Search vulnerabilities

Use the Query Builder to create your own search query, or check out the documentation to learn the search syntax.

Results 330

Export CSV
CVE-2023-0465

Invalid certificate policies in leaf certificates are silently ignored

Applications that use a non-default option when verifying certificates may be vulnerable to an attack from a malicious CA to circumvent certain checks. Invalid certificate policies in leaf certificates are silently ignored by OpenSSL and other certificate policy checks are skipped for that certificate. A malicious CA could use this to deliberately assert invalid certificate policies in order to circumvent policy checking on the certificate altogether. Policy processing is disabled by default but can be enabled by passing the `-policy' argument to the command line utilities or by calling the `X509_VERIFY_PARAM_set1_policies()' function.

CVSS 3.1 · 5.3 Medium EPSS 1.8% KEV · Not listed
Vendors
Openssl Redhat
Products
Openssl Enterprise Linux Jboss Core Services and 1 more
CVE-2023-0464

Excessive Resource Usage Verifying X.509 Policy Constraints

A security vulnerability has been identified in all supported versions of OpenSSL related to the verification of X.509 certificate chains that include policy constraints. Attackers may be able to exploit this vulnerability by creating a malicious certificate chain that triggers exponential use of computational resources, leading to a denial-of-service (DoS) attack on affected systems. Policy processing is disabled by default but can be enabled by passing the `-policy' argument to the command line utilities or by calling the `X509_VERIFY_PARAM_set1_policies()' function.

CVSS 3.1 · 7.5 High EPSS 4.0% KEV · Not listed
Vendors
Openssl Redhat
Products
Openssl Enterprise Linux Jboss Core Services and 1 more
CVE-2023-0286

X.400 address type confusion in X.509 GeneralName

There is a type confusion vulnerability relating to X.400 address processing inside an X.509 GeneralName. X.400 addresses were parsed as an ASN1_STRING but the public structure definition for GENERAL_NAME incorrectly specified the type of the x400Address field as ASN1_TYPE. This field is subsequently interpreted by the OpenSSL function GENERAL_NAME_cmp as an ASN1_TYPE rather than an ASN1_STRING. When CRL checking is enabled (i.e. the application sets the X509_V_FLAG_CRL_CHECK flag), this vulnerability may allow an attacker to pass arbitrary pointers to a memcmp call, enabling them to read memory contents or enact a denial of service. In most cases, the attack requires the attacker to provide both the certificate chain and CRL, neither of which need to have a valid signature. If the attacker only controls one of these inputs, the other input must already contain an X.400 address as a CRL distribution point, which is uncommon. As such, this vulnerability is most likely to only affect applications which have implemented their own functionality for retrieving CRLs over a network.

CVSS 3.1 · 7.4 High EPSS 68.4% KEV · Not listed
Vendors
Openssl Redhat Stormshield
Products
Openssl Enterprise Linux Jboss Core Services and 10 more
CVE-2023-0215

Use-after-free following BIO_new_NDEF

The public API function BIO_new_NDEF is a helper function used for streaming ASN.1 data via a BIO. It is primarily used internally to OpenSSL to support the SMIME, CMS and PKCS7 streaming capabilities, but may also be called directly by end user applications. The function receives a BIO from the caller, prepends a new BIO_f_asn1 filter BIO onto the front of it to form a BIO chain, and then returns the new head of the BIO chain to the caller. Under certain conditions, for example if a CMS recipient public key is invalid, the new filter BIO is freed and the function returns a NULL result indicating a failure. However, in this case, the BIO chain is not properly cleaned up and the BIO passed by the caller still retains internal pointers to the previously freed filter BIO. If the caller then goes on to call BIO_pop() on the BIO then a use-after-free will occur. This will most likely result in a crash. This scenario occurs directly in the internal function B64_write_ASN1() which may cause BIO_new_NDEF() to be called and will subsequently call BIO_pop() on the BIO. This internal function is in turn called by the public API functions PEM_write_bio_ASN1_stream, PEM_write_bio_CMS_stream, PEM_write_bio_PKCS7_stream, SMIME_write_ASN1, SMIME_write_CMS and SMIME_write_PKCS7. Other public API functions that may be impacted by this include i2d_ASN1_bio_stream, BIO_new_CMS, BIO_new_PKCS7, i2d_CMS_bio_stream and i2d_PKCS7_bio_stream. The OpenSSL cms and smime command line applications are similarly affected.

CVSS 3.1 · 7.5 High EPSS 5.0% KEV · Not listed
Vendors
Openssl Redhat Stormshield
Products
Openssl Enterprise Linux Jboss Core Services and 3 more
CVE-2022-43680

expat: use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate

In libexpat through 2.4.9, there is a use-after free caused by overeager destruction of a shared DTD in XML_ExternalEntityParserCreate in out-of-memory situations.

CVSS 3.1 · 7.5 High EPSS 3.2% KEV · Not listed
Vendors
Debian Fedoraproject Libexpat Project and 2 more
Products
Debian Linux Fedora Libexpat and 21 more
CVE-2022-43552

curl: Use-after-free triggered by an HTTP proxy deny response

A use after free vulnerability exists in curl <7.87.0. Curl can be asked to *tunnel* virtually all protocols it supports through an HTTP proxy. HTTP proxies can (and often do) deny such tunnel operations. When getting denied to tunnel the specific protocols SMB or TELNET, curl would use a heap-allocated struct after it had been freed, in its transfer shutdown code path.

CVSS 3.1 · 5.9 Medium EPSS 2.7% KEV · Not listed
Vendors
Apple Haxx Redhat and 1 more
Products
Macos Curl Enterprise Linux and 3 more
CVE-2022-43551

curl: HSTS bypass via IDN

A vulnerability exists in curl <7.87.0 HSTS check that could be bypassed to trick it to keep using HTTP. Using its HSTS support, curl can be instructed to use HTTPS instead of using an insecure clear-text HTTP step even when HTTP is provided in the URL. However, the HSTS mechanism could be bypassed if the host name in the given URL first uses IDN characters that get replaced to ASCII counterparts as part of the IDN conversion. Like using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop (U+002E) `.`. Then in a subsequent request, it does not detect the HSTS state and makes a clear text transfer. Because it would store the info IDN encoded but look for it IDN decoded.

CVSS 3.1 · 7.5 High EPSS 16.6% KEV · Not listed
Vendors
Fedoraproject Haxx Netapp and 2 more
Products
Fedora Curl Active Iq Unified Manager and 5 more
CVE-2022-42916

curl: HSTS bypass via IDN

In curl before 7.86.0, the HSTS check could be bypassed to trick it into staying with HTTP. Using its HSTS support, curl can be instructed to use HTTPS directly (instead of using an insecure cleartext HTTP step) even when HTTP is provided in the URL. This mechanism could be bypassed if the host name in the given URL uses IDN characters that get replaced with ASCII counterparts as part of the IDN conversion, e.g., using the character UTF-8 U+3002 (IDEOGRAPHIC FULL STOP) instead of the common ASCII full stop of U+002E (.). The earliest affected version is 7.77.0 2021-05-26.

CVSS 3.1 · 7.5 High EPSS 2.5% KEV · Not listed
Vendors
Apple Fedoraproject Haxx and 2 more
Products
Macos Fedora Curl and 2 more
CVE-2022-42915

curl: HTTP proxy double-free

curl before 7.86.0 has a double free. If curl is told to use an HTTP proxy for a transfer with a non-HTTP(S) URL, it sets up the connection to the remote server by issuing a CONNECT request to the proxy, and then tunnels the rest of the protocol through. An HTTP proxy might refuse this request (HTTP proxies often only allow outgoing connections to specific port numbers, like 443 for HTTPS) and instead return a non-200 status code to the client. Due to flaws in the error/cleanup handling, this could trigger a double free in curl if one of the following schemes were used in the URL for the transfer: dict, gopher, gophers, ldap, ldaps, rtmp, rtmps, or telnet. The earliest affected version is 7.77.0.

CVSS 3.1 · 8.1 High EPSS 3.7% KEV · Not listed
Vendors
Apple Fedoraproject Haxx and 3 more
Products
Macos Fedora Curl and 11 more
CVE-2022-40304

libxml2: dict corruption caused by entity reference cycles

An issue was discovered in libxml2 before 2.10.3. Certain invalid XML entity definitions can corrupt a hash table key, potentially leading to subsequent logic errors. In one case, a double-free can be provoked.

CVSS 3.1 · 7.8 High EPSS 5.8% KEV · Not listed
Vendors
Apple Netapp Redhat and 1 more
Products
Ipados Iphone Os Macos and 22 more
CVE-2022-40303

libxml2: integer overflows with XML_PARSE_HUGE

An issue was discovered in libxml2 before 2.10.3. When parsing a multi-gigabyte XML document with the XML_PARSE_HUGE parser option enabled, several integer counters can overflow. This results in an attempt to access an array at a negative 2GB offset, typically leading to a segmentation fault.

CVSS 3.1 · 7.5 High EPSS 41.4% KEV · Not listed
Vendors
Apple Netapp Redhat and 1 more
Products
Ipados Iphone Os Macos and 22 more
CVE-2022-35252

curl: Incorrect handling of control code characters in cookies

When curl is used to retrieve and parse cookies from a HTTP(S) server, itaccepts cookies using control codes that when later are sent back to a HTTPserver might make the server return 400 responses. Effectively allowing a"sister site" to deny service to all siblings.

CVSS 3.1 · 3.7 Low EPSS 3.8% KEV · Not listed
Vendors
Apple Debian Haxx and 3 more
Products
Macos Debian Linux Curl and 18 more
CVE-2022-32221

curl: POST following PUT confusion

When doing HTTP(S) transfers, libcurl might erroneously use the read callback (`CURLOPT_READFUNCTION`) to ask for data to send, even when the `CURLOPT_POSTFIELDS` option has been set, if the same handle previously was used to issue a `PUT` request which used that callback. This flaw may surprise the application and cause it to misbehave and either send off the wrong data or use memory after free or similar in the subsequent `POST` request. The problem exists in the logic for a reused handle when it is changed from a PUT to a POST.

CVSS 3.1 · 9.8 Critical EPSS 5.1% KEV · Not listed
Vendors
Apple Debian Haxx and 3 more
Products
Macos Debian Linux Curl and 13 more
CVE-2022-32208

curl: FTP-KRB bad message verification

When curl < 7.84.0 does FTP transfers secured by krb5, it handles message verification failures wrongly. This flaw makes it possible for a Man-In-The-Middle attack to go unnoticed and even allows it to inject data to the client.

CVSS 3.1 · 5.9 Medium EPSS 8.4% KEV · Not listed
Vendors
Apple Debian Fedoraproject and 4 more
Products
Macos Debian Linux Fedora and 18 more
CVE-2022-32207

curl: Unpreserved file permissions

When curl < 7.84.0 saves cookies, alt-svc and hsts data to local files, it makes the operation atomic by finalizing the operation with a rename from a temporary name to the final target file name.In that rename operation, it might accidentally *widen* the permissions for the target file, leaving the updated file accessible to more users than intended.

CVSS 3.1 · 9.8 Critical EPSS 12.3% KEV · Not listed
Vendors
Apple Debian Fedoraproject and 4 more
Products
Macos Debian Linux Fedora and 18 more
CVE-2022-32206

curl: HTTP compression denial of service

curl < 7.84.0 supports "chained" HTTP compression algorithms, meaning that a serverresponse can be compressed multiple times and potentially with different algorithms. The number of acceptable "links" in this "decompression chain" was unbounded, allowing a malicious server to insert a virtually unlimited number of compression steps.The use of such a decompression chain could result in a "malloc bomb", makingcurl end up spending enormous amounts of allocated heap memory, or trying toand returning out of memory errors.

CVSS 3.1 · 6.5 Medium EPSS 36.3% KEV · Not listed
Vendors
Debian Fedoraproject Haxx and 4 more
Products
Debian Linux Fedora Curl and 32 more
CVE-2022-29824

libxml2: integer overflows in xmlBuf and xmlBuffer lead to out-of-bounds write

In libxml2 before 2.9.14, several buffer handling functions in buf.c (xmlBuf*) and tree.c (xmlBuffer*) don't check for integer overflows. This can result in out-of-bounds memory writes. Exploitation requires a victim to open a crafted, multi-gigabyte XML file. Other software using libxml2's buffer functions, for example libxslt through 1.1.35, is affected as well.

CVSS 3.1 · 6.5 Medium EPSS 3.8% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 3 more
Products
Debian Linux Fedora Active Iq Unified Manager and 23 more
CVE-2022-27781

curl: CERTINFO never-ending busy-loop

libcurl provides the `CURLOPT_CERTINFO` option to allow applications torequest details to be returned about a server's certificate chain.Due to an erroneous function, a malicious server could make libcurl built withNSS get stuck in a never-ending busy-loop when trying to retrieve thatinformation.

CVSS 3.1 · 7.5 High EPSS 2.9% KEV · Not listed
Vendors
Debian Haxx Netapp and 2 more
Products
Debian Linux Curl Clustered Data Ontap and 14 more