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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-2022-43551

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-2022-42915

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-2022-36946

kernel: DoS in nfqnl_mangle in net/netfilter/nfnetlink_queue.c

nfqnl_mangle in net/netfilter/nfnetlink_queue.c in the Linux kernel through 5.18.14 allows remote attackers to cause a denial of service (panic) because, in the case of an nf_queue verdict with a one-byte nfta_payload attribute, an skb_pull can encounter a negative skb->len.

CVSS 3.1 · 7.5 High EPSS 8.9% KEV · Not listed
Vendors
Debian Linux Netapp and 1 more
Products
Debian Linux Linux Kernel Active Iq Unified Manager and 7 more
CVE-2022-36879

kernel: xfrm_expand_policies() in net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice

An issue was discovered in the Linux kernel through 5.18.14. xfrm_expand_policies in net/xfrm/xfrm_policy.c can cause a refcount to be dropped twice.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Debian Linux Netapp and 1 more
Products
Debian Linux Linux Kernel A700s and 43 more
CVE-2022-36123

kernel: lacks a certain clear operation for the block starting symbol (.bss) cause a denial of service or gain privileges

The Linux kernel before 5.18.13 lacks a certain clear operation for the block starting symbol (.bss). This allows Xen PV guest OS users to cause a denial of service or gain privileges.

CVSS 3.1 · 7.8 High EPSS < 1% KEV · Not listed
Vendors
Linux Netapp
Products
Linux Kernel H300s H300s Firmware and 8 more
CVE-2022-35260

curl: .netrc parser out-of-bounds access

curl can be told to parse a `.netrc` file for credentials. If that file endsin a line with 4095 consecutive non-white space letters and no newline, curlwould first read past the end of the stack-based buffer, and if the readworks, write a zero byte beyond its boundary.This will in most cases cause a segfault or similar, but circumstances might also cause different outcomes.If a malicious user can provide a custom netrc file to an application or otherwise affect its contents, this flaw could be used as denial-of-service.

CVSS 3.1 · 6.5 Medium EPSS 2.7% KEV · Not listed
Vendors
Apple Haxx Netapp and 1 more
Products
Macos Curl Clustered Data Ontap and 9 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-2022-34918

kernel: heap overflow in nft_set_elem_init()

An issue was discovered in the Linux kernel through 5.18.9. A type confusion bug in nft_set_elem_init (leading to a buffer overflow) could be used by a local attacker to escalate privileges, a different vulnerability than CVE-2022-32250. (The attacker can obtain root access, but must start with an unprivileged user namespace to obtain CAP_NET_ADMIN access.) This can be fixed in nft_setelem_parse_data in net/netfilter/nf_tables_api.c.

CVSS 3.1 · 7.8 High EPSS 5.5% KEV · Not listed
Vendors
Canonical Debian Linux and 2 more
Products
Ubuntu Linux Debian Linux Linux Kernel and 11 more
CVE-2022-32250

kernel: a use-after-free write in the netfilter subsystem can lead to privilege escalation to root

net/netfilter/nf_tables_api.c in the Linux kernel through 5.18.1 allows a local user (able to create user/net namespaces) to escalate privileges to root because an incorrect NFT_STATEFUL_EXPR check leads to a use-after-free.

CVSS 3.1 · 7.8 High EPSS 2.9% KEV · Not listed
Vendors
Debian Fedoraproject Linux and 2 more
Products
Debian Linux Fedora Linux Kernel and 17 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-2022-32205

curl: Set-Cookie denial of service

A malicious server can serve excessive amounts of `Set-Cookie:` headers in a HTTP response to curl and curl < 7.84.0 stores all of them. A sufficiently large amount of (big) cookies make subsequent HTTP requests to this, or other servers to which the cookies match, create requests that become larger than the threshold that curl uses internally to avoid sending crazy large requests (1048576 bytes) and instead returns an error.This denial state might remain for as long as the same cookies are kept, match and haven't expired. Due to cookie matching rules, a server on `foo.example.com` can set cookies that also would match for `bar.example.com`, making it it possible for a "sister server" to effectively cause a denial of service for a sibling site on the same second level domain using this method.

CVSS 3.1 · 4.3 Medium EPSS 31.5% KEV · Not listed
Vendors
Apple Debian Fedoraproject and 4 more
Products
Macos Debian Linux Fedora and 26 more
CVE-2022-30115

curl: HSTS bypass via trailing dot

Using its HSTS support, curl can be instructed to use HTTPS directly insteadof using an insecure clear-text HTTP step even when HTTP is provided in theURL. This mechanism could be bypassed if the host name in the given URL used atrailing dot while not using one when it built the HSTS cache. Or the otherway around - by having the trailing dot in the HSTS cache and *not* using thetrailing dot in the URL.

CVSS 3.1 · 4.3 Medium EPSS 1.4% KEV · Not listed
Vendors
Haxx Netapp Splunk
Products
Curl Clustered Data Ontap H300s and 12 more