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CVE-2018-0495

ROHNP: Key Extraction Side Channel in Multiple Crypto Libraries

Libgcrypt before 1.7.10 and 1.8.x before 1.8.3 allows a memory-cache side-channel attack on ECDSA signatures that can be mitigated through the use of blinding during the signing process in the _gcry_ecc_ecdsa_sign function in cipher/ecc-ecdsa.c, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.

CVSS 3.0 · 4.7 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Gnupg and 2 more
Products
Ubuntu Linux Debian Linux Libgcrypt and 11 more
CVE-2017-9050

libxml2: Heap-based buffer over-read in function xmlDictAddString

libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictAddString function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerability exists because of an incomplete fix for CVE-2016-1839.

CVSS 3.1 · 7.5 High EPSS 4.6% KEV · Not listed
Vendors
Redhat Xmlsoft
Products
Jboss Core Services Libxml2
CVE-2017-9049

libxml2: Heap-based buffer over-read in function xmlDictComputeFastKey

libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a heap-based buffer over-read in the xmlDictComputeFastKey function in dict.c. This vulnerability causes programs that use libxml2, such as PHP, to crash. This vulnerability exists because of an incomplete fix for libxml2 Bug 759398.

CVSS 3.1 · 7.5 High EPSS 4.6% KEV · Not listed
Vendors
Redhat Xmlsoft
Products
Jboss Core Services Libxml2
CVE-2017-9048

libxml2: Stack-based buffer overflow in function xmlSnprintfElementContent

libxml2 20904-GITv2.9.4-16-g0741801 is vulnerable to a stack-based buffer overflow. The function xmlSnprintfElementContent in valid.c is supposed to recursively dump the element content definition into a char buffer 'buf' of size 'size'. At the end of the routine, the function may strcat two more characters without checking whether the current strlen(buf) + 2 < size. This vulnerability causes programs that use libxml2, such as PHP, to crash.

CVSS 3.1 · 7.5 High EPSS 4.8% KEV · Not listed
Vendors
Redhat Xmlsoft
Products
Jboss Core Services Libxml2
CVE-2017-9047

libxml2: Buffer overflow in function xmlSnprintfElementContent

A buffer overflow was discovered in libxml2 20904-GITv2.9.4-16-g0741801. The function xmlSnprintfElementContent in valid.c is supposed to recursively dump the element content definition into a char buffer 'buf' of size 'size'. The variable len is assigned strlen(buf). If the content->type is XML_ELEMENT_CONTENT_ELEMENT, then (i) the content->prefix is appended to buf (if it actually fits) whereupon (ii) content->name is written to the buffer. However, the check for whether the content->name actually fits also uses 'len' rather than the updated buffer length strlen(buf). This allows us to write about "size" many bytes beyond the allocated memory. This vulnerability causes programs that use libxml2, such as PHP, to crash.

CVSS 3.0 · 7.5 High EPSS 3.2% KEV · Not listed
Vendors
Redhat Xmlsoft
Products
Jboss Core Services Libxml2
CVE-2017-18258

libxml2: Unrestricted memory usage in xz_head() function in xzlib.c

The xz_head function in xzlib.c in libxml2 before 2.9.6 allows remote attackers to cause a denial of service (memory consumption) via a crafted LZMA file, because the decoder functionality does not restrict memory usage to what is required for a legitimate file.

CVSS 3.0 · 6.5 Medium EPSS 2.7% KEV · Not listed
Vendors
Redhat Xmlsoft
Products
Ansible Tower Enterprise Linux Jboss Core Services and 1 more
CVE-2016-9318

libxml2: XML External Entity vulnerability

libxml2 2.9.4 and earlier, as used in XMLSec 1.2.23 and earlier and other products, does not offer a flag directly indicating that the current document may be read but other files may not be opened, which makes it easier for remote attackers to conduct XML External Entity (XXE) attacks via a crafted document.

CVSS 3.1 · 5.5 Medium EPSS 2.9% KEV · Not listed
Vendors
Canonical Redhat Xmlsec Project and 1 more
Products
Ubuntu Linux Jboss Core Services Xmlsec and 1 more
CVE-2016-5131

libxml2: Use after free triggered by XPointer paths beginning with range-to

Use-after-free vulnerability in libxml2 through 2.9.4, as used in Google Chrome before 52.0.2743.82, allows remote attackers to cause a denial of service or possibly have unspecified other impact via vectors related to the XPointer range-to function.

CVSS 3.1 · 8.8 High EPSS 2.3% KEV · Not listed
Vendors
Apple Canonical Debian and 5 more
Products
Iphone Os Mac Os X Tvos and 15 more
CVE-2021-3449

NULL pointer deref in signature_algorithms processing

An OpenSSL TLS server may crash if sent a maliciously crafted renegotiation ClientHello message from a client. If a TLSv1.2 renegotiation ClientHello omits the signature_algorithms extension (where it was present in the initial ClientHello), but includes a signature_algorithms_cert extension then a NULL pointer dereference will result, leading to a crash and a denial of service attack. A server is only vulnerable if it has TLSv1.2 and renegotiation enabled (which is the default configuration). OpenSSL TLS clients are not impacted by this issue. All OpenSSL 1.1.1 versions are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1-1.1.1j).

CVSS 3.1 · 5.9 Medium EPSS 63.5% KEV · Not listed
Vendors
Checkpoint Debian Fedoraproject and 10 more
Products
Multi-domain Management Multi-domain Management Firmware Quantum Security Gateway and 169 more
CVE-2019-20838

pcre: Buffer over-read in JIT when UTF is disabled and \X or \R has fixed quantifier greater than 1

libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and \X or \R has more than one fixed quantifier, a related issue to CVE-2019-20454.

CVSS 3.1 · 7.5 High EPSS 2.8% KEV · Not listed
Vendors
Apple Pcre Redhat and 1 more
Products
Macos Pcre Enterprise Linux and 2 more
CVE-2019-1563

Padding Oracle in PKCS7_dataDecode and CMS_decrypt_set1_pkey

In situations where an attacker receives automated notification of the success or failure of a decryption attempt an attacker, after sending a very large number of messages to be decrypted, can recover a CMS/PKCS7 transported encryption key or decrypt any RSA encrypted message that was encrypted with the public RSA key, using a Bleichenbacher padding oracle attack. Applications are not affected if they use a certificate together with the private RSA key to the CMS_decrypt or PKCS7_decrypt functions to select the correct recipient info to decrypt. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL 1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s).

CVSS 3.1 · 3.7 Low EPSS 3.8% KEV · Not listed
Vendors
Openssl Redhat
Products
Openssl Enterprise Linux Jboss Core Services
CVE-2019-1551

rsaz_512_sqr overflow bug on x86_64

There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH512 are considered just feasible. However, for an attack the target would have to re-use the DH512 private key, which is not recommended anyway. Also applications directly using the low level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME. Fixed in OpenSSL 1.1.1e (Affected 1.1.1-1.1.1d). Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t).

CVSS 3.1 · 5.3 Medium EPSS 14.3% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 5 more
Products
Ubuntu Linux Debian Linux Fedora and 8 more
CVE-2018-5407

openssl: Side-channel vulnerability on SMT/Hyper-Threading architectures (PortSmash)

Simultaneous Multi-threading (SMT) in processors can enable local users to exploit software vulnerable to timing attacks via a side-channel timing attack on 'port contention'.

CVSS 3.1 · 4.7 Medium EPSS 3.4% KEV · Not listed
Vendors
Canonical Debian Nodejs and 4 more
Products
Ubuntu Linux Debian Linux Node.js and 20 more
CVE-2018-0734

Timing attack against DSA

The OpenSSL DSA signature algorithm has been shown to be vulnerable to a timing side channel attack. An attacker could use variations in the signing algorithm to recover the private key. Fixed in OpenSSL 1.1.1a (Affected 1.1.1). Fixed in OpenSSL 1.1.0j (Affected 1.1.0-1.1.0i). Fixed in OpenSSL 1.0.2q (Affected 1.0.2-1.0.2p).

CVSS 3.1 · 5.9 Medium EPSS 12.2% KEV · Not listed
Vendors
Canonical Debian Netapp and 4 more
Products
Ubuntu Linux Debian Linux Cloud Backup and 20 more
CVE-2018-0732

Client DoS due to large DH parameter

During key agreement in a TLS handshake using a DH(E) based ciphersuite a malicious server can send a very large prime value to the client. This will cause the client to spend an unreasonably long period of time generating a key for this prime resulting in a hang until the client has finished. This could be exploited in a Denial Of Service attack. Fixed in OpenSSL 1.1.0i-dev (Affected 1.1.0-1.1.0h). Fixed in OpenSSL 1.0.2p-dev (Affected 1.0.2-1.0.2o).

CVSS 3.1 · 7.5 High EPSS 47.0% KEV · Not listed
Vendors
Canonical Debian Nodejs and 2 more
Products
Ubuntu Linux Debian Linux Node.js and 4 more
CVE-2021-3450

CA certificate check bypass with X509_V_FLAG_X509_STRICT

The X509_V_FLAG_X509_STRICT flag enables additional security checks of the certificates present in a certificate chain. It is not set by default. Starting from OpenSSL version 1.1.1h a check to disallow certificates in the chain that have explicitly encoded elliptic curve parameters was added as an additional strict check. An error in the implementation of this check meant that the result of a previous check to confirm that certificates in the chain are valid CA certificates was overwritten. This effectively bypasses the check that non-CA certificates must not be able to issue other certificates. If a "purpose" has been configured then there is a subsequent opportunity for checks that the certificate is a valid CA. All of the named "purpose" values implemented in libcrypto perform this check. Therefore, where a purpose is set the certificate chain will still be rejected even when the strict flag has been used. A purpose is set by default in libssl client and server certificate verification routines, but it can be overridden or removed by an application. In order to be affected, an application must explicitly set the X509_V_FLAG_X509_STRICT verification flag and either not set a purpose for the certificate verification or, in the case of TLS client or server applications, override the default purpose. OpenSSL versions 1.1.1h and newer are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1k. OpenSSL 1.0.2 is not impacted by this issue. Fixed in OpenSSL 1.1.1k (Affected 1.1.1h-1.1.1j).

CVSS 3.1 · 7.4 High EPSS 18.3% KEV · Not listed
Vendors
Fedoraproject Freebsd Mcafee and 8 more
Products
Fedora Freebsd Web Gateway and 36 more
CVE-2016-0718

expat: Out-of-bounds heap read on crafted input causing crash

Expat allows context-dependent attackers to cause a denial of service (crash) or possibly execute arbitrary code via a malformed input document, which triggers a buffer overflow.

CVSS 3.1 · 9.8 Critical EPSS 13.3% KEV · Not listed
Vendors
Apple Canonical Debian and 7 more
Products
Mac Os X Ubuntu Linux Debian Linux and 13 more
CVE-2023-44487

HTTP/2: Multiple HTTP/2 enabled web servers are vulnerable to a DDoS attack (Rapid Reset Attack)

The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

CVSS 3.1 · 7.5 High EPSS 100.0% KEV · Listed
Vendors
Akka Amazon Apache and 30 more
Products
Http Server Opensearch Data Prepper Apisix and 375 more