Openbsd : Security Vulnerabilities

CVSS Scores Greater Than: 0 1 2 3 4 5 6 7 8 9

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#	CVE ID	CWE ID	Vulnerability Type(s)	Publish Date	Update Date	Score	Gained Access Level	Access	Complexity	Authentication	Conf.	Integ.	Avail.
1	CVE-2019-8460	20	DoS	2019-08-26	2019-09-05	5.0	None	Remote	Low	Not required	None	None	Partial
Reuven Plevinsky and Tal Vainshtein of Check Point Software Technologies Ltd. discovered that OpenBSD kernel (all versions, including 6.5) can be forced to create long chains of TCP SACK holes that cause very expensive calls to tcp_sack_option() for every incoming SACK packet which can lead to a denial of service.
2	CVE-2019-6111	20	Dir. Trav.	2019-01-31	2019-05-03	5.8	None	Remote	Medium	Not required	None	Partial	Partial
An issue was discovered in OpenSSH 7.9. Due to the scp implementation being derived from 1983 rcp, the server chooses which files/directories are sent to the client. However, the scp client only performs cursory validation of the object name returned (only directory traversal attacks are prevented). A malicious scp server (or Man-in-The-Middle attacker) can overwrite arbitrary files in the scp client target directory. If recursive operation (-r) is performed, the server can manipulate subdirectories as well (for example, to overwrite the .ssh/authorized_keys file).
3	CVE-2019-6110	284		2019-01-31	2019-04-18	4.0	None	Remote	High	Not required	Partial	Partial	None
In OpenSSH 7.9, due to accepting and displaying arbitrary stderr output from the server, a malicious server (or Man-in-The-Middle attacker) can manipulate the client output, for example to use ANSI control codes to hide additional files being transferred.
4	CVE-2019-6109	284		2019-01-31	2019-05-03	4.0	None	Remote	High	Not required	Partial	Partial	None
An issue was discovered in OpenSSH 7.9. Due to missing character encoding in the progress display, a malicious server (or Man-in-The-Middle attacker) can employ crafted object names to manipulate the client output, e.g., by using ANSI control codes to hide additional files being transferred. This affects refresh_progress_meter() in progressmeter.c.
5	CVE-2018-20685	706	Bypass	2019-01-10	2019-10-02	2.6	None	Remote	High	Not required	None	Partial	None
In OpenSSH 7.9, scp.c in the scp client allows remote SSH servers to bypass intended access restrictions via the filename of . or an empty filename. The impact is modifying the permissions of the target directory on the client side.
6	CVE-2018-15919	200	+Info	2018-08-28	2018-12-22	5.0	None	Remote	Low	Not required	Partial	None	None
Remotely observable behaviour in auth-gss2.c in OpenSSH through 7.8 could be used by remote attackers to detect existence of users on a target system when GSS2 is in use. NOTE: the discoverer states 'We understand that the OpenSSH developers do not want to treat such a username enumeration (or "oracle") as a vulnerability.'
7	CVE-2018-15473	200	+Info	2018-08-17	2019-08-06	5.0	None	Remote	Low	Not required	Partial	None	None
OpenSSH through 7.7 is prone to a user enumeration vulnerability due to not delaying bailout for an invalid authenticating user until after the packet containing the request has been fully parsed, related to auth2-gss.c, auth2-hostbased.c, and auth2-pubkey.c.
8	CVE-2018-14775	20	DoS	2018-08-01	2018-10-03	4.9	None	Local	Low	Not required	None	None	Complete
tss_alloc in sys/arch/i386/i386/gdt.c in OpenBSD 6.2 and 6.3 has a Local Denial of Service (system crash) due to incorrect I/O port access control on the i386 architecture.
9	CVE-2018-12438	320		2018-06-14	2018-08-09	1.9	None	Local	Medium	Not required	Partial	None	None
The Elliptic Curve Cryptography library (aka sunec or libsunec) allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.
10	CVE-2018-12437	320		2018-06-14	2018-08-09	1.9	None	Local	Medium	Not required	Partial	None	None
LibTomCrypt through 1.18.1 allows a memory-cache side-channel attack on ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover an ECDSA key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.
11	CVE-2018-12434	200	+Info	2018-06-14	2018-08-06	1.9	None	Local	Medium	Not required	Partial	None	None
LibreSSL before 2.6.5 and 2.7.x before 2.7.4 allows a memory-cache side-channel attack on DSA and ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover a key, the attacker needs access to either the local machine or a different virtual machine on the same physical host.
12	CVE-2018-12433	320		2018-06-14	2018-08-09	1.9	None	Local	Medium	Not required	Partial	None	None
DISPUTED cryptlib through 3.4.4 allows a memory-cache side-channel attack on DSA and ECDSA signatures, aka the Return Of the Hidden Number Problem or ROHNP. To discover a key, the attacker needs access to either the local machine or a different virtual machine on the same physical host. NOTE: the vendor does not include side-channel attacks within its threat model.
13	CVE-2018-8970	295	+Info	2018-03-24	2018-04-24	5.8	None	Remote	Medium	Not required	Partial	Partial	None
The int_x509_param_set_hosts function in lib/libcrypto/x509/x509_vpm.c in LibreSSL 2.7.0 before 2.7.1 does not support a certain special case of a zero name length, which causes silent omission of hostname verification, and consequently allows man-in-the-middle attackers to spoof servers and obtain sensitive information via a crafted certificate. NOTE: the LibreSSL documentation indicates that this special case is supported, but the BoringSSL documentation does not.
14	CVE-2017-1000373	400	Exec Code	2017-06-19	2017-10-23	6.4	None	Remote	Low	Not required	None	Partial	Partial
The OpenBSD qsort() function is recursive, and not randomized, an attacker can construct a pathological input array of N elements that causes qsort() to deterministically recurse N/4 times. This allows attackers to consume arbitrary amounts of stack memory and manipulate stack memory to assist in arbitrary code execution attacks. This affects OpenBSD 6.1 and possibly earlier versions.
15	CVE-2017-1000372		Exec Code Bypass	2017-06-19	2019-10-02	7.5	None	Remote	Low	Not required	Partial	Partial	Partial
A flaw exists in OpenBSD's implementation of the stack guard page that allows attackers to bypass it resulting in arbitrary code execution using setuid binaries such as /usr/bin/at. This affects OpenBSD 6.1 and possibly earlier versions.
16	CVE-2017-15906	269		2017-10-25	2019-10-02	5.0	None	Remote	Low	Not required	None	Partial	None
The process_open function in sftp-server.c in OpenSSH before 7.6 does not properly prevent write operations in readonly mode, which allows attackers to create zero-length files.
17	CVE-2017-8301	295		2017-04-27	2019-10-02	2.6	None	Remote	High	Not required	None	Partial	None
LibreSSL 2.5.1 to 2.5.3 lacks TLS certificate verification if SSL_get_verify_result is relied upon for a later check of a verification result, in a use case where a user-provided verification callback returns 1, as demonstrated by acceptance of invalid certificates by nginx.
18	CVE-2017-5850	770	DoS	2017-03-27	2019-10-02	7.8	None	Remote	Low	Not required	None	None	Complete
httpd in OpenBSD allows remote attackers to cause a denial of service (memory consumption) via a series of requests for a large file using an HTTP Range header.
19	CVE-2016-10708	476	DoS	2018-01-21	2019-06-26	5.0	None	Remote	Low	Not required	None	None	Partial
sshd in OpenSSH before 7.4 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via an out-of-sequence NEWKEYS message, as demonstrated by Honggfuzz, related to kex.c and packet.c.
20	CVE-2016-10012	119	Overflow +Priv	2017-01-04	2018-09-11	7.2	None	Local	Low	Not required	Complete	Complete	Complete
The shared memory manager (associated with pre-authentication compression) in sshd in OpenSSH before 7.4 does not ensure that a bounds check is enforced by all compilers, which might allows local users to gain privileges by leveraging access to a sandboxed privilege-separation process, related to the m_zback and m_zlib data structures.
21	CVE-2016-10011	320	+Info	2017-01-04	2018-09-11	2.1	None	Local	Low	Not required	Partial	None	None
authfile.c in sshd in OpenSSH before 7.4 does not properly consider the effects of realloc on buffer contents, which might allow local users to obtain sensitive private-key information by leveraging access to a privilege-separated child process.
22	CVE-2016-10010	264	+Priv	2017-01-04	2018-05-31	6.9	None	Local	Medium	Not required	Complete	Complete	Complete
sshd in OpenSSH before 7.4, when privilege separation is not used, creates forwarded Unix-domain sockets as root, which might allow local users to gain privileges via unspecified vectors, related to serverloop.c.
23	CVE-2016-10009	426		2017-01-04	2018-09-11	7.5	None	Remote	Low	Not required	Partial	Partial	Partial
Untrusted search path vulnerability in ssh-agent.c in ssh-agent in OpenSSH before 7.4 allows remote attackers to execute arbitrary local PKCS#11 modules by leveraging control over a forwarded agent-socket.
24	CVE-2016-8858	399	DoS	2016-12-09	2018-09-19	7.8	None	Remote	Low	Not required	None	None	Complete
DISPUTED The kex_input_kexinit function in kex.c in OpenSSH 6.x and 7.x through 7.3 allows remote attackers to cause a denial of service (memory consumption) by sending many duplicate KEXINIT requests. NOTE: a third party reports that "OpenSSH upstream does not consider this as a security issue."
25	CVE-2016-6522	190	DoS Overflow	2017-03-07	2017-03-08	4.9	None	Local	Low	Not required	None	None	Complete
Integer overflow in the uvm_map_isavail function in uvm/uvm_map.c in OpenBSD 5.9 allows local users to cause a denial of service (kernel panic) via a crafted mmap call, which triggers the new mapping to overlap with an existing mapping.
26	CVE-2016-6515	20	DoS	2016-08-07	2018-09-11	7.8	None	Remote	Low	Not required	None	None	Complete
The auth_password function in auth-passwd.c in sshd in OpenSSH before 7.3 does not limit password lengths for password authentication, which allows remote attackers to cause a denial of service (crypt CPU consumption) via a long string.
27	CVE-2016-6350	476	DoS	2017-03-07	2017-03-08	4.9	None	Local	Low	Not required	None	None	Complete
OpenBSD 5.8 and 5.9 allows local users to cause a denial of service (NULL pointer dereference and panic) via a sysctl call with a path starting with 10,9.
28	CVE-2016-6247	20	DoS	2017-03-07	2017-03-08	4.9	None	Local	Low	Not required	None	None	Complete
OpenBSD 5.8 and 5.9 allows certain local users to cause a denial of service (kernel panic) by unmounting a filesystem with an open vnode on the mnt_vnodelist.
29	CVE-2016-6246	20	DoS	2017-03-07	2017-03-08	4.9	None	Local	Low	Not required	None	None	Complete
OpenBSD 5.8 and 5.9 allows certain local users with kern.usermount privileges to cause a denial of service (kernel panic) by mounting a tmpfs with a VNOVAL in the (1) username, (2) groupname, or (3) device name of the root node.
30	CVE-2016-6245		DoS	2017-03-07	2017-03-08	4.9	None	Local	Low	Not required	None	None	Complete
OpenBSD 5.8 and 5.9 allows local users to cause a denial of service (kernel panic) via a large size in a getdents system call.
31	CVE-2016-6244	20	DoS	2017-03-07	2017-03-08	7.8	None	Remote	Low	Not required	None	None	Complete
The sys_thrsigdivert function in kern/kern_sig.c in the OpenBSD kernel 5.9 allows remote attackers to cause a denial of service (panic) via a negative "ts.tv_sec" value.
32	CVE-2016-6243	20	DoS	2017-03-07	2017-03-08	4.9	None	Local	Low	Not required	None	None	Complete
thrsleep in kern/kern_synch.c in OpenBSD 5.8 and 5.9 allows local users to cause a denial of service (kernel panic) via a crafted value in the tsp parameter of the __thrsleep system call.
33	CVE-2016-6242	189	DoS	2017-03-07	2017-03-08	4.9	None	Local	Low	Not required	None	None	Complete
OpenBSD 5.8 and 5.9 allows local users to cause a denial of service (assertion failure and kernel panic) via a large ident value in a kevent system call.
34	CVE-2016-6241	190	Exec Code Overflow	2017-03-07	2017-08-31	7.2	None	Local	Low	Not required	Complete	Complete	Complete
Integer overflow in the amap_alloc1 function in OpenBSD 5.8 and 5.9 allows local users to execute arbitrary code with kernel privileges via a large size value.
35	CVE-2016-6240	189	Exec Code	2017-03-07	2017-08-31	7.2	None	Local	Low	Not required	Complete	Complete	Complete
Integer truncation error in the amap_alloc function in OpenBSD 5.8 and 5.9 allows local users to execute arbitrary code with kernel privileges via a large size value.
36	CVE-2016-6239	20	DoS	2017-03-07	2017-08-31	4.9	None	Local	Low	Not required	None	None	Complete
The mmap extension __MAP_NOFAULT in OpenBSD 5.8 and 5.9 allows attackers to cause a denial of service (kernel panic and crash) via a large size value.
37	CVE-2016-6210	200	+Info	2017-02-13	2018-01-04	4.3	None	Remote	Medium	Not required	Partial	None	None
sshd in OpenSSH before 7.3, when SHA256 or SHA512 are used for user password hashing, uses BLOWFISH hashing on a static password when the username does not exist, which allows remote attackers to enumerate users by leveraging the timing difference between responses when a large password is provided.
38	CVE-2016-3115		Bypass	2016-03-22	2018-09-11	5.5	None	Remote	Low	Single system	Partial	Partial	None
Multiple CRLF injection vulnerabilities in session.c in sshd in OpenSSH before 7.2p2 allow remote authenticated users to bypass intended shell-command restrictions via crafted X11 forwarding data, related to the (1) do_authenticated1 and (2) session_x11_req functions.
39	CVE-2016-1908	254		2017-04-11	2018-09-11	7.5	None	Remote	Low	Not required	Partial	Partial	Partial
The client in OpenSSH before 7.2 mishandles failed cookie generation for untrusted X11 forwarding and relies on the local X11 server for access-control decisions, which allows remote X11 clients to trigger a fallback and obtain trusted X11 forwarding privileges by leveraging configuration issues on this X11 server, as demonstrated by lack of the SECURITY extension on this X11 server.
40	CVE-2016-1907	119	DoS Overflow	2016-01-19	2017-02-16	5.0	None	Remote	Low	Not required	None	None	Partial
The ssh_packet_read_poll2 function in packet.c in OpenSSH before 7.1p2 allows remote attackers to cause a denial of service (out-of-bounds read and application crash) via crafted network traffic.
41	CVE-2016-0778	119	DoS Overflow	2016-01-14	2018-10-09	4.6	None	Remote	High	Single system	Partial	Partial	Partial
The (1) roaming_read and (2) roaming_write functions in roaming_common.c in the client in OpenSSH 5.x, 6.x, and 7.x before 7.1p2, when certain proxy and forward options are enabled, do not properly maintain connection file descriptors, which allows remote servers to cause a denial of service (heap-based buffer overflow) or possibly have unspecified other impact by requesting many forwardings.
42	CVE-2016-0777	200	+Info	2016-01-14	2018-10-09	4.0	None	Remote	Low	Single system	Partial	None	None
The resend_bytes function in roaming_common.c in the client in OpenSSH 5.x, 6.x, and 7.x before 7.1p2 allows remote servers to obtain sensitive information from process memory by requesting transmission of an entire buffer, as demonstrated by reading a private key.
43	CVE-2015-8325	264	+Priv	2016-04-30	2018-06-29	7.2	None	Local	Low	Not required	Complete	Complete	Complete
The do_setup_env function in session.c in sshd in OpenSSH through 7.2p2, when the UseLogin feature is enabled and PAM is configured to read .pam_environment files in user home directories, allows local users to gain privileges by triggering a crafted environment for the /bin/login program, as demonstrated by an LD_PRELOAD environment variable.
44	CVE-2015-7687	416	DoS Exec Code	2017-10-16	2017-11-01	7.5	None	Remote	Low	Not required	Partial	Partial	Partial
Use-after-free vulnerability in OpenSMTPD before 5.7.2 allows remote attackers to cause a denial of service (crash) or execute arbitrary code via vectors involving req_ca_vrfy_smtp and req_ca_vrfy_mta.
45	CVE-2015-6565	264	DoS	2015-08-23	2017-09-01	7.2	None	Local	Low	Not required	Complete	Complete	Complete
sshd in OpenSSH 6.8 and 6.9 uses world-writable permissions for TTY devices, which allows local users to cause a denial of service (terminal disruption) or possibly have unspecified other impact by writing to a device, as demonstrated by writing an escape sequence.
46	CVE-2015-6564	264	+Priv	2015-08-23	2018-09-11	6.9	None	Local	Medium	Not required	Complete	Complete	Complete
Use-after-free vulnerability in the mm_answer_pam_free_ctx function in monitor.c in sshd in OpenSSH before 7.0 on non-OpenBSD platforms might allow local users to gain privileges by leveraging control of the sshd uid to send an unexpectedly early MONITOR_REQ_PAM_FREE_CTX request.
47	CVE-2015-6563	20		2015-08-23	2018-09-11	1.9	None	Local	Medium	Not required	None	Partial	None
The monitor component in sshd in OpenSSH before 7.0 on non-OpenBSD platforms accepts extraneous username data in MONITOR_REQ_PAM_INIT_CTX requests, which allows local users to conduct impersonation attacks by leveraging any SSH login access in conjunction with control of the sshd uid to send a crafted MONITOR_REQ_PWNAM request, related to monitor.c and monitor_wrap.c.
48	CVE-2015-5600	264	DoS	2015-08-02	2018-09-11	8.5	None	Remote	Low	Not required	Partial	None	Complete
The kbdint_next_device function in auth2-chall.c in sshd in OpenSSH through 6.9 does not properly restrict the processing of keyboard-interactive devices within a single connection, which makes it easier for remote attackers to conduct brute-force attacks or cause a denial of service (CPU consumption) via a long and duplicative list in the ssh -oKbdInteractiveDevices option, as demonstrated by a modified client that provides a different password for each pam element on this list.
49	CVE-2015-5352	264	Bypass	2015-08-02	2018-10-24	4.3	None	Remote	Medium	Not required	None	Partial	None
The x11_open_helper function in channels.c in ssh in OpenSSH before 6.9, when ForwardX11Trusted mode is not used, lacks a check of the refusal deadline for X connections, which makes it easier for remote attackers to bypass intended access restrictions via a connection outside of the permitted time window.
50	CVE-2014-9424		DoS	2014-12-28	2014-12-30	7.5	None	Remote	Low	Not required	Partial	Partial	Partial
Double free vulnerability in the ssl_parse_clienthello_use_srtp_ext function in d1_srtp.c in LibreSSL before 2.1.2 allows remote attackers to cause a denial of service or possibly have unspecified other impact by triggering a certain length-verification error during processing of a DTLS handshake.

Total number of vulnerabilities : 274 Page : 1 (This Page)2 3 4 5 6