| CVE |
Vendors |
Products |
Updated |
CVSS v3.1 |
| Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network. |
| Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network. |
| Integer underflow (wrap or wraparound) in Windows DHCP Server allows an unauthorized attacker to disclose information over an adjacent network. |
| A maliciously crafted input, when processed by the Autodesk Installer IPC frame parser, may trigger improper validation of an input-specified position or offset, resulting in an out-of-range substring operation. A malicious actor may leverage this vulnerability to cause the NT AUTHORITY\SYSTEM service to terminate unexpectedly, resulting in a denial-of-service condition. |
| Heap-based buffer overflow in Windows iSCSI Target Service allows an unauthorized attacker to execute code over a network. |
| Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally. |
| In the Linux kernel, the following vulnerability has been resolved:
wifi: iwlwifi: mld: validate sta_mask before ffs() in BA session handlers
Three BA session handlers use ffs(ba_data->sta_mask) - 1 to derive a
station ID without checking that sta_mask is non-zero. When sta_mask is
zero, ffs() returns 0 and the subtraction wraps to 0xFFFFFFFF, causing
an out-of-bounds access on fw_id_to_link_sta[].
Add WARN_ON_ONCE(!ba_data->sta_mask) guards before each ffs() call,
consistent with the existing check in iwl_mld_ampdu_rx_start(). |
| A flaw was found in OpenSSH. This vulnerability, a heap out-of-bounds read, occurs during the cleanup of GSSAPI (Generic Security Service Application Programming Interface) indicators when a trailing NULL termination is missing in the auth-indicators array. A remote attacker, under specific configurations involving GSSAPI authentication and a Kerberos environment, could exploit this to cause the SSH authentication path to crash or abort. This leads to a denial of service (DoS), impacting the availability of the SSH service. |
| In the Linux kernel, the following vulnerability has been resolved:
ipv4: raw: reject IP_HDRINCL packets with ihl < 5
raw_send_hdrinc() validates that the caller-supplied IPv4 header
fits within the message length:
iphlen = iph->ihl * 4;
err = -EINVAL;
if (iphlen > length)
goto error_free;
if (iphlen >= sizeof(*iph)) {
/* fix up saddr, tot_len, id, csum, transport_header */
}
It does not, however, reject ihl < 5. For such a packet the
"if (iphlen >= sizeof(*iph))" branch is skipped, leaving the
crafted iphdr untouched, but the packet is still handed to
__ip_local_out() and onward. Downstream consumers that read
iph->ihl assume a sane value: net/ipv4/ah4.c:ah_output() in
particular subtracts sizeof(struct iphdr) from top_iph->ihl * 4
and passes the (signed-int-negative, then cast to size_t)
result to memcpy(), producing an OOB access of length close to
SIZE_MAX and a host kernel panic.
An IPv4 header with ihl < 5 is malformed by definition (RFC 791:
"Internet Header Length is the length of the internet header in
32 bit words ... Note that the minimum value for a correct header
is 5."). The kernel should not be willing to inject such a
packet into its own output path.
Reject "iphlen < sizeof(*iph)" alongside the existing
"iphlen > length" check. This matches the principle that locally
constructed packets that re-enter the IP stack must pass the same
basic sanity tests that a foreign packet would be subjected to.
Once this lands, the "if (iphlen >= sizeof(*iph))" wrapper around
the fixup branch becomes redundant; left in place to keep the
patch minimal and backport-friendly. A follow-up can unwrap it.
Note that commit 86f4c90a1c5c ("ipv4, ipv6: ensure raw socket
message is big enough to hold an IP header") ensures the message
buffer is large enough to hold an iphdr, but does not constrain
the self-reported iph->ihl.
Reachability: the malformed packet source is any caller with
CAP_NET_RAW, including an unprivileged process in a user+net
namespace on a kernel with CONFIG_USER_NS=y. The reproduced AH
crash also requires a matching xfrm AH policy on the outgoing
route; a container granted CAP_NET_ADMIN can install that state
and policy in its netns. Loopback bypasses xfrm_output, so the
trigger uses a real netdev.
Reproduced on UML + KASAN: kernel-mode fault at addr 0x0 with
memcpy_orig at the crash site. Same shape reproduces inside a
rootless Docker container with --cap-add NET_ADMIN on a stock
distro kernel. |
| In the Linux kernel, the following vulnerability has been resolved:
RDMA/siw: Reject MPA FPDU length underflow before signed receive math
A malicious connected siw peer can send an iWARP FPDU whose MPA length
field (c_hdr->mpa_len, 16 bit big-endian, peer-controlled) is smaller
than the fixed DDP/RDMAP header for the announced opcode. Soft-iWARP
parses the full header in siw_get_hdr() based on iwarp_pktinfo[opcode]
.hdr_len, but never compares mpa_len against that header length.
siw_tcp_rx_data() then derives
srx->fpdu_part_rem = be16_to_cpu(mpa_len) - fpdu_part_rcvd
+ MPA_HDR_SIZE;
where fpdu_part_rcvd equals iwarp_pktinfo[opcode].hdr_len at this
point. For a tagged WRITE (hdr_len 16, MPA_HDR_SIZE 2) the smallest
on-wire mpa_len of 0 yields fpdu_part_rem = -14, and any mpa_len below
hdr_len - MPA_HDR_SIZE underflows to a negative int.
The signed value then flows into siw_proc_write()/siw_proc_rresp() as
bytes = min(srx->fpdu_part_rem, srx->skb_new);
is handed to siw_check_mem() as an int len (whose interval check
addr + len > mem->va + mem->len is satisfied for a valid base when
len is negative), and reaches siw_rx_data() -> siw_rx_kva() /
siw_rx_umem() -> skb_copy_bits() as a signed copy length. The header
copy branch in skb_copy_bits() promotes that to size_t, producing a
multi-gigabyte read.
KASAN under a KUnit harness that drives the real kernel TCP receive
path -- a loopback AF_INET socketpair, the malformed FPDU written via
kernel_sendmsg, sk_data_ready firing in softirq, tcp_read_sock
dispatching to siw_tcp_rx_data -- reports:
BUG: KASAN: use-after-free in skb_copy_bits+0x284/0x480
Read of size 4294967295 at addr ffff888...
Call Trace:
skb_copy_bits
siw_rx_kva
siw_rx_data
siw_check_mem
siw_proc_write
siw_tcp_rx_data
__tcp_read_sock
siw_qp_llp_data_ready
tcp_data_ready
tcp_data_queue
Add the missing invariant at the earliest point where the peer header
is fully assembled. iwarp_pktinfo[*].hdr_len - MPA_HDR_SIZE is exactly
the value the siw transmitter uses as the minimum mpa_len for each
opcode (drivers/infiniband/sw/siw/siw_qp.c:33), so this matches the
protocol contract. Out-of-range FPDUs terminate the connection with
TERM_ERROR_LAYER_LLP / LLP_ETYPE_MPA / LLP_ECODE_FPDU_START -- which
is RFC 5044 Section 8 error code 3 ("Marker and ULPDU Length fields
do not agree on the start of an FPDU"), the correct framing-error
class for this inconsistency. |
| AI_ONLY_REPORT
package: iscsi-initiator-utils-6.2.1.11-0.git4b3e853.el10
------
Summary: Stack Buffer Overflow in idbm_recinfo_config via Malicious iSCSI
Target: a crafted SendTargets TargetName can inject an extra configuration
line into a persisted node record and later cause a stack buffer overflow
when that record is reparsed.
Requirements to exploit: An attacker must control an iSCSI target or tamper
with SendTargets discovery traffic, return a crafted `TargetName`
containing a newline and oversized injected key or value data, have the
victim run persistent discovery, and then trigger a later node-record read
such as update or login.
Component affected: `iscsi-initiator-utils`;
`usr/idbm.c:idbm_recinfo_config`, with attacker-controlled input reaching
it through SendTargets handling in `usr/discovery.c` and later record
serialization in `usr/idbm.c`.
Version affected: `iscsi-initiator-utils-6.2.1.11-0.git4b3e853.el10`
Patch available: no released package fix established; proposed patch
included below
Version fixed: unknown
Upstream coordination: Not notified.
CVSS: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H - 7.5 (HIGH)
AV:N - The attacker can supply the malicious data over the network in a
SendTargets discovery response.
AC:L - The target-name length cap still leaves enough room for a newline
plus an overlong injected key; no race or unusual memory state is required.
PR:N - No prior access to the initiator is required.
UI:R - The victim must run SendTargets discovery that persists records
and later read the saved record.
S:U - The impact remains within the initiator-side component that parses
and stores its own database records.
C:L - Memory corruption could expose limited process memory, but
confidentiality impact is not demonstrated.
I:L - Process memory corruption can affect integrity, but reliable code
execution is not established.
A:H - The clearest supported outcome is a crash during config parsing.
Impact: Moderate. This issue could otherwise resemble an Important remote
denial-of-service flaw, but Red Hat rates such issues lower when they are
less easily exploited or depend on narrower conditions. Here, exploitation
requires a multi-step SendTargets discovery workflow, persistence of the
discovered record, and a later reread of that record. The strongest
supported outcome is denial of service or other memory corruption, while
code execution remains unproven.
Embargo: no
Reason: The available evidence supports a multi-step,
configuration-dependent denial-of-service or memory-corruption issue rather
than a demonstrated remote code execution flaw, so embargoed handling does
not appear necessary.
Acknowledgement: Aisle Research
Vulnerability Details: `idbm_recinfo_config()` copies config keys and
values into fixed stack buffers without bounds checks:
```c
while (*nl && !isspace(c = *nl) && *nl != '=') {
*(name+i) = *nl; i+; nl+;
}
...
while (*nl) {
*(value+i) = *nl; i+; nl+;
}
```
In this code path, `name` and `value` are 128-byte and 256-byte stack
buffers, so an injected key longer than 128 bytes or a value longer than
256 bytes can corrupt stack memory.
During SendTargets discovery, attacker-controlled `TargetName` text is
copied into the node record and later written back to disk without
control-character filtering:
```c
strlcpy(rec->name, targetname, TARGET_NAME_MAXLEN);
...
if (strlen(info[i].value))
fprintf(f, "%s = %s\n", info[i].name, info[i].value);
```
`process_sendtargets_response()` treats `TargetName=` records as discovery
input, and `add_target_record()` accepts names up to `TARGET_NAME_MAXLEN`.
That limit is 255 bytes in this package, which is still enough to carry a
newline plus a key longer than the 128-byte `name` buffer. A `TargetName`
such as `iqn.test\nAAAA...=B` can therefore split the serialized
`node.name` entry into two lines and inject a second config line.
Persistent SendTargets discovery stores discovered node records unless
nonpersistent mode is used, and later discovery update/login or explicit
node operations reread those saved records. The 2048-byte line buffer in
`idbm_recinfo_config()` does not prevent this because the injected line
only needs to exceed 128 bytes for the key or 256 bytes for the value.
Based on the available evidence, the supported impact is a crash or other
memory corruption during reparsing. Reliable code execution is plausible
but not established.
Steps to reproduce:
1. Run a malicious SendTargets responder, or intercept discovery traffic,
and return a `TargetName` value containing a newline and an oversized
injected key, for example `TargetName=iqn.test\nAAAAAAAA...(>=129 chars)=B`.
2. Run SendTargets discovery in its normal persistent mode. The default
`iscsiadm -m discovery ...` workflow persists records unless nonpersistent
mode is selected.
3. Inspect the saved node record and confirm that it contains both the
expected `node.name = ...` line and an injected `AAAA...=B` line.
4. Trigger any operation that rereads the node record, such as discovery
update, node update, or login.
5. Observe a crash during parsing. With instrumentation enabled, the
overflow should be reported in `idbm_recinfo_config()`.
Mitigation: Until a fix is available, avoid persistent SendTargets
discovery against untrusted or interceptable networks. Where operationally
acceptable, use nonpersistent discovery, and remove node records created
from untrusted discovery results before later update or login operations.
Proposed Fix: The fix should address both parts of the chain: bound the key
and value copies in `idbm_recinfo_config()` and reject control characters
in `TargetName` before persistence.
```diff
diff --git a/usr/idbm.c b/usr/idbm.c
@@ void idbm_recinfo_config(recinfo_t *info, FILE *f)
while (*nl && !isspace(c = *nl) && *nl != '=') {
*(name+i) = *nl; i+; nl+;
}
+ while (*nl && !isspace(c = *nl) && *nl != '=') {
+ if (i >= NAME_MAXVAL - 1) {
+ log_warning("Config file line %d key too long",
line_number);
+ break;
+ }
+ name[i++] = *nl++;
+ }
@@
while (*nl) {
*(value+i) = *nl; i+; nl+;
}
+ while (*nl) {
+ if (i >= VALUE_MAXVAL - 1) {
+ log_warning("Config file line %d value too long",
line_number);
+ break;
+ }
+ value[i++] = *nl++;
+ }
diff --git a/usr/discovery.c b/usr/discovery.c
@@ static int add_target_record(char *name, char *end, discovery_rec_t
*drec,
while ((nul < end) && (*nul != '\0'))
nul++;
+ for (char *p = name; p < nul; p++) {
+ if (*p == '\n' || *p == '\r' || (unsigned char)*p < 0x20) {
+ log_error("TargetName contains control characters,
rejecting");
+ return 0;
+ }
+ }
```
------
This report was generated using AI technology. Always review AI-generated
content prior to use |
| Stack-based buffer overflow in Windows DNS allows an unauthorized attacker to execute code over a network. |
| A heap buffer overflow vulnerability was found in libaom, the reference AV1 codec implementation. A flaw in the AV1 encoder's Look-Ahead Processing (LAP) mode causes the first-pass stats ring buffer wrap-around guard to be bypassed when g_lag_in_frames is set to 1 or higher. This results in a 232-byte out-of-bounds write on every encoded frame after the second, corrupting adjacent heap objects. An attacker who can influence encoder configuration in a transcoding service or WebRTC session could exploit this to cause a denial of service (process crash) or potentially achieve code execution. |
| A flaw was found in Undertow. A remote attacker can cause Out of Memory on websockets endpoint without authentication on any @ServerEndpoint class that has any @OnMessage method. This allows an attacker to cause Denial of Service attack without authentication and using only a standard WebSocket handshake. |
| Integer overflow or wraparound in .NET allows an unauthorized attacker to elevate privileges locally. |
| In the Linux kernel, the following vulnerability has been resolved:
exfat: bound uniname advance in exfat_find_dir_entry()
In exfat_find_dir_entry(), each TYPE_EXTEND (file name) entry advances the
output pointer by a fixed amount while the loop guard only tracks the
accumulated name length:
if (++order == 2)
uniname = p_uniname->name;
else
uniname += EXFAT_FILE_NAME_LEN;
len = exfat_extract_uni_name(ep, entry_uniname);
name_len += len;
unichar = *(uniname+len);
*(uniname+len) = 0x0;
uniname grows by EXFAT_FILE_NAME_LEN (15) per name entry, but name_len
grows only by the actual extracted length, which is shorter when a name
fragment contains an early NUL. The only guard is
`name_len >= MAX_NAME_LENGTH`, so a crafted directory with many short
name fragments lets uniname run far past the
p_uniname->name[MAX_NAME_LENGTH + 3] buffer while name_len stays small,
causing an out-of-bounds read and write at *(uniname+len).
The sibling extractor exfat_get_uniname_from_ext_entry() already stops
on a short fragment (the lockstep `len != EXFAT_FILE_NAME_LEN` guard
added in commit d42334578eba ("exfat: check if filename entries exceeds
max filename length")); exfat_find_dir_entry() never got the
equivalent. Track the per-entry write offset as a count and reject a
fragment once the offset, or the offset plus the extracted length, would
exceed MAX_NAME_LENGTH, before forming the output pointer. |
| Heap-based buffer overflow in Windows Telephony Service allows an authorized attacker to elevate privileges locally. |
| Heap-based buffer overflow in Windows Message Queuing allows an authorized attacker to elevate privileges locally. |
| Heap-based buffer overflow in Windows DNS allows an authorized attacker to elevate privileges locally. |
| Buffer over-read in Windows Network File System allows an unauthorized attacker to deny service over a network. |
