A flaw was found in the Linux kernel's implementation of some networking protocols in IPsec, such as VXLAN and GENEVE tunnels over IPv6. When an encrypted tunnel is created between two hosts, the kernel isn't correctly routing tunneled data over the encrypted link; rather sending the data unencrypted. This would allow anyone in between the two endpoints to read the traffic unencrypted. The main threat from this vulnerability is to data confidentiality.

A flaw was found in the Linux kernel loose validation of child/parent process identification handling while filtering signal handlers. A local attacker is able to abuse this flaw to bypass checks to send any signal to a privileged process.

A flaw was found in the Linux Kernel in versions after 4.5-rc1 in the way mremap handled DAX Huge Pages. This flaw allows a local attacker with access to a DAX enabled storage to escalate their privileges on the system.

A flaw was found in the Linux kernel's implementation of Logical Link Control and Adaptation Protocol (L2CAP), part of the Bluetooth stack. An attacker, within the range of standard Bluetooth transmissions, can create and send a specially crafted packet. The response to this specially crafted packet can contain part of the kernel stack which can be used in a further attack.

A flaw was found in the Linux kernel in the NFS41+ subsystem. NFS41+ shares mounted in different network namespaces at the same time can make bcsvcprocess() use wrong back-channel id and cause a use-after-free. Thus a malicious container user can cause a host kernel memory corruption and a system panic. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely.

References:

https://seclists.org/oss-sec/2018/q4/267

A proposed patchset:

https://patchwork.kernel.org/cover/10733767/

https://patchwork.kernel.org/patch/10733769/

kernel/auditsc.c in the Linux kernel through 3.14.5, when CONFIGAUDITSYSCALL is enabled with certain syscall rules, allows local users to obtain potentially sensitive single-bit values from kernel memory or cause a denial of service (OOPS) via a large value of a syscall number.

Last updated 24 July 2024

An integer overflow flaw was found in the way the Linux kernel's networking subsystem processed TCP Selective Acknowledgment (SACK) segments. While processing SACK segments, the Linux kernel's socket buffer (SKB) data structure becomes fragmented. Each fragment is about TCP maximum segment size (MSS) bytes. To efficiently process SACK blocks, the Linux kernel merges multiple fragmented SKBs into one, potentially overflowing the variable holding the number of segments. A remote attacker could use this flaw to crash the Linux kernel by sending a crafted sequence of SACK segments on a TCP connection with small value of TCP MSS, resulting in a denial of service (DoS).

A flaw was found in the Linux Kernel. A use-after-free vulnerability was discovered in the ftrace ring buffer resizing logic due to a race condition.

Reference and upstream patch: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=bbeb97464eefc65f506084fd9f18f21653e01137

Last updated 24 July 2024

Last updated 24 July 2024

Last updated 24 July 2024

In the Linux kernel before version 4.12, Kerberos 5 tickets decoded when using the RXRPC keys incorrectly assumes the size of a field. This could lead to the size-remaining variable wrapping and the data pointer going over the end of the buffer. This could possibly lead to memory corruption and possible privilege escalation.

The Python client in Apache Qpid before 2.2 does not verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via an arbitrary valid certificate.

A flaw was discovered in cumin where it would log broker authentication credentials to the cumin log file. A local user exploiting this flaw could connect to the broker outside of cumin's control and perform certain operations such as scheduling jobs, setting attributes on jobs, as well as holding, releasing or removing jobs. The user could also use this to, depending on the defined ACLs of the broker, manipulate message queues and other privileged operations.

Cumin before 0.1.5444, as used in Red Hat Enterprise Messaging, Realtime, and Grid (MRG) 2.0, allows remote authenticated users to modify Condor attributes and possibly gain privileges via crafted additional parameters in an HTTP POST request, which triggers a job attribute change request to Condor.

cumin: At installation postgresql database user created without password

Multiple cross-site scripting (XSS) vulnerabilities in Cumin before 0.1.5444, as used in Red Hat Enterprise Messaging, Realtime, and Grid (MRG) 2.0, allow remote attackers to inject arbitrary web script or HTML via unspecified vectors related to (1) "error message displays" or (2) "in source HTML on certain pages."

Session fixation vulnerability in Cumin before 0.1.5444, as used in Red Hat Enterprise Messaging, Realtime, and Grid (MRG) 2.0, allows remote attackers to hijack web sessions via a crafted session cookie.

Multiple cross-site request forgery (CSRF) vulnerabilities in Cumin before 0.1.5444, as used in Red Hat Enterprise Messaging, Realtime, and Grid (MRG) 2.0, allow remote attackers to hijack the authentication of arbitrary users for requests that execute commands via unspecified vectors.

Cumin before 0.1.5444, as used in Red Hat Enterprise Messaging, Realtime, and Grid (MRG) 2.0, does not properly restrict access to resources, which allows remote attackers to obtain sensitive information via unspecified vectors related to (1) "web pages," (2) "export functionality," and (3) "image viewing."

Cumin before 0.1.5444, as used in Red Hat Enterprise Messaging, Realtime, and Grid (MRG) 2.0, uses predictable random numbers to generate session keys, which makes it easier for remote attackers to guess the session key.

Multiple SQL injection vulnerabilities in the getsamplefiltersbysignature function in Cumin before 0.1.5444, as used in Red Hat Enterprise Messaging, Realtime, and Grid (MRG) 2.0, allow remote attackers to execute arbitrary SQL commands via the (1) agent or (2) object id.

Cumin before 0.1.5444, as used in Red Hat Enterprise Messaging, Realtime, and Grid (MRG) 2.0, allows remote authenticated users to cause a denial of service (memory consumption) via a large size in an image request.

Nokogiri gem 1.5.x and 1.6.x has DoS while parsing XML entities by failing to apply limits

Nokogiri gem 1.5.x has Denial of Service via infinite loop when parsing XML documents

In sgio, blkrqmapuser{,iov} may allocate a set of bounce buffer pages to do the bio, if it finds the user buffer cannot be directly mapped. But the allocated pages are not cleared.

If the bounce buffer is also not written to by device, garbage data is left, and copied back to user in blkrqunmapuser.

The allocated pages should be cleared. This also eliminates the risk of leaking sensitive information to userspace, which may have a security impact.

This flaw is specific to RHEL-7 and does not affect the current upstream kernel.