugin is (C) SUSE LLC.
#
include('deprecated_nasl_level.inc');
include('compat.inc');
if (description)
{
script_id(112264);
script_version("1.4");
script_set_attribute(attribute:"plugin_modification_date", value:"2024/08/12");
script_cve_id("CVE-2018-12434");
script_name(english:"openSUSE Security Update : libressl (openSUSE-2018-950)");
script_set_attribute(attribute:"synopsis", value:
"The remote openSUSE host is missing a security update.");
script_set_attribute(attribute:"description", value:
"This update for libressl to version 2.8.0 fixes the following issues :
Security issues fixed :
- CVE-2018-12434: Avoid a timing side-channel leak when
generating DSA and ECDSA signatures. (boo#1097779)
- Reject excessively large primes in DH key generation.
Other bugs fixed :
- Fixed a pair of 20+ year-old bugs in
X509_NAME_add_entry.
- Tighten up checks for various X509_VERIFY_PARAM
functions, 'poisoning' parameters so that an unverified
certificate cannot be used if it fails verification.
- Fixed a potential memory leak on failure in
ASN1_item_digest.
- Fixed a potential memory alignment crash in
asn1_item_combine_free.
- Removed unused SSL3_FLAGS_DELAY_CLIENT_FINISHED and
SSL3_FLAGS_POP_BUFFER flags in write path, simplifying
IO paths.
- Removed SSL_OP_TLS_ROLLBACK_BUG buggy client
workarounds.
- Added const annotations to many existing APIs from
OpenSSL, making interoperability easier for downstream
applications.
- Added a missing bounds check in c2i_ASN1_BIT_STRING.
- Removed three remaining single DES cipher suites.
- Fixed a potential leak/incorrect return value in DSA
signature generation.
- Added a blinding value when generating DSA and ECDSA
signatures, in order to reduce the possibility of a
side-channel attack leaking the private key.
- Added ECC constant time scalar multiplication support.
- Revised the implementation of RSASSA-PKCS1-v1_5 to match
the specification in RFC 8017.");
script_set_attribute(attribute:"see_also", value:"https://bugzilla.opensuse.org/show_bug.cgi?id=1097779");
script_set_attribute(attribute:"solution", value:
"Update the affected libressl packages.");
script_set_cvss_base_vector("CVSS2#AV:L/AC:M/Au:N/C:P/I:N/A:N");
script_set_cvss_temporal_vector("CVSS2#E:U/RL:OF/RC:C");
script_set_cvss3_base_vector("CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N");
script_set_cvss3_temporal_vector("CVSS:3.0/E:U/RL:O/RC:C");
script_set_attribute(attribute:"cvss_score_source", value:"CVE-2018-12434");
script_set_attribute(attribute:"exploitability_ease", value:"No known exploits are available");
script_set_attribute(attribute:"exploit_available", value:"false");
script_set_attribute(attribute:"patch_publication_date", value:"2018/09/03");
script_set_attribute(attribute:"plugin_publication_date", value:"2018/09/04");
script_set_attribute(attribute:"plugin_type", value:"local");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libcrypto43");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libcrypto43-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libcrypto43-32bit-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libcrypto43-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libressl");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libressl-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libressl-debugsource");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libressl-devel");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libressl-devel-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libssl45");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libssl45-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libssl45-32bit-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libssl45-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libtls17");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libtls17-32bit");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libtls17-32bit-debuginfo");
script_set_attribute(attribute:"cpe", value:"p-cpe:/a:novell:opensuse:libtls17-debuginfo");
script_set_attribute(attribute:"cpe", value:"cpe:/o:novell:opensuse:15.0");
script_end_attributes();
script_category(ACT_GATHER_INFO);
script_family(english:"SuSE Local Security Checks");
script_copyright(english:"This script is Copyright (C) 2018-2024 and is owned by Tenable, Inc. or an Affiliate thereof.");
script_dependencies("ssh_get_info.nasl");
script_require_keys("Host/local_checks_enabled", "Host/SuSE/release", "Host/SuSE/rpm-list", "Host/cpu");
exit(0);
}
include("audit.inc");
include("global_settings.inc");
include("rpm.inc");
if (!get_kb_item("Host/local_checks_enabled")) audit(AUDIT_LOCAL_CHECKS_NOT_ENABLED);
release = get_kb_item("Host/SuSE/release");
if (isnull(release) || release =~ "^(SLED|SLES)") audit(AUDIT_OS_NOT, "openSUSE");
if (release !~ "^(SUSE15\.0)$") audit(AUDIT_OS_RELEASE_NOT, "openSUSE", "15.0", release);
if (!get_kb_item("Host/SuSE/rpm-list")) audit(AUDIT_PACKAGE_LIST_MISSING);
ourarch = get_kb_item("Host/cpu");
if (!ourarch) audit(AUDIT_UNKNOWN_ARCH);
if (ourarch !~ "^(i586|i686|x86_64)$") audit(AUDIT_ARCH_NOT, "i586 / i686 / x86_64", ourarch);
flag = 0;
if ( rpm_check(release:"SUSE15.0", reference:"libcrypto43-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libcrypto43-debuginfo-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libressl-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libressl-debuginfo-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libressl-debugsource-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libressl-devel-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libssl45-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libssl45-debuginfo-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libtls17-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", reference:"libtls17-debuginfo-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"libcrypto43-32bit-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"libcrypto43-32bit-debuginfo-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"libressl-devel-32bit-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"libssl45-32bit-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"libssl45-32bit-debuginfo-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"libtls17-32bit-2.8.0-lp150.2.3.1") ) flag++;
if ( rpm_check(release:"SUSE15.0", cpu:"x86_64", reference:"libtls17-32bit-debuginfo-2.8.0-lp150.2.3.1") ) flag++;
if (flag)
{
if (report_verbosity > 0) security_note(port:0, extra:rpm_report_get());
else security_note(0);
exit(0);
}
else
{
tested = pkg_tests_get();
if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);
else audit(AUDIT_PACKAGE_NOT_INSTALLED, "libcrypto43 / libcrypto43-debuginfo / libressl / libressl-debuginfo / etc");
}
CVSS2
Attack Vector
LOCAL
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:M/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
AI Score
Confidence
High
EPSS
Percentile
20.7%