Search criteria
328 vulnerabilities by openbsd
CVE-2025-61985 (GCVE-0-2025-61985)
Vulnerability from cvelistv5 – Published: 2025-10-06 00:00 – Updated: 2025-10-06 18:34
VLAI?
Summary
ssh in OpenSSH before 10.1 allows the '\0' character in an ssh:// URI, potentially leading to code execution when a ProxyCommand is used.
Severity ?
CWE
- CWE-158 - Improper Neutralization of Null Byte or NUL Character
Assigner
References
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CVE-2025-61984 (GCVE-0-2025-61984)
Vulnerability from cvelistv5 – Published: 2025-10-06 00:00 – Updated: 2025-11-11 14:50
VLAI?
Summary
ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)
Severity ?
CWE
- CWE-159 - Improper Handling of Invalid Use of Special Elements
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References
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CVE-2025-32728 (GCVE-0-2025-32728)
Vulnerability from cvelistv5 – Published: 2025-04-10 00:00 – Updated: 2025-05-08 13:11
VLAI?
Summary
In sshd in OpenSSH before 10.0, the DisableForwarding directive does not adhere to the documentation stating that it disables X11 and agent forwarding.
Severity ?
4.3 (Medium)
CWE
- CWE-440 - Expected Behavior Violation
Assigner
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CVE-2025-30334 (GCVE-0-2025-30334)
Vulnerability from cvelistv5 – Published: 2025-03-20 20:39 – Updated: 2025-03-21 15:22
VLAI?
Summary
In OpenBSD 7.6 before errata 006 and OpenBSD 7.5 before errata 015, traffic sent over wg(4) could result in kernel crash.
Severity ?
CWE
- CWE-131 - Incorrect Calculation of Buffer Size
Assigner
References
Impacted products
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CVE-2025-26466 (GCVE-0-2025-26466)
Vulnerability from cvelistv5 – Published: 2025-02-28 21:25 – Updated: 2025-11-06 23:33
VLAI?
Summary
A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such packages, leading to an uncontrolled increase in memory consumption on the server side. Consequently, the server may become unavailable, resulting in a denial of service attack.
Severity ?
5.9 (Medium)
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
References
| URL | Tags | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||
Impacted products
| Vendor | Product | Version | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Affected:
9.5p1 , ≤ 9.9p1
(custom)
|
||||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||
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CVE-2025-26465 (GCVE-0-2025-26465)
Vulnerability from cvelistv5 – Published: 2025-02-18 18:27 – Updated: 2025-11-06 23:33
VLAI?
Summary
A vulnerability was found in OpenSSH when the VerifyHostKeyDNS option is enabled. A machine-in-the-middle attack can be performed by a malicious machine impersonating a legit server. This issue occurs due to how OpenSSH mishandles error codes in specific conditions when verifying the host key. For an attack to be considered successful, the attacker needs to manage to exhaust the client's memory resource first, turning the attack complexity high.
Severity ?
6.8 (Medium)
CWE
- CWE-390 - Detection of Error Condition Without Action
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | ||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Affected:
6.8p1 , ≤ 9.9p1
(custom)
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||
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CVE-2024-11149 (GCVE-0-2024-11149)
Vulnerability from cvelistv5 – Published: 2024-12-06 01:56 – Updated: 2024-12-06 16:41
VLAI?
Summary
In OpenBSD 7.4 before errata 014, vmm(4) did not restore GDTR limits properly on Intel (VMX) CPUs.
Severity ?
Assigner
References
Impacted products
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CVE-2024-10933 (GCVE-0-2024-10933)
Vulnerability from cvelistv5 – Published: 2024-12-05 20:06 – Updated: 2024-12-05 20:40
VLAI?
Summary
In OpenBSD 7.5 before errata 009 and OpenBSD 7.4 before errata 022, exclude any '/' in readdir name validation to avoid unexpected directory traversal on untrusted file systems.
Severity ?
CWE
- CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Assigner
References
Impacted products
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CVE-2024-11148 (GCVE-0-2024-11148)
Vulnerability from cvelistv5 – Published: 2024-12-05 19:50 – Updated: 2024-12-06 18:58
VLAI?
Summary
In OpenBSD 7.4 before errata 006 and OpenBSD 7.3 before errata 020, httpd(8) is vulnerable to a NULL dereference when handling a malformed fastcgi request.
Severity ?
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
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CVE-2024-10934 (GCVE-0-2024-10934)
Vulnerability from cvelistv5 – Published: 2024-11-15 19:20 – Updated: 2025-10-02 14:09
VLAI?
Summary
In OpenBSD 7.5 before errata 008 and OpenBSD 7.4 before errata 021,
avoid possible mbuf double free in NFS client and server implementation, do not use uninitialized variable in error handling of NFS server.
Severity ?
9.8 (Critical)
Assigner
References
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CVE-2024-6387 (GCVE-0-2024-6387)
Vulnerability from cvelistv5 – Published: 2024-07-01 12:37 – Updated: 2025-11-11 16:12
VLAI?
Summary
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.
Severity ?
8.1 (High)
CWE
- CWE-364 - Signal Handler Race Condition
Assigner
References
| URL | Tags | |||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||||||||||||||
Impacted products
| Vendor | Product | Version | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Affected:
8.5p1 , ≤ 9.7p1
(custom)
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|
|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Credits
Red Hat would like to thank Qualys Threat Research Unit (TRU) (Qualys) for reporting this issue.
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CVE-2021-35000 (GCVE-0-2021-35000)
Vulnerability from cvelistv5 – Published: 2024-05-07 22:54 – Updated: 2024-09-18 18:27
VLAI?
Summary
OpenBSD Kernel Multicast Routing Uninitialized Memory Information Disclosure Vulnerability. This vulnerability allows local attackers to disclose sensitive information on affected installations of OpenBSD Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the implementation of multicast routing. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the kernel.
. Was ZDI-CAN-16112.
Severity ?
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
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CVE-2021-34999 (GCVE-0-2021-34999)
Vulnerability from cvelistv5 – Published: 2024-05-07 22:54 – Updated: 2024-09-18 18:19
VLAI?
Summary
OpenBSD Kernel Multicast Routing Uninitialized Memory Information Disclosure Vulnerability. This vulnerability allows local attackers to disclose sensitive information on affected installations of OpenBSD Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the implementation of multicast routing. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the kernel.
. Was ZDI-CAN-14540.
Severity ?
CWE
- CWE-908 - Use of Uninitialized Resource
Assigner
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CVE-2024-29937 (GCVE-0-2024-29937)
Vulnerability from cvelistv5 – Published: 2024-03-21 00:00 – Updated: 2025-03-13 15:58
VLAI?
Summary
NFS in a BSD derived codebase, as used in OpenBSD through 7.4 and FreeBSD through 14.0-RELEASE, allows remote attackers to execute arbitrary code via a bug that is unrelated to memory corruption.
Severity ?
9.8 (Critical)
CWE
- n/a
Assigner
References
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CVE-2023-52558 (GCVE-0-2023-52558)
Vulnerability from cvelistv5 – Published: 2024-03-01 16:33 – Updated: 2024-11-19 21:42
VLAI?
Summary
In OpenBSD 7.4 before errata 002 and OpenBSD 7.3 before errata 019, a network buffer that had to be split at certain length that could crash the kernel after receiving specially crafted escape sequences.
Severity ?
7.5 (High)
CWE
- CWE-131 - Incorrect Calculation of Buffer Size
Assigner
References
Impacted products
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CVE-2023-52557 (GCVE-0-2023-52557)
Vulnerability from cvelistv5 – Published: 2024-03-01 16:14 – Updated: 2024-08-02 23:03
VLAI?
Summary
In OpenBSD 7.3 before errata 016, npppd(8) could crash by a l2tp message which has an AVP (Attribute-Value Pair) with wrong length.
Severity ?
7.5 (High)
CWE
- CWE-131 - Incorrect Calculation of Buffer Size
Assigner
References
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CVE-2023-52556 (GCVE-0-2023-52556)
Vulnerability from cvelistv5 – Published: 2024-03-01 16:08 – Updated: 2024-11-14 19:47
VLAI?
Summary
In OpenBSD 7.4 before errata 009, a race condition between pf(4)'s processing of packets and expiration of packet states may cause a kernel panic.
Severity ?
6.2 (Medium)
CWE
- CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Assigner
References
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CVE-2023-51767 (GCVE-0-2023-51767)
Vulnerability from cvelistv5 – Published: 2023-12-24 00:00 – Updated: 2025-11-18 22:03
VLAI?
Summary
OpenSSH through 10.0, when common types of DRAM are used, might allow row hammer attacks (for authentication bypass) because the integer value of authenticated in mm_answer_authpassword does not resist flips of a single bit. NOTE: this is applicable to a certain threat model of attacker-victim co-location in which the attacker has user privileges. NOTE: this is disputed by the Supplier, who states "we do not consider it to be the application's responsibility to defend against platform architectural weaknesses."
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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CVE-2023-51385 (GCVE-0-2023-51385)
Vulnerability from cvelistv5 – Published: 2023-12-18 00:00 – Updated: 2025-11-04 21:08
VLAI?
Summary
In ssh in OpenSSH before 9.6, OS command injection might occur if a user name or host name has shell metacharacters, and this name is referenced by an expansion token in certain situations. For example, an untrusted Git repository can have a submodule with shell metacharacters in a user name or host name.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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CVE-2023-48795 (GCVE-0-2023-48795)
Vulnerability from cvelistv5 – Published: 2023-12-18 00:00 – Updated: 2025-11-04 22:05
VLAI?
Summary
The SSH transport protocol with certain OpenSSH extensions, found in OpenSSH before 9.6 and other products, allows remote attackers to bypass integrity checks such that some packets are omitted (from the extension negotiation message), and a client and server may consequently end up with a connection for which some security features have been downgraded or disabled, aka a Terrapin attack. This occurs because the SSH Binary Packet Protocol (BPP), implemented by these extensions, mishandles the handshake phase and mishandles use of sequence numbers. For example, there is an effective attack against SSH's use of ChaCha20-Poly1305 (and CBC with Encrypt-then-MAC). The bypass occurs in chacha20-poly1305@openssh.com and (if CBC is used) the -etm@openssh.com MAC algorithms. This also affects Maverick Synergy Java SSH API before 3.1.0-SNAPSHOT, Dropbear through 2022.83, Ssh before 5.1.1 in Erlang/OTP, PuTTY before 0.80, AsyncSSH before 2.14.2, golang.org/x/crypto before 0.17.0, libssh before 0.10.6, libssh2 through 1.11.0, Thorn Tech SFTP Gateway before 3.4.6, Tera Term before 5.1, Paramiko before 3.4.0, jsch before 0.2.15, SFTPGo before 2.5.6, Netgate pfSense Plus through 23.09.1, Netgate pfSense CE through 2.7.2, HPN-SSH through 18.2.0, ProFTPD before 1.3.8b (and before 1.3.9rc2), ORYX CycloneSSH before 2.3.4, NetSarang XShell 7 before Build 0144, CrushFTP before 10.6.0, ConnectBot SSH library before 2.2.22, Apache MINA sshd through 2.11.0, sshj through 0.37.0, TinySSH through 20230101, trilead-ssh2 6401, LANCOM LCOS and LANconfig, FileZilla before 3.66.4, Nova before 11.8, PKIX-SSH before 14.4, SecureCRT before 9.4.3, Transmit5 before 5.10.4, Win32-OpenSSH before 9.5.0.0p1-Beta, WinSCP before 6.2.2, Bitvise SSH Server before 9.32, Bitvise SSH Client before 9.33, KiTTY through 0.76.1.13, the net-ssh gem 7.2.0 for Ruby, the mscdex ssh2 module before 1.15.0 for Node.js, the thrussh library before 0.35.1 for Rust, and the Russh crate before 0.40.2 for Rust.
Severity ?
5.9 (Medium)
CWE
- n/a
Assigner
References
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"url": "https://www.openssh.com/openbsd.html"
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"url": "https://groups.google.com/g/golang-announce/c/-n5WqVC18LQ"
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{
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{
"url": "https://github.com/ronf/asyncssh/tags"
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"url": "https://www.reddit.com/r/sysadmin/comments/18idv52/cve202348795_why_is_this_cve_still_undisclosed/"
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"url": "https://www.theregister.com/2023/12/20/terrapin_attack_ssh"
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"url": "https://filezilla-project.org/versions.php"
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"url": "https://nova.app/releases/#v11.8"
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"url": "https://roumenpetrov.info/secsh/#news20231220"
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"dateUpdated": "2025-11-04T22:05:21.417Z",
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CVE-2023-51384 (GCVE-0-2023-51384)
Vulnerability from cvelistv5 – Published: 2023-12-18 00:00 – Updated: 2024-08-02 22:32
VLAI?
Summary
In ssh-agent in OpenSSH before 9.6, certain destination constraints can be incompletely applied. When destination constraints are specified during addition of PKCS#11-hosted private keys, these constraints are only applied to the first key, even if a PKCS#11 token returns multiple keys.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
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CVE-2023-40216 (GCVE-0-2023-40216)
Vulnerability from cvelistv5 – Published: 2023-08-10 00:00 – Updated: 2024-10-09 20:23
VLAI?
Summary
OpenBSD 7.3 before errata 014 is missing an argument-count bounds check in console terminal emulation. This could cause incorrect memory access and a kernel crash after receiving crafted DCS or CSI terminal escape sequences.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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CVE-2023-38408 (GCVE-0-2023-38408)
Vulnerability from cvelistv5 – Published: 2023-07-20 00:00 – Updated: 2024-10-15 18:33
VLAI?
Summary
The PKCS#11 feature in ssh-agent in OpenSSH before 9.3p2 has an insufficiently trustworthy search path, leading to remote code execution if an agent is forwarded to an attacker-controlled system. (Code in /usr/lib is not necessarily safe for loading into ssh-agent.) NOTE: this issue exists because of an incomplete fix for CVE-2016-10009.
Severity ?
9.8 (Critical)
CWE
- n/a
Assigner
References
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|
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CVE-2023-35784 (GCVE-0-2023-35784)
Vulnerability from cvelistv5 – Published: 2023-06-16 00:00 – Updated: 2024-12-17 17:05
VLAI?
Summary
A double free or use after free could occur after SSL_clear in OpenBSD 7.2 before errata 026 and 7.3 before errata 004, and in LibreSSL before 3.6.3 and 3.7.x before 3.7.3. NOTE: OpenSSL is not affected.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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CVE-2021-46880 (GCVE-0-2021-46880)
Vulnerability from cvelistv5 – Published: 2023-04-14 00:00 – Updated: 2025-02-07 16:08
VLAI?
Summary
x509/x509_verify.c in LibreSSL before 3.4.2, and OpenBSD before 7.0 errata 006, allows authentication bypass because an error for an unverified certificate chain is sometimes discarded.
Severity ?
9.8 (Critical)
CWE
- n/a
Assigner
References
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CVE-2022-48437 (GCVE-0-2022-48437)
Vulnerability from cvelistv5 – Published: 2023-04-12 00:00 – Updated: 2025-02-10 16:41
VLAI?
Summary
An issue was discovered in x509/x509_verify.c in LibreSSL before 3.6.1, and in OpenBSD before 7.2 errata 001. x509_verify_ctx_add_chain does not store errors that occur during leaf certificate verification, and therefore an incorrect error is returned. This behavior occurs when there is an installed verification callback that instructs the verifier to continue upon detecting an invalid certificate.
Severity ?
5.3 (Medium)
CWE
- n/a
Assigner
References
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CVE-2023-29323 (GCVE-0-2023-29323)
Vulnerability from cvelistv5 – Published: 2023-04-04 00:00 – Updated: 2025-11-04 18:14
VLAI?
Summary
ascii_load_sockaddr in smtpd in OpenBSD before 7.1 errata 024 and 7.2 before errata 020, and OpenSMTPD Portable before 7.0.0-portable commit f748277, can abort upon a connection from a local, scoped IPv6 address.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | ||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
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CVE-2023-28531 (GCVE-0-2023-28531)
Vulnerability from cvelistv5 – Published: 2023-03-17 00:00 – Updated: 2025-11-04 18:14
VLAI?
Summary
ssh-add in OpenSSH before 9.3 adds smartcard keys to ssh-agent without the intended per-hop destination constraints. The earliest affected version is 8.9.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
| URL | Tags | |
|---|---|---|
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CVE-2023-27567 (GCVE-0-2023-27567)
Vulnerability from cvelistv5 – Published: 2023-03-03 00:00 – Updated: 2025-03-06 16:41
VLAI?
Summary
In OpenBSD 7.2, a TCP packet with destination port 0 that matches a pf divert-to rule can crash the kernel.
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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CVE-2023-25136 (GCVE-0-2023-25136)
Vulnerability from cvelistv5 – Published: 2023-02-03 00:00 – Updated: 2024-08-02 11:18
VLAI?
Summary
OpenSSH server (sshd) 9.1 introduced a double-free vulnerability during options.kex_algorithms handling. This is fixed in OpenSSH 9.2. The double free can be leveraged, by an unauthenticated remote attacker in the default configuration, to jump to any location in the sshd address space. One third-party report states "remote code execution is theoretically possible."
Severity ?
No CVSS data available.
CWE
- n/a
Assigner
References
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