Fedora Project Fedora 35

snapd could be made to escalate privileges and run programs as administrator

insufficient TLB flush for x86 PV guests in shadow mode For migration as well as to work around kernels unaware of L1TF (see XSA-273), PV guests may be run in shadow paging mode. To address XSA-401, code was moved inside a function in Xen. This code movement missed a variable changing meaning / value between old and new code positions. The now wrong use of the variable did lead to a wrong TLB flush condition, omitting flushes where such are necessary.

certain VT-d IOMMUs may not work in shared page table mode For efficiency reasons, address translation control structures (page tables) may (and, on suitable hardware, by default will) be shared between CPUs, for second-level translation (EPT), and IOMMUs. These page tables are presently set up to always be 4 levels deep. However, an IOMMU may require the use of just 3 page table levels. In such a configuration the lop level table needs to be stripped before inserting the root table's address into the hardware pagetable base register. When sharing page tables, Xen erroneously skipped this stripping. Consequently, the guest is able to write to leaf page table entries.

Xenstore: Guests can crash xenstored Due to a bug in the fix of XSA-115 a malicious guest can cause xenstored to use a wrong pointer during node creation in an error path, resulting in a crash of xenstored or a memory corruption in xenstored causing further damage. Entering the error path can be controlled by the guest e.g. by exceeding the quota value of maximum nodes per domain.

A Server-Side Forgery Request can be activated unmarshalling with XStream to access data streams from an arbitrary URL referencing a resource in an intranet or the local host

ClamAV CHM File Parsing Denial of Service Vulnerability Affecting Cisco Products: April 2022

guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound.

Permissions granted to applications can be hidden from the user at install time

Heap-based Buffer Overflow in vim/vim

Use after Free in tc_new_tfilter allowing for privilege escalation in Linux Kernel

XStream is vulnerable to a Remote Command Execution attack

Apache Log4j2 vulnerable to RCE via JDBC Appender when attacker controls configuration

XStream is vulnerable to an Arbitrary Code Execution attack

XStream is vulnerable to an Arbitrary Code Execution attack

A Server-Side Forgery Request vulnerability in XStream via HashMap unmarshaling

XStream is vulnerable to an Arbitrary Code Execution attack

XStream is vulnerable to an Arbitrary Code Execution attack

XStream is vulnerable to an Arbitrary Code Execution attack

XStream is vulnerable to an Arbitrary Code Execution attack

XStream is vulnerable to an Arbitrary Code Execution attack

XStream is vulnerable to an Arbitrary Code Execution attack

XStream is vulnerable to an Arbitrary Code Execution attack

A Server-Side Forgery Request vulnerability in XStream via PriorityQueue unmarshaling

Heap-based Buffer Overflow in vim/vim

A flaw was found in the way Samba maps domain users to local users. An authenticated attacker could use this flaw to cause possible privilege escalation.

Heap-based Buffer Overflow in vim/vim

Heap-based Buffer Overflow in vim/vim

Stack-based Buffer Overflow in vim/vim

Heap-based Buffer Overflow in vim/vim

Stack-based Buffer Overflow in vim/vim

Out-of-bounds Read in vim/vim

Use After Free in vim/vim

Use After Free in vim/vim

An issue was discovered in the Bidirectional Algorithm in the Unicode Specification through 14.0. It permits the visual reordering of characters via control sequences, which can be used to craft source code that renders different logic than the logical ordering of tokens ingested by compilers and interpreters. Adversaries can leverage this to encode source code for compilers accepting Unicode such that targeted vulnerabilities are introduced invisibly to human reviewers. NOTE: the Unicode Consortium offers the following alternative approach to presenting this concern. An issue is noted in the nature of international text that can affect applications that implement support for The Unicode Standard and the Unicode Bidirectional Algorithm (all versions). Due to text display behavior when text includes left-to-right and right-to-left characters, the visual order of tokens may be different from their logical order. Additionally, control characters needed to fully support the requirements of bidirectional text can further obfuscate the logical order of tokens. Unless mitigated, an adversary could craft source code such that the ordering of tokens perceived by human reviewers does not match what will be processed by a compiler/interpreter/etc. The Unicode Consortium has documented this class of vulnerability in its document, Unicode Technical Report #36, Unicode Security Considerations. The Unicode Consortium also provides guidance on mitigations for this class of issues in Unicode Technical Standard #39, Unicode Security Mechanisms, and in Unicode Standard Annex #31, Unicode Identifier and Pattern Syntax. Also, the BIDI specification allows applications to tailor the implementation in ways that can mitigate misleading visual reordering in program text; see HL4 in Unicode Standard Annex #9, Unicode Bidirectional Algorithm.

Possible NULL dereference or SSRF in forward proxy configurations in Apache HTTP Server 2.4.51 and earlier

HTML Cleaner allows crafted and SVG embedded scripts to pass through

Use After Free in vim/vim

A DMA reentrancy issue was found in the NVM Express Controller (NVME) emulation in QEMU. This CVE is similar to CVE-2021-3750 and, just like it, when the reentrancy write triggers the reset function nvme_ctrl_reset(), data structs will be freed leading to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition or, potentially, executing arbitrary code within the context of the QEMU process on the host.

snapd could be made to bypass intended access restrictions through snap content interfaces and layout paths

A OS Command Injection vulnerability exists in Node.js versions <14.20.0, <16.20.0, <18.5.0 due to an insufficient IsAllowedHost check that can easily be bypassed because IsIPAddress does not properly check if an IP address is invalid before making DBS requests allowing rebinding attacks.