A malicious HTTP/2 client which rapidly creates requests and immediately resets them can cause excessive server resource consumption. While the total number of requests is bounded by the http2.Server.MaxConcurrentStreams setting, resetting an in-progress request allows the attacker to create a new request while the existing one is still executing.
With the fix applied, HTTP/2 servers now bound the number of simultaneously executing handler goroutines to the stream concurrency limit (MaxConcurrentStreams). New requests arriving when at the limit (which can only happen after the client has reset an existing, in-flight request) will be queued until a handler exits. If the request queue grows too large, the server will terminate the connection.
This issue is also fixed in golang.org/x/net/http2 for users manually configuring HTTP/2.
The default stream concurrency limit is 250 streams (requests) per HTTP/2 connection. This value may be adjusted using the golang.org/x/net/http2 package; see the Server.MaxConcurrentStreams setting and the ConfigureServer function.
Golang Go could allow a local authenticated attacker to gain elevated privileges on the system, caused by a flaw when a binary is run with the setuid/setgid bits. By sending a specially crafted request, an authenticated attacker could exploit this vulnerability to gain elevated privileges. to read or write contents of the registers.
Arbitrary code execution during build via line directives in cmd/go
Summary
Terrapin is a prefix truncation attack targeting the SSH protocol. More precisely, Terrapin breaks the integrity of SSH's secure channel. By carefully adjusting the sequence numbers during the handshake, an attacker can remove an arbitrary amount of messages sent by the client or server at the beginning of the secure channel without the client or server noticing it.
Mitigations
To mitigate this protocol vulnerability, OpenSSH suggested a so-called "strict kex" which alters the SSH handshake to ensure a Man-in-the-Middle attacker cannot introduce unauthenticated messages as well as convey sequence number manipulation across handshakes.
Warning: To take effect, both the client and server must support this countermeasure.
As a stop-gap measure, peers may also (temporarily) disable the affected algorithms and use unaffected alternatives like AES-GCM instead until patches are available.
Details
The SSH specifications of ChaCha20-Poly1305 (chacha20-poly1305@openssh.com) and Encrypt-then-MAC (-etm@openssh.com MACs) are vulnerable against an arbitrary prefix truncation attack (a.k.a. Terrapin attack). This allows for an extension negotiation downgrade by stripping the SSHMSGEXTINFO sent after the first message after SSHMSGNEWKEYS, downgrading security, and disabling attack countermeasures in some versions of OpenSSH. When targeting Encrypt-then-MAC, this attack requires the use of a CBC cipher to be practically exploitable due to the internal workings of the cipher mode. Additionally, this novel attack technique can be used to exploit previously unexploitable implementation flaws in a Man-in-the-Middle scenario.
The attack works by an attacker injecting an arbitrary number of SSHMSGIGNORE messages during the initial key exchange and consequently removing the same number of messages just after the initial key exchange has concluded. This is possible due to missing authentication of the excess SSHMSGIGNORE messages and the fact that the implicit sequence numbers used within the SSH protocol are only checked after the initial key exchange.
In the case of ChaCha20-Poly1305, the attack is guaranteed to work on every connection as this cipher does not maintain an internal state other than the message's sequence number. In the case of Encrypt-Then-MAC, practical exploitation requires the use of a CBC cipher; while theoretical integrity is broken for all ciphers when using this mode, message processing will fail at the application layer for CTR and stream ciphers.
For more details see https://terrapin-attack.com.
Impact
This attack targets the specification of ChaCha20-Poly1305 (chacha20-poly1305@openssh.com) and Encrypt-then-MAC (-etm@openssh.com), which are widely adopted by well-known SSH implementations and can be considered de-facto standard. These algorithms can be practically exploited; however, in the case of Encrypt-Then-MAC, we additionally require the use of a CBC cipher. As a consequence, this attack works against all well-behaving SSH implementations supporting either of those algorithms and can be used to downgrade (but not fully strip) connection security in case SSH extension negotiation (RFC8308) is supported. The attack may also enable attackers to exploit certain implementation flaws in a man-in-the-middle (MitM) scenario.
Golang Go could allow a remote attacker to execute arbitrary code on the system, caused by a flaw when running "go get" on a malicious module. By sending a specially crafted request using linker flags, an attacker could exploit this vulnerability to execute arbitrary code on the system.
An issue was discovered in Mbed TLS 2.18.0 through 2.28.x before 2.28.8 and 3.x before 3.6.0 and Mbed Crypto. The PSA Crypto API mishandles shared memory.
Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.
An attacker can cause excessive memory growth in a Go server accepting HTTP/2 requests. HTTP/2 server connections contain a cache of HTTP header keys sent by the client. While the total number of entries in this cache is capped, an attacker sending very large keys can cause the server to allocate approximately 64 MiB per open connection.
libexpat could allow a remote attacker to obtain sensitive information, caused by improper handling of XML external entity (XXE) declarations by the XMLExternalEntityParserCreate function. By using a specially crafted XML content, a remote attacker could exploit this vulnerability to obtain sensitive information, and use this information to launch further attacks against the affected system.
A vulnerability was found in Ghostscript. This flaw occurs due to a mishandled permission validation for pipe devices (with the %pipe% prefix or the | pipe character prefix).
An out-of-bounds write vulnerability exists in the JPEG2000Codec::DecodeByStreamsCommon functionality of Mathieu Malaterre Grassroot DICOM 3.0.23. A specially crafted DICOM file can lead to a heap buffer overflow. An attacker can provide a malicious file to trigger this vulnerability.
A security issue was discovered in Kubelet that allows pods to bypass the seccomp profile enforcement. Pods that use localhost type for seccomp profile but specify an empty profile field, are affected by this issue. In this scenario, this vulnerability allows the pod to run in unconfined (seccomp disabled) mode. This bug affects Kubelet.
A security issue was discovered in Kubernetes where a user that can create pods and persistent volumes on Windows nodes may be able to escalate to admin privileges on those nodes. Kubernetes clusters are only affected if they are using an in-tree storage plugin for Windows nodes.
CVE-2022-24834 - A specially crafted Lua script executing in Redis can trigger a heap overflow in the cjson and cmsgpack libraries, and result in heap corruption and potentially remote code execution. The problem exists in all versions of Redis with Lua scripting support, starting from 2.6, and affects only authenticated and authorized users.
https://github.com/redis/redis/security/advisories/GHSA-p8x2-9v9q-c838
CVE-2023-2454: CREATE SCHEMA ... schemaelement defeats protective searchpath changes.
Versions Affected: 11 - 15. This problem is quite old.
This enabled an attacker having database-level CREATE privilege to execute arbitrary code as the bootstrap superuser. Database owners have that right by default, and explicit grants may extend it to other users.
https://www.postgresql.org/support/security/CVE-2023-2454/
CVE-2023-2455: Row security policies disregard user ID changes after inlining.
Versions Affected: 11 - 15. This problem is quite old.
While CVE-2016-2193 fixed most interaction between row security and user ID changes, it missed a scenario involving function inlining. This leads to potentially incorrect policies being applied in cases where role-specific policies are used and a given query is planned under one role and then executed under other roles. This scenario can happen under security definer functions or when a common user and query is planned initially and then re-used across multiple SET ROLEs. Applying an incorrect policy may permit a user to complete otherwise-forbidden reads and modifications. This affects only databases that have used CREATE POLICY to define a row security policy.
https://www.postgresql.org/support/security/CVE-2023-2455/
EmailValidator and URLValidator were subject to potential regular expression denial of service attack via a very large number of domain name labels of emails and URLs.
Affected versions: Django main development branch, Django 4.2, Django 4.1, Django 3.2
Certifi 2023.07.22 removes root certificates from "e-Tugra" from the root store. These are in the process of being removed from Mozilla's trust store.
e-Tugra's root certificates are being removed pursuant to an investigation prompted by reporting of security issues in their systems. Conclusions of Mozilla's investigation can be found here.
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nftsetpipapo: walk over current view on netlink dump
The generation mask can be updated while netlink dump is in progress. The pipapo set backend walk iterator cannot rely on it to infer what view of the datastructure is to be used. Add notation to specify if user wants to read/update the set.
Based on patch from Florian Westphal.
In the Linux kernel, the following vulnerability has been resolved:
netfilter: nftables: Fix potential data-race in nftobjtypeget()
nftunregisterobj() can concurrent with nftobjtypeget(), and there is not any protection when iterate over nftablesobjects list in nftobjtypeget(). Therefore, there is potential data-race of nftablesobjects list entry.
Use listforeachentryrcu() to iterate over nftablesobjects list in nftobjtypeget(), and use rcureadlock() in the caller nftobjtypeget() to protect the entire type query process.
In the Linux kernel, the following vulnerability has been resolved:
net/mlx5e: Prevent deadlock while disabling aRFS
The Linux kernel CVE team has assigned CVE-2024-27014 to this issue.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024050149-CVE-2024-27014-d2dc@gregkh/T
Fixed bug GHSA-3qrf-m4j2-pcrr (Security issue with external entity loading in XML without enabling it). (CVE-2023-3823)
Buffer overflow and overread in phardirread()
Accounts. The issue was addressed with improved checks.
Accounts. The issue was addressed with improved checks.
Impact
If an attacker can alter the integrity option passed to fetch(), they can let fetch() accept requests as valid even if they have been tampered.
Patches
Fixed in https://github.com/nodejs/undici/commit/d542b8cd39ec1ba303f038ea26098c3f355974f3. Fixes has been released in v5.28.4 and v6.11.1.
Workarounds
Ensure that integrity cannot be tampered with.
References
https://hackerone.com/reports/2377760
Impact
Undici cleared Authorization and Proxy-Authorization headers for fetch(), but did not clear them for undici.request().
Patches
This has been patched in https://github.com/nodejs/undici/commit/6805746680d27a5369d7fb67bc05f95a28247d75. Fixes has been released in v5.28.4 and v6.11.1.
Workarounds
use fetch() or disable maxRedirections.
References
Linzi Shang reported this.
https://hackerone.com/reports/2408074 https://github.com/nodejs/undici/security/advisories/GHSA-3787-6prv-h9w3
Last updated 24 July 2024
Accounts. The issue was addressed with improved checks.
Impact An attacker could send a JWE containing compressed data that used large amounts of memory and CPU when decompressed by Decrypt or DecryptMulti. Those functions now return an error if the decompressed data would exceed 250kB or 10x the compressed size (whichever is larger). Thanks to Enze Wang@Alioth and Jianjun Chen@Zhongguancun Lab (@zer0yu and @chenjj) for reporting.
Patches The problem is fixed in the following packages and versions: - github.com/go-jose/go-jose/v4 version 4.0.1 - github.com/go-jose/go-jose/v3 version 3.0.3 - gopkg.in/go-jose/go-jose.v2 version 2.6.3
The problem will not be fixed in the following package because the package is archived: - gopkg.in/square/go-jose.v2