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CVE-2021-22923

curl: Metalink download sends credentials

When curl is instructed to get content using the metalink feature, and a user name and password are used to download the metalink XML file, those same credentials are then subsequently passed on to each of the servers from which curl will download or try to download the contents from. Often contrary to the user's expectations and intentions and without telling the user it happened.

CVSS 3.1 · 5.3 Medium EPSS 2.0% KEV · Not listed
Vendors
Fedoraproject Haxx Netapp and 4 more
Products
Fedora Curl Cloud Backup and 22 more
CVE-2021-22922

curl: Content not matching hash in Metalink is not being discarded

When curl is instructed to download content using the metalink feature, thecontents is verified against a hash provided in the metalink XML file.The metalink XML file points out to the client how to get the same contentfrom a set of different URLs, potentially hosted by different servers and theclient can then download the file from one or several of them. In a serial orparallel manner.If one of the servers hosting the contents has been breached and the contentsof the specific file on that server is replaced with a modified payload, curlshould detect this when the hash of the file mismatches after a completeddownload. It should remove the contents and instead try getting the contentsfrom another URL. This is not done, and instead such a hash mismatch is onlymentioned in text and the potentially malicious content is kept in the file ondisk.

CVSS 3.1 · 6.5 Medium EPSS 4.3% KEV · Not listed
Vendors
Fedoraproject Haxx Netapp and 4 more
Products
Fedora Curl Cloud Backup and 22 more
CVE-2021-22898

curl: TELNET stack contents disclosure

curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server, resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.

CVSS 3.1 · 3.1 Low EPSS 4.5% KEV · Not listed
Vendors
Debian Fedoraproject Haxx and 4 more
Products
Debian Linux Fedora Curl and 10 more
CVE-2021-22890

curl: TLS 1.3 session ticket mix-up with HTTPS proxy host

curl 7.63.0 to and including 7.75.0 includes vulnerability that allows a malicious HTTPS proxy to MITM a connection due to bad handling of TLS 1.3 session tickets. When using a HTTPS proxy and TLS 1.3, libcurl can confuse session tickets arriving from the HTTPS proxy but work as if they arrived from the remote server and then wrongly "short-cut" the host handshake. When confusing the tickets, a HTTPS proxy can trick libcurl to use the wrong session ticket resume for the host and thereby circumvent the server TLS certificate check and make a MITM attack to be possible to perform unnoticed. Note that such a malicious HTTPS proxy needs to provide a certificate that curl will accept for the MITMed server for an attack to work - unless curl has been told to ignore the server certificate check.

CVSS 3.1 · 4.3 Medium EPSS 3.1% KEV · Not listed
Vendors
Broadcom Debian Fedoraproject and 6 more
Products
Fabric Operating System Debian Linux Fedora and 9 more
CVE-2021-22876

curl: Leak of authentication credentials in URL via automatic Referer

curl 7.1.1 to and including 7.75.0 is vulnerable to an "Exposure of Private Personal Information to an Unauthorized Actor" by leaking credentials in the HTTP Referer: header. libcurl does not strip off user credentials from the URL when automatically populating the Referer: HTTP request header field in outgoing HTTP requests, and therefore risks leaking sensitive data to the server that is the target of the second HTTP request.

CVSS 3.1 · 5.3 Medium EPSS 5.3% KEV · Not listed
Vendors
Broadcom Debian Fedoraproject and 6 more
Products
Fabric Operating System Debian Linux Fedora and 12 more
CVE-2021-20305

nettle: Out of bounds memory access in signature verification

A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.

CVSS 3.1 · 8.1 High EPSS 1.7% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 2 more
Products
Debian Linux Fedora Active Iq Unified Manager and 7 more
CVE-2021-20232

gnutls: Use after free in client_send_params in lib/ext/pre_shared_key.c

A flaw was found in gnutls. A use after free issue in client_send_params in lib/ext/pre_shared_key.c may lead to memory corruption and other potential consequences.

CVSS 3.1 · 9.8 Critical EPSS 3.4% KEV · Not listed
Vendors
Fedoraproject Gnu Redhat
Products
Fedora Gnutls Enterprise Linux
CVE-2021-3737

python: urllib: HTTP client possible infinite loop on a 100 Continue response

A flaw was found in python. An improperly handled HTTP response in the HTTP client code of python may allow a remote attacker, who controls the HTTP server, to make the client script enter an infinite loop, consuming CPU time. The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 7.5 High EPSS 13.2% KEV · Not listed
Vendors
Canonical Fedoraproject Netapp and 3 more
Products
Ubuntu Linux Fedora Hci and 15 more
CVE-2021-3733

python: urllib: Regular expression DoS in AbstractBasicAuthHandler

There's a flaw in urllib's AbstractBasicAuthHandler class. An attacker who controls a malicious HTTP server that an HTTP client (such as web browser) connects to, could trigger a Regular Expression Denial of Service (ReDOS) during an authentication request with a specially crafted payload that is sent by the server to the client. The greatest threat that this flaw poses is to application availability.

CVSS 3.1 · 6.5 Medium EPSS 4.8% KEV · Not listed
Vendors
Fedoraproject Netapp Python and 1 more
Products
Extra Packages For Enterprise Linux Fedora Hci Compute Node Firmware and 18 more
CVE-2021-3537

libxml2: NULL pointer dereference when post-validating mixed content parsed in recovery mode

A vulnerability found in libxml2 in versions before 2.9.11 shows that it did not propagate errors while parsing XML mixed content, causing a NULL dereference. If an untrusted XML document was parsed in recovery mode and post-validated, the flaw could be used to crash the application. The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 5.9 Medium EPSS 3.6% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 3 more
Products
Debian Linux Fedora Active Iq Unified Manager and 18 more
CVE-2021-3518

libxml2: Use-after-free in xmlXIncludeDoProcess() in xinclude.c

There's a flaw in libxml2 in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by an application linked with libxml2 could trigger a use-after-free. The greatest impact from this flaw is to confidentiality, integrity, and availability.

CVSS 3.1 · 8.8 High EPSS 21.9% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 3 more
Products
Debian Linux Fedora Active Iq Unified Manager and 17 more
CVE-2021-3517

libxml2: Heap-based buffer overflow in xmlEncodeEntitiesInternal() in entities.c

There is a flaw in the xml entity encoding functionality of libxml2 in versions before 2.9.11. An attacker who is able to supply a crafted file to be processed by an application linked with the affected functionality of libxml2 could trigger an out-of-bounds read. The most likely impact of this flaw is to application availability, with some potential impact to confidentiality and integrity if an attacker is able to use memory information to further exploit the application.

CVSS 3.1 · 8.6 High EPSS 17.0% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 3 more
Products
Debian Linux Fedora Active Iq Unified Manager and 27 more
CVE-2021-3516

libxml2: Use-after-free in xmlEncodeEntitiesInternal() in entities.c

There's a flaw in libxml2's xmllint in versions before 2.9.11. An attacker who is able to submit a crafted file to be processed by xmllint could trigger a use-after-free. The greatest impact of this flaw is to confidentiality, integrity, and availability.

CVSS 3.1 · 7.8 High EPSS 2.0% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 3 more
Products
Debian Linux Fedora Clustered Data Ontap and 7 more
CVE-2021-3426

python: Information disclosure via pydoc

There's a flaw in Python 3's pydoc. A local or adjacent attacker who discovers or is able to convince another local or adjacent user to start a pydoc server could access the server and use it to disclose sensitive information belonging to the other user that they would not normally be able to access. The highest risk of this flaw is to data confidentiality. This flaw affects Python versions before 3.8.9, Python versions before 3.9.3 and Python versions before 3.10.0a7.

CVSS 3.1 · 5.7 Medium EPSS 1.9% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 3 more
Products
Debian Linux Fedora Cloud Backup and 8 more
CVE-2021-3177

python: Stack-based buffer overflow in PyCArg_repr in _ctypes/callproc.c

Python 3.x through 3.9.1 has a buffer overflow in PyCArg_repr in _ctypes/callproc.c, which may lead to remote code execution in certain Python applications that accept floating-point numbers as untrusted input, as demonstrated by a 1e300 argument to c_double.from_param. This occurs because sprintf is used unsafely.

CVSS 3.1 · 9.8 Critical EPSS 24.0% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 3 more
Products
Debian Linux Fedora Active Iq Unified Manager and 9 more
CVE-2020-28196

krb5: unbounded recursion via an ASN.1-encoded Kerberos message in lib/krb5/asn.1/asn1_encode.c may lead to DoS

MIT Kerberos 5 (aka krb5) before 1.17.2 and 1.18.x before 1.18.3 allows unbounded recursion via an ASN.1-encoded Kerberos message because the lib/krb5/asn.1/asn1_encode.c support for BER indefinite lengths lacks a recursion limit.

CVSS 3.1 · 7.5 High EPSS 4.2% KEV · Not listed
Vendors
Fedoraproject Mit Netapp and 2 more
Products
Fedora Kerberos 5 Active Iq Unified Manager and 10 more
CVE-2020-26116

python: CRLF injection via HTTP request method in httplib/http.client

http.client in Python 3.x before 3.5.10, 3.6.x before 3.6.12, 3.7.x before 3.7.9, and 3.8.x before 3.8.5 allows CRLF injection if the attacker controls the HTTP request method, as demonstrated by inserting CR and LF control characters in the first argument of HTTPConnection.request.

CVSS 3.1 · 7.2 High EPSS 6.4% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 5 more
Products
Ubuntu Linux Debian Linux Fedora and 9 more
CVE-2020-25710

openldap: assertion failure in CSN normalization with invalid input

A flaw was found in OpenLDAP in versions before 2.4.56. This flaw allows an attacker who sends a malicious packet processed by OpenLDAP to force a failed assertion in csnNormalize23(). The highest threat from this vulnerability is to system availability.

CVSS 3.1 · 7.5 High EPSS 2.7% KEV · Not listed
Vendors
Debian Fedoraproject Openldap and 1 more
Products
Debian Linux Fedora Openldap and 4 more
CVE-2020-24977

libxml2: Buffer overflow vulnerability in xmlEncodeEntitiesInternal() in entities.c

GNOME project libxml2 v2.9.10 has a global buffer over-read vulnerability in xmlEncodeEntitiesInternal at libxml2/entities.c. The issue has been fixed in commit 50f06b3e.

CVSS 3.1 · 6.5 Medium EPSS 3.0% KEV · Not listed
Vendors
Debian Fedoraproject Netapp and 4 more
Products
Debian Linux Fedora Active Iq Unified Manager and 17 more