rhsa-2016_0566
Vulnerability from csaf_redhat
Published
2016-03-31 23:20
Modified
2024-11-22 09:51
Summary
Red Hat Security Advisory: libssh security update
Notes
Topic
An update for libssh is now available for Red Hat Enterprise Linux 7 Extras.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details
libssh is a library which implements the SSH protocol. It can be used to implement client and server applications.
Security Fix(es):
* A type confusion issue was found in the way libssh generated ephemeral secrets for the diffie-hellman-group1 and diffie-hellman-group14 key exchange methods. This would cause an SSHv2 Diffie-Hellman handshake to use significantly less secure random parameters. (CVE-2016-0739)
Red Hat would like to thank Aris Adamantiadis for reporting this issue.
Terms of Use
This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Moderate" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Copyright \u00a9 Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "summary", "text": "An update for libssh is now available for Red Hat Enterprise Linux 7 Extras.\n\nRed Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.", "title": "Topic" }, { "category": "general", "text": "libssh is a library which implements the SSH protocol. It can be used to implement client and server applications.\n\nSecurity Fix(es):\n\n* A type confusion issue was found in the way libssh generated ephemeral secrets for the diffie-hellman-group1 and diffie-hellman-group14 key exchange methods. This would cause an SSHv2 Diffie-Hellman handshake to use significantly less secure random parameters. (CVE-2016-0739)\n\nRed Hat would like to thank Aris Adamantiadis for reporting this issue.", "title": "Details" }, { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2016:0566", "url": "https://access.redhat.com/errata/RHSA-2016:0566" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#moderate", "url": "https://access.redhat.com/security/updates/classification/#moderate" }, { "category": "external", "summary": "1305971", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1305971" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2016/rhsa-2016_0566.json" } ], "title": "Red Hat Security Advisory: libssh security update", "tracking": { "current_release_date": "2024-11-22T09:51:10+00:00", "generator": { "date": "2024-11-22T09:51:10+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.2.1" } }, "id": "RHSA-2016:0566", "initial_release_date": "2016-03-31T23:20:27+00:00", "revision_history": [ { "date": "2016-03-31T23:20:27+00:00", "number": "1", "summary": "Initial version" }, { "date": "2016-03-31T23:20:27+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2024-11-22T09:51:10+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Red Hat Enterprise Linux 7 Extras", "product": { "name": "Red Hat Enterprise Linux 7 Extras", "product_id": "7Server-EXTRAS", "product_identification_helper": { "cpe": "cpe:/a:redhat:rhel_extras_other:7" } } } ], "category": "product_family", "name": "Red Hat Enterprise Linux Extras" }, { "branches": [ { "category": "product_version", "name": "libssh-0:0.7.1-2.el7.src", "product": { "name": "libssh-0:0.7.1-2.el7.src", "product_id": "libssh-0:0.7.1-2.el7.src", "product_identification_helper": { "purl": "pkg:rpm/redhat/libssh@0.7.1-2.el7?arch=src" } } } ], "category": "architecture", "name": "src" }, { "branches": [ { "category": "product_version", "name": "libssh-devel-0:0.7.1-2.el7.x86_64", "product": { "name": "libssh-devel-0:0.7.1-2.el7.x86_64", "product_id": "libssh-devel-0:0.7.1-2.el7.x86_64", "product_identification_helper": { "purl": "pkg:rpm/redhat/libssh-devel@0.7.1-2.el7?arch=x86_64" } } }, { "category": "product_version", "name": "libssh-0:0.7.1-2.el7.x86_64", "product": { "name": "libssh-0:0.7.1-2.el7.x86_64", "product_id": "libssh-0:0.7.1-2.el7.x86_64", "product_identification_helper": { "purl": "pkg:rpm/redhat/libssh@0.7.1-2.el7?arch=x86_64" } } }, { "category": "product_version", "name": "libssh-debuginfo-0:0.7.1-2.el7.x86_64", "product": { "name": "libssh-debuginfo-0:0.7.1-2.el7.x86_64", "product_id": "libssh-debuginfo-0:0.7.1-2.el7.x86_64", "product_identification_helper": { "purl": "pkg:rpm/redhat/libssh-debuginfo@0.7.1-2.el7?arch=x86_64" } } } ], "category": "architecture", "name": "x86_64" } ], "category": "vendor", "name": "Red Hat" } ], "relationships": [ { "category": "default_component_of", "full_product_name": { "name": "libssh-0:0.7.1-2.el7.src as a component of Red Hat Enterprise Linux 7 Extras", "product_id": "7Server-EXTRAS:libssh-0:0.7.1-2.el7.src" }, "product_reference": "libssh-0:0.7.1-2.el7.src", "relates_to_product_reference": "7Server-EXTRAS" }, { "category": "default_component_of", "full_product_name": { "name": "libssh-0:0.7.1-2.el7.x86_64 as a component of Red Hat Enterprise Linux 7 Extras", "product_id": "7Server-EXTRAS:libssh-0:0.7.1-2.el7.x86_64" }, "product_reference": "libssh-0:0.7.1-2.el7.x86_64", "relates_to_product_reference": "7Server-EXTRAS" }, { "category": "default_component_of", "full_product_name": { "name": "libssh-debuginfo-0:0.7.1-2.el7.x86_64 as a component of Red Hat Enterprise Linux 7 Extras", "product_id": "7Server-EXTRAS:libssh-debuginfo-0:0.7.1-2.el7.x86_64" }, "product_reference": "libssh-debuginfo-0:0.7.1-2.el7.x86_64", "relates_to_product_reference": "7Server-EXTRAS" }, { "category": "default_component_of", "full_product_name": { "name": "libssh-devel-0:0.7.1-2.el7.x86_64 as a component of Red Hat Enterprise Linux 7 Extras", "product_id": "7Server-EXTRAS:libssh-devel-0:0.7.1-2.el7.x86_64" }, "product_reference": "libssh-devel-0:0.7.1-2.el7.x86_64", "relates_to_product_reference": "7Server-EXTRAS" } ] }, "vulnerabilities": [ { "acknowledgments": [ { "names": [ "Aris Adamantiadis" ] } ], "cve": "CVE-2016-0739", "cwe": { "id": "CWE-704", "name": "Incorrect Type Conversion or Cast" }, "discovery_date": "2016-01-14T00:00:00+00:00", "ids": [ { "system_name": "Red Hat Bugzilla ID", "text": "1305971" } ], "notes": [ { "category": "description", "text": "A type confusion issue was found in the way libssh generated ephemeral secrets for the diffie-hellman-group1 and diffie-hellman-group14 key exchange methods. This would cause an SSHv2 Diffie-Hellman handshake to use significantly less secure random parameters.", "title": "Vulnerability description" }, { "category": "summary", "text": "libssh: bits/bytes confusion resulting in truncated Difffie-Hellman secret length", "title": "Vulnerability summary" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "7Server-EXTRAS:libssh-0:0.7.1-2.el7.src", "7Server-EXTRAS:libssh-0:0.7.1-2.el7.x86_64", "7Server-EXTRAS:libssh-debuginfo-0:0.7.1-2.el7.x86_64", "7Server-EXTRAS:libssh-devel-0:0.7.1-2.el7.x86_64" ] }, "references": [ { "category": "self", "summary": "Canonical URL", "url": "https://access.redhat.com/security/cve/CVE-2016-0739" }, { "category": "external", "summary": "RHBZ#1305971", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1305971" }, { "category": "external", "summary": "https://www.cve.org/CVERecord?id=CVE-2016-0739", "url": "https://www.cve.org/CVERecord?id=CVE-2016-0739" }, { "category": "external", "summary": "https://nvd.nist.gov/vuln/detail/CVE-2016-0739", "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-0739" }, { "category": "external", "summary": "https://www.libssh.org/security/advisories/CVE-2016-0739.txt", "url": "https://www.libssh.org/security/advisories/CVE-2016-0739.txt" } ], "release_date": "2016-02-23T00:00:00+00:00", "remediations": [ { "category": "vendor_fix", "date": "2016-03-31T23:20:27+00:00", "details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nAfter installing these updated packages, all running applications using libssh must be restarted for this update to take effect.", "product_ids": [ "7Server-EXTRAS:libssh-0:0.7.1-2.el7.src", "7Server-EXTRAS:libssh-0:0.7.1-2.el7.x86_64", "7Server-EXTRAS:libssh-debuginfo-0:0.7.1-2.el7.x86_64", "7Server-EXTRAS:libssh-devel-0:0.7.1-2.el7.x86_64" ], "restart_required": { "category": "none" }, "url": "https://access.redhat.com/errata/RHSA-2016:0566" } ], "scores": [ { "cvss_v2": { "accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "version": "2.0" }, "products": [ "7Server-EXTRAS:libssh-0:0.7.1-2.el7.src", "7Server-EXTRAS:libssh-0:0.7.1-2.el7.x86_64", "7Server-EXTRAS:libssh-debuginfo-0:0.7.1-2.el7.x86_64", "7Server-EXTRAS:libssh-devel-0:0.7.1-2.el7.x86_64" ] } ], "threats": [ { "category": "impact", "details": "Moderate" } ], "title": "libssh: bits/bytes confusion resulting in truncated Difffie-Hellman secret length" } ] }
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Sightings
Author | Source | Type | Date |
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.