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20 vulnerabilities by dropbear_ssh_project
CVE-2023-48795 (GCVE-0-2023-48795)
Vulnerability from cvelistv5 – Published: 2023-12-18 00:00 – Updated: 2026-05-12 11:02
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)
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- n/a
- CWE-354 - Improper Validation of Integrity Check Value
Assigner
References
139 references
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| Siemens | RUGGEDCOM APE1808 |
Affected:
0 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.5 , < *
(custom)
|
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CVE-2021-36369 (GCVE-0-2021-36369)
Vulnerability from cvelistv5 – Published: 2022-10-12 00:00 – Updated: 2025-05-15 18:45
VLAI
Summary
An issue was discovered in Dropbear through 2020.81. Due to a non-RFC-compliant check of the available authentication methods in the client-side SSH code, it is possible for an SSH server to change the login process in its favor. This attack can bypass additional security measures such as FIDO2 tokens or SSH-Askpass. Thus, it allows an attacker to abuse a forwarded agent for logging on to another server unnoticed.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- n/a
- CWE-287 - Improper Authentication
Assigner
References
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CVE-2020-36254 (GCVE-0-2020-36254)
Vulnerability from cvelistv5 – Published: 2021-02-25 08:29 – Updated: 2025-12-03 18:09
VLAI
Summary
scp.c in Dropbear before 2020.79 mishandles the filename of . or an empty filename, a related issue to CVE-2018-20685.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/mkj/dropbear/commit/8f8a3dff70… | x_refsource_MISC |
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CVE-2019-12953 (GCVE-0-2019-12953)
Vulnerability from cvelistv5 – Published: 2020-12-30 19:33 – Updated: 2024-08-04 23:32
VLAI
Summary
Dropbear 2011.54 through 2018.76 has an inconsistent failure delay that may lead to revealing valid usernames, a different issue than CVE-2018-15599.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://matt.ucc.asn.au/dropbear/CHANGES | x_refsource_MISC |
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CVE-2017-2659 (GCVE-0-2017-2659)
Vulnerability from cvelistv5 – Published: 2019-03-20 20:44 – Updated: 2024-08-05 14:02
VLAI
Summary
It was found that dropbear before version 2013.59 with GSSAPI leaks whether given username is valid or invalid. When an invalid username is given, the GSSAPI authentication failure was incorrectly counted towards the maximum allowed number of password attempts.
Severity
5.3 (Medium)
CWE
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… | x_refsource_CONFIRM |
| https://secure.ucc.asn.au/hg/dropbear/rev/d778461… | x_refsource_MISC |
Date Public
2019-03-18 00:00
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CVE-2018-15599 (GCVE-0-2018-15599)
Vulnerability from cvelistv5 – Published: 2018-08-21 01:00 – Updated: 2024-08-05 10:01
VLAI
Summary
The recv_msg_userauth_request function in svr-auth.c in Dropbear through 2018.76 is prone to a user enumeration vulnerability because username validity affects how fields in SSH_MSG_USERAUTH messages are handled, a similar issue to CVE-2018-15473 in an unrelated codebase.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://matt.ucc.asn.au/dropbear/CHANGES | x_refsource_CONFIRM |
| http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear… | x_refsource_MISC |
| http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear… | x_refsource_MISC |
| https://lists.debian.org/debian-lts-announce/2018… | mailing-listx_refsource_MLIST |
| https://old.reddit.com/r/blackhat/comments/97ywnm… | x_refsource_MISC |
Date Public
2018-08-20 00:00
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CVE-2017-9078 (GCVE-0-2017-9078)
Vulnerability from cvelistv5 – Published: 2017-05-19 14:00 – Updated: 2024-08-05 16:55
VLAI
Summary
The server in Dropbear before 2017.75 might allow post-authentication root remote code execution because of a double free in cleanup of TCP listeners when the -a option is enabled.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
3 references
| URL | Tags |
|---|---|
| http://www.debian.org/security/2017/dsa-3859 | vendor-advisoryx_refsource_DEBIAN |
| http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear… | x_refsource_CONFIRM |
| https://security.netapp.com/advisory/ntap-2019100… | x_refsource_CONFIRM |
Date Public
2017-05-19 00:00
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CVE-2017-9079 (GCVE-0-2017-9079)
Vulnerability from cvelistv5 – Published: 2017-05-19 14:00 – Updated: 2024-08-05 16:55
VLAI
Summary
Dropbear before 2017.75 might allow local users to read certain files as root, if the file has the authorized_keys file format with a command= option. This occurs because ~/.ssh/authorized_keys is read with root privileges and symlinks are followed.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
3 references
| URL | Tags |
|---|---|
| http://www.debian.org/security/2017/dsa-3859 | vendor-advisoryx_refsource_DEBIAN |
| http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear… | x_refsource_CONFIRM |
| https://security.netapp.com/advisory/ntap-2019100… | x_refsource_CONFIRM |
Date Public
2017-05-19 00:00
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CVE-2016-7409 (GCVE-0-2016-7409)
Vulnerability from cvelistv5 – Published: 2017-03-03 16:00 – Updated: 2024-08-06 01:57
VLAI
Summary
The dbclient and server in Dropbear SSH before 2016.74, when compiled with DEBUG_TRACE, allows local users to read process memory via the -v argument, related to a failed remote ident.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://security.gentoo.org/glsa/201702-23 | vendor-advisoryx_refsource_GENTOO |
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CVE-2016-7406 (GCVE-0-2016-7406)
Vulnerability from cvelistv5 – Published: 2017-03-03 16:00 – Updated: 2025-11-04 16:09
VLAI
Summary
Format string vulnerability in Dropbear SSH before 2016.74 allows remote attackers to execute arbitrary code via format string specifiers in the (1) username or (2) host argument.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://security.gentoo.org/glsa/201702-23 | vendor-advisoryx_refsource_GENTOO |
| http://www.securityfocus.com/bid/92974 | vdb-entryx_refsource_BID |
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| https://secure.ucc.asn.au/hg/dropbear/rev/b66a483f3dcb | x_refsource_CONFIRM |
| http://seclists.org/fulldisclosure/2024/Aug/35 |
Date Public
2016-09-15 00:00
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CVE-2016-7407 (GCVE-0-2016-7407)
Vulnerability from cvelistv5 – Published: 2017-03-03 16:00 – Updated: 2024-08-06 01:57
VLAI
Summary
The dropbearconvert command in Dropbear SSH before 2016.74 allows attackers to execute arbitrary code via a crafted OpenSSH key file.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://security.gentoo.org/glsa/201702-23 | vendor-advisoryx_refsource_GENTOO |
| https://secure.ucc.asn.au/hg/dropbear/rev/34e6127ef02e | x_refsource_CONFIRM |
| http://www.openwall.com/lists/oss-security/2016/09/15/2 | mailing-listx_refsource_MLIST |
| https://bugzilla.redhat.com/show_bug.cgi?id=1376353 | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/92972 | vdb-entryx_refsource_BID |
Date Public
2016-09-15 00:00
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CVE-2016-7408 (GCVE-0-2016-7408)
Vulnerability from cvelistv5 – Published: 2017-03-03 16:00 – Updated: 2024-08-06 01:57
VLAI
Summary
The dbclient in Dropbear SSH before 2016.74 allows remote attackers to execute arbitrary code via a crafted (1) -m or (2) -c argument.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://security.gentoo.org/glsa/201702-23 | vendor-advisoryx_refsource_GENTOO |
| http://www.securityfocus.com/bid/92970 | vdb-entryx_refsource_BID |
| http://www.openwall.com/lists/oss-security/2016/09/15/2 | mailing-listx_refsource_MLIST |
| https://bugzilla.redhat.com/show_bug.cgi?id=1376353 | x_refsource_CONFIRM |
| https://secure.ucc.asn.au/hg/dropbear/rev/eed9376a4ad6 | x_refsource_CONFIRM |
Date Public
2016-09-15 00:00
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CVE-2016-3116 (GCVE-0-2016-3116)
Vulnerability from cvelistv5 – Published: 2016-03-22 10:00 – Updated: 2024-08-05 23:47
VLAI
Summary
CRLF injection vulnerability in Dropbear SSH before 2016.72 allows remote authenticated users to bypass intended shell-command restrictions via crafted X11 forwarding data.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
10 references
| URL | Tags |
|---|---|
| https://github.com/tintinweb/pub/tree/master/pocs… | x_refsource_MISC |
| https://matt.ucc.asn.au/dropbear/CHANGES | x_refsource_CONFIRM |
| http://lists.fedoraproject.org/pipermail/package-… | vendor-advisoryx_refsource_FEDORA |
| http://packetstormsecurity.com/files/136251/Dropb… | x_refsource_MISC |
| http://lists.fedoraproject.org/pipermail/package-… | vendor-advisoryx_refsource_FEDORA |
| http://seclists.org/fulldisclosure/2016/Mar/47 | mailing-listx_refsource_FULLDISC |
| http://lists.fedoraproject.org/pipermail/package-… | vendor-advisoryx_refsource_FEDORA |
| http://lists.opensuse.org/opensuse-updates/2016-0… | vendor-advisoryx_refsource_SUSE |
| https://security.gentoo.org/glsa/201607-08 | vendor-advisoryx_refsource_GENTOO |
| http://lists.opensuse.org/opensuse-updates/2016-0… | vendor-advisoryx_refsource_SUSE |
Date Public
2016-03-09 00:00
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CVE-2013-4421 (GCVE-0-2013-4421)
Vulnerability from cvelistv5 – Published: 2013-10-25 23:00 – Updated: 2024-08-06 16:45
VLAI
Summary
The buf_decompress function in packet.c in Dropbear SSH Server before 2013.59 allows remote attackers to cause a denial of service (memory consumption) via a compressed packet that has a large size when it is decompressed.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
10 references
| URL | Tags |
|---|---|
| http://secunia.com/advisories/55173 | third-party-advisoryx_refsource_SECUNIA |
| https://matt.ucc.asn.au/dropbear/CHANGES | x_refsource_CONFIRM |
| https://secure.ucc.asn.au/hg/dropbear/rev/0bf76f54de6f | x_refsource_CONFIRM |
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| http://lists.opensuse.org/opensuse-updates/2013-1… | vendor-advisoryx_refsource_SUSE |
| http://www.securityfocus.com/bid/62958 | vdb-entryx_refsource_BID |
| https://support.citrix.com/article/CTX216642 | x_refsource_CONFIRM |
| http://lists.fedoraproject.org/pipermail/package-… | vendor-advisoryx_refsource_FEDORA |
| http://lists.opensuse.org/opensuse-updates/2013-1… | vendor-advisoryx_refsource_SUSE |
| http://www.openwall.com/lists/oss-security/2013/10/11/4 | mailing-listx_refsource_MLIST |
Date Public
2013-10-04 00:00
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CVE-2013-4434 (GCVE-0-2013-4434)
Vulnerability from cvelistv5 – Published: 2013-10-25 23:00 – Updated: 2024-08-06 16:45
VLAI
Summary
Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to discover valid usernames.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
8 references
| URL | Tags |
|---|---|
| http://secunia.com/advisories/55173 | third-party-advisoryx_refsource_SECUNIA |
| https://matt.ucc.asn.au/dropbear/CHANGES | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/62993 | vdb-entryx_refsource_BID |
| http://www.openwall.com/lists/oss-security/2013/1… | mailing-listx_refsource_MLIST |
| http://lists.opensuse.org/opensuse-updates/2013-1… | vendor-advisoryx_refsource_SUSE |
| https://support.citrix.com/article/CTX216642 | x_refsource_CONFIRM |
| http://lists.opensuse.org/opensuse-updates/2013-1… | vendor-advisoryx_refsource_SUSE |
| https://secure.ucc.asn.au/hg/dropbear/rev/d7784616409a | x_refsource_CONFIRM |
Date Public
2013-05-26 00:00
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CVE-2012-0920 (GCVE-0-2012-0920)
Vulnerability from cvelistv5 – Published: 2012-06-05 22:00 – Updated: 2024-08-06 18:38
VLAI
Summary
Use-after-free vulnerability in Dropbear SSH Server 0.52 through 2012.54, when command restriction and public key authentication are enabled, allows remote authenticated users to execute arbitrary code and bypass command restrictions via multiple crafted command requests, related to "channels concurrency."
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entryx_refsource_XF |
| http://secunia.com/advisories/48147 | third-party-advisoryx_refsource_SECUNIA |
| http://www.debian.org/security/2012/dsa-2456 | vendor-advisoryx_refsource_DEBIAN |
| http://www.osvdb.org/79590 | vdb-entryx_refsource_OSVDB |
| http://matt.ucc.asn.au/dropbear/CHANGES | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/52159 | vdb-entryx_refsource_BID |
| https://secure.ucc.asn.au/hg/dropbear/rev/818108bf7749 | x_refsource_CONFIRM |
| https://www.mantor.org/~northox/misc/CVE-2012-0920.html | x_refsource_MISC |
| http://secunia.com/advisories/48929 | third-party-advisoryx_refsource_SECUNIA |
Date Public
2012-02-24 00:00
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CVE-2007-1099 (GCVE-0-2007-1099)
Vulnerability from cvelistv5 – Published: 2007-02-26 17:00 – Updated: 2024-08-07 12:43
VLAI
Summary
dbclient in Dropbear SSH client before 0.49 does not sufficiently warn the user when it detects a hostkey mismatch, which might allow remote attackers to conduct man-in-the-middle attacks.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
7 references
| URL | Tags |
|---|---|
| http://www.securityfocus.com/bid/22761 | vdb-entryx_refsource_BID |
| http://secunia.com/advisories/24345 | third-party-advisoryx_refsource_SECUNIA |
| http://www.osvdb.org/32088 | vdb-entryx_refsource_OSVDB |
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entryx_refsource_XF |
| http://www.vupen.com/english/advisories/2007/0785 | vdb-entryx_refsource_VUPEN |
| http://matt.ucc.asn.au/dropbear/CHANGES | x_refsource_CONFIRM |
| http://osvdb.org/33814 | vdb-entryx_refsource_OSVDB |
Date Public
2007-02-23 00:00
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CVE-2006-1206 (GCVE-0-2006-1206)
Vulnerability from cvelistv5 – Published: 2006-03-14 01:00 – Updated: 2024-08-07 17:03
VLAI
Summary
Matt Johnston Dropbear SSH server 0.47 and earlier, as used in embedded Linux devices and on general-purpose operating systems, allows remote attackers to cause a denial of service (connection slot exhaustion) via a large number of connection attempts that exceeds the MAX_UNAUTH_CLIENTS defined value of 30.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
4 references
| URL | Tags |
|---|---|
| http://www.securityfocus.com/archive/1/426999/100… | mailing-listx_refsource_BUGTRAQ |
| http://www.securityfocus.com/bid/17024 | vdb-entryx_refsource_BID |
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entryx_refsource_XF |
| http://securitytracker.com/id?1015742 | vdb-entryx_refsource_SECTRACK |
Date Public
2006-03-07 00:00
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CVE-2005-4178 (GCVE-0-2005-4178)
Vulnerability from cvelistv5 – Published: 2005-12-12 21:00 – Updated: 2024-08-07 23:38
VLAI
Summary
Buffer overflow in Dropbear server before 0.47 allows authenticated users to execute arbitrary code via unspecified inputs that cause insufficient memory to be allocated due to an incorrect expression that does not enforce the proper order of operations.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
9 references
| URL | Tags |
|---|---|
| http://secunia.com/advisories/18142 | third-party-advisoryx_refsource_SECUNIA |
| http://www.securityfocus.com/bid/15923/ | vdb-entryx_refsource_BID |
| http://lists.ucc.gu.uwa.edu.au/pipermail/dropbear… | mailing-listx_refsource_MLIST |
| http://secunia.com/advisories/18109 | third-party-advisoryx_refsource_SECUNIA |
| http://www.gentoo.org/security/en/glsa/glsa-20051… | vendor-advisoryx_refsource_GENTOO |
| http://www.debian.org/security/2005/dsa-923 | vendor-advisoryx_refsource_DEBIAN |
| http://secunia.com/advisories/18108 | third-party-advisoryx_refsource_SECUNIA |
| http://matt.ucc.asn.au/dropbear/dropbear.html | x_refsource_MISC |
| http://www.vupen.com/english/advisories/2005/2962 | vdb-entryx_refsource_VUPEN |
Date Public
2005-12-11 00:00
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CVE-2004-2486 (GCVE-0-2004-2486)
Vulnerability from cvelistv5 – Published: 2005-10-25 04:00 – Updated: 2024-08-08 01:29
VLAI
Summary
The DSS verification code in Dropbear SSH Server before 0.43 frees uninitialized variables, which might allow remote attackers to gain access.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entryx_refsource_XF |
| http://www.cisco.com/en/US/products/products_secu… | vendor-advisoryx_refsource_CISCO |
| http://www.osvdb.org/8137 | vdb-entryx_refsource_OSVDB |
| http://secunia.com/advisories/12153 | third-party-advisoryx_refsource_SECUNIA |
| http://matt.ucc.asn.au/dropbear/CHANGES | x_refsource_CONFIRM |
| http://www.vupen.com/english/advisories/2008/0543 | vdb-entryx_refsource_VUPEN |
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entryx_refsource_XF |
| http://secunia.com/advisories/28935 | third-party-advisoryx_refsource_SECUNIA |
| http://www.securityfocus.com/bid/10803 | vdb-entryx_refsource_BID |
Date Public
2004-07-16 00:00
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