A Null pointer de-reference problem was found in idafree in lib/idr.c file when it calls the xasload function and returns a null value, assigning NULL to the bitmap variable.

Therefore, if (xaisvalue(bitmap)) will fail and jump to the else branch. However, in the else branch, the statement if (!testbit(bit, bitmap->bitmap)) references the member of bitmap, which triggers a null pointer dereference vulnerability.

Reference: https://github.com/torvalds/linux/commit/af73483f4e8b6f5c68c9aa63257bdd929a9c194a

A flaw was identified in the X.Org X server’s X Keyboard (Xkb) extension where improper bounds checking in the XkbSetCompatMap() function can cause an unsigned short overflow. If an attacker sends specially crafted input data, the value calculation may overflow, leading to memory corruption or a crash.

A flaw was discovered in the X.Org X server’s X Keyboard (Xkb) extension when handling client resource cleanup. The software frees certain data structures without properly detaching related resources, leading to a use-after-free condition. This can cause memory corruption or a crash when affected clients disconnect.

A vulnerability was found in OpenSC where PKCS#1 encryption padding removal is not implemented as side-channel resistant. This issue may result in the potential leak of private data.

A flaw was found in rsync which could be triggered when rsync compares file checksums. This flaw allows an attacker to manipulate the checksum length (s2length) to cause a comparison between a checksum and uninitialized memory and leak one byte of uninitialized stack data at a time.

A symlink traversal vulnerability in the containers/storage library can cause Podman, Buildah, and CRI-O to hang and potentially be DoSed via OOM kill when running a malicious image using an automatically assigned user namespace (--userns=auto in Podman and Buildah). The containers/storage library will read /etc/passwd inside the container, but does not properly validate if that file is a symlink, which can be used to cause the library to read an arbitrary file on the host. This file is only read, and if it does not properly parse as a copy of /etc/passwd it will cause an error (there is a small risk of information disclosure via the error message here as elements of the file that failed to parse can be included, but this is only as the user running Podman/Buildah/CRI-O so it wouldn't be a file they did not already have access to). The report here discovered that you can symlink /etc/passwd in the container to a FIFO on the host, causing a hang as the file cannot be completely read (or an OOM condition if the FIFO is continuously written to, which was then ready by Podman). This hang could occur in a critical section in the c/storage library, blocking other processes from creating containers, but could be easily solved via a SIGKILL of the affected process. The ability to potentially crash the CRI-O service via OOM kill could be more relevant, though the attacker would have to know the path of a FIFO that is regularly being written to on the host in order to do this.

Fragnesia is a universal Linux local privilege escalation exploit, discovered by William Bowling with the V12 team. Fragnesia is a member of the Dirty Frag vulnerability class. This is a separate bug in the ESP/XFRM from dirtyfrag which has received its own patch. However, it is in the same surface and the mitigation is the same as for dirtyfrag.

It abuses a logic bug in the Linux XFRM ESP-in-TCP subsystem to achieve arbitrary byte writes into the kernel page cache of read-only files, without requiring any race condition.

The technique extends the page-cache write bug class that includes Dirty Pipe: when a TCP socket transitions to espintcp ULP mode after data has already been spliced from a file into the receive queue, the kernel processes the queued file pages as ESP ciphertext. The AES-GCM keystream byte at counter block position 2, byte 0 is XORed directly into the cached file page. By selecting the IV nonce to produce a desired keystream byte, any target byte in the file can be set to any value — one byte per trigger invocation.

The exploit builds a 256-entry lookup table mapping each possible keystream byte to its corresponding nonce, then iterates over a payload, firing the splice/ULP race for each byte that needs changing. It writes a small position-independent ELF stub (setresuid/setresgid/execve /bin/sh) over the first 192 bytes of /usr/bin/su in the page cache, then calls execve("/usr/bin/su") to obtain a root shell. The page cache modification is not backed to disk; the on-disk binary is untouched.

A flaw was found in libxml2's xmlBuildQName function, where integer overflows in buffer size calculations can lead to a stack-based buffer overflow. This issue can result in memory corruption or a denial of service when processing crafted input.

A flaw was found in libsoup. The package is vulnerable to a heap buffer over-read when sniffing content via the skipinsightwhitespace() function. Libsoup clients may read one byte out-of-bounds in response to a crafted HTTP response by an HTTP server.

An Out-Of-Bounds Read vulnerability in smbCalcSize in fs/smb/client/netmisc.c in the Linux Kernel. This flaw could allow a local attacker to crash the system or leak internal kernel information.

Refer; https://bugzilla.kernel.org/showbug.cgi?id=218218

[1] Retrieve WordCount and add offset2 to the data part of smb [2] Retrieve a 16-byte value from the calculated pointer

c unsigned int smbCalcSize(void buf) { struct smbhdr ptr = buf; return (sizeof(struct smbhdr) + (2 ptr->WordCount) + 2 / size of the bcc field / + getbcc(ptr)); } ... static inline u16 getbcc(struct smbhdr hdr) { le16 bcptr = (le16 )BCC(hdr);

return getunalignedle16(bcptr);//[2] } ... static inline void BCC(struct smbhdr smb) { return (void )smb + sizeof(smb) + 2 smb->WordCount; //[1] }

[2] cifsdemultiplexthread → standardreceive3 → cifshandlestandard → checkSMB → smbCalcSize

c int checkSMB(char buf, unsigned int totalread, struct TCPServerInfo server) { struct smbhdr smb = (struct smbhdr )buf; u32 rfclen = be32tocpu(smb->smbbuflength); u32 clclen; / calculated length / cifsdbg(FYI, "checkSMB Length: 0x%x, smbbuflength: 0x%x\n", totalread, rfclen);

/ is this frame too small to even get to a BCC? / if (totalread < 2 + sizeof(struct smbhdr)) { ... }

/ otherwise, there is enough to get to the BCC / if (checksmbhdr(smb)) return -EIO; clclen = smbCalcSize(smb);

A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate within a set time period.

A flaw was found in the gdk-pixbuf library. This heap-based buffer overflow vulnerability occurs in the JPEG image loader due to improper validation of color component counts when processing a specially crafted JPEG image. A remote attacker can exploit this flaw without user interaction, for example, via thumbnail generation. Successful exploitation leads to application crashes and denial of service (DoS) conditions.

A vulnerability was found in Buildah. Cache mounts do not properly validate that user-specified paths for the cache are within our cache directory, allowing a RUN instruction in a Container file to mount an arbitrary directory from the host (read/write) into the container as long as those files can be accessed by the user running Buildah.

A flaw was found in the libtiff library. A remote attacker could exploit a signed integer overflow vulnerability in the putcontig8bitYCbCr44tile function by providing a specially crafted TIFF file. This flaw can lead to an out-of-bounds heap write due to incorrect memory pointer calculations, potentially causing a denial of service (application crash) or arbitrary code execution.

A flaw was found in Yelp. The Gnome user help application allows the help document to execute arbitrary scripts. This vulnerability allows malicious users to input help documents, which may exfiltrate user files to an external environment.

Last updated 30 August 2024

A vulnerability was found in Unbound due to incorrect default permissions, allowing any process outside the unbound group to modify the unbound runtime configuration. If a process can connect over localhost to port 8953, it can alter the configuration of unbound.service. This flaw allows an unprivileged attacker to manipulate a running instance, potentially altering forwarders, allowing them to track all queries forwarded by the local resolver, and, in some cases, disrupting resolving altogether.

https://github.com/net-snmp/net-snmp/blob/v5.9.2/CHANGES

CVE-2022-24808 A malformed OID in a SET request to NET-SNMP-AGENT-MIB::nsLogTable can cause a NULL pointer dereference

From https://github.com/net-snmp/net-snmp/blob/v5.9.2/CHANGES CVE-2022-24806 Improper Input Validation when SETing malformed OIDs in master agent and subagent simultaneously

CVE-2022-24807 A malformed OID in a SET request to SNMP-VIEW-BASED-ACM-MIB::vacmAccessTable can cause an out-of-bounds memory access. https://github.com/net-snmp/net-snmp/blob/v5.9.2/CHANGES

https://github.com/net-snmp/net-snmp/blob/v5.9.2/CHANGES CVE-2022-24809 A malformed OID in a GET-NEXT to the nsVacmAccessTable can cause a NULL pointer dereference.

+5.9.2: + security: + - These two CVEs can be exploited by a user with read-only credentials: + - CVE-2022-24805 A buffer overflow in the handling of the INDEX of + NET-SNMP-VACM-MIB can cause an out-of-bounds memory access. + - CVE-2022-24809 A malformed OID in a GET-NEXT to the nsVacmAccessTable + can cause a NULL pointer dereference. + - These CVEs can be exploited by a user with read-write credentials: + - CVE-2022-24806 Improper Input Validation when SETing malformed + OIDs in master agent and subagent simultaneously + - CVE-2022-24807 A malformed OID in a SET request to + SNMP-VIEW-BASED-ACM-MIB::vacmAccessTable can cause an + out-of-bounds memory access. + - CVE-2022-24808 A malformed OID in a SET request to + NET-SNMP-AGENT-MIB::nsLogTable can cause a NULL pointer dereference + - CVE-2022-24810 A malformed OID in a SET to the nsVacmAccessTable + can cause a NULL pointer dereference. + - To avoid these flaws, use strong SNMPv3 credentials and do not share them. + If you must use SNMPv1 or SNMPv2c, use a complex community string + and enhance the protection by restricting access to a given IP address range. + - Thanks are due to Yu Zhang of VARAS@IIE and Nanyu Zhong of VARAS@IIE for + reporting the following CVEs that have been fixed in this release, and + to Arista Networks for providing fixes.

crypto: algifaead - Revert to operating out-of-place

Accessibility. A logic issue was addressed with improved checks.

jq is a command-line JSON processor. In commits before 2f09060afab23fe9390cce7cb860b10416e1bf5f, the jvparsesized() API in libjq accepts a counted buffer with an explicit length parameter, but its error-handling path formats the input buffer using %s in jvstringfmt(), which reads until a NUL terminator is found rather than respecting the caller-supplied length. This means that when malformed JSON is passed in a non-NUL-terminated buffer, the error construction logic performs an out-of-bounds read past the end of the buffer. The vulnerability is reachable by any libjq consumer calling jvparsesized() with untrusted input, and depending on memory layout, can result in memory disclosure or process termination. The issue has been patched in commit 2f09060afab23fe9390cce7cb860b10416e1bf5f.

A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBCTUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBCTUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges.

A flaw in Node.js HTTP request handling causes an uncaught TypeError when a request is received with a header named proto and the application accesses req.headersDistinct.

When this occurs, dest["proto"] resolves to Object.prototype rather than undefined, causing .push() to be called on a non-array. This exception is thrown synchronously inside a property getter and cannot be intercepted by error event listeners, meaning it cannot be handled without wrapping every req.headersDistinct access in a try/catch.

This vulnerability affects all Node.js HTTP servers on 20.x, 22.x, 24.x, and v25.x

A crafted regular expression when compiled by perl 5.30.0 through 5.38.0 can cause a one attacker controlled byte buffer overflow in a heap allocated buffer.

A race condition flaw was found in sssd where the GPO policy is not consistently applied for authenticated users. This may lead to improper authorization issues, granting or denying access to resources inappropriately.