rhsa-2016_0016
Vulnerability from csaf_redhat
Published
2016-01-08 10:17
Modified
2024-11-22 09:42
Summary
Red Hat Security Advisory: samba security update
Notes
Topic
Updated samba packages that fix multiple security issues are now available
for Red Hat Gluster Storage 3.1 for Red Hat Enterprise Linux 7.
Red Hat Product Security has rated this update as having Moderate security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.
Details
Samba is an open-source implementation of the Server Message Block (SMB) or
Common Internet File System (CIFS) protocol, which allows PC-compatible
machines to share files, printers, and other information.
A man-in-the-middle vulnerability was found in the way "connection signing"
was implemented by Samba. A remote attacker could use this flaw to
downgrade an existing Samba client connection and force the use of plain
text. (CVE-2015-5296)
A missing access control flaw was found in Samba. A remote, authenticated
attacker could use this flaw to view the current snapshot on a Samba share,
despite not having DIRECTORY_LIST access rights. (CVE-2015-5299)
Multiple buffer over-read flaws were found in the way Samba handled
malformed inputs in certain encodings. An authenticated, remote attacker
could possibly use these flaws to disclose portions of the server memory.
(CVE-2015-5330)
An access flaw was found in the way Samba verified symbolic links when
creating new files on a Samba share. A remote attacker could exploit this
flaw to gain access to files outside of Samba's share path. (CVE-2015-5252)
Red Hat would like to thank the Samba project for reporting these issues.
Upstream acknowledges Stefan Metzmacher of the Samba Team and Sernet.de as
the original reporters of CVE-2015-5296, partha@exablox.com as the original
reporter of CVE-2015-5299, Jan "Yenya" Kasprzak and the Computer Systems
Unit team at Faculty of Informatics, Masaryk University as the original
reporters of CVE-2015-5252 flaws, and Douglas Bagnall as the original
reporter of CVE-2015-5330.
All samba users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. After installing this
update, the smb service will be restarted automatically.
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.
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"text": "Updated samba packages that fix multiple security issues are now available\nfor Red Hat Gluster Storage 3.1 for Red Hat Enterprise Linux 7.\n\nRed Hat Product Security has rated this update as having Moderate security\nimpact. Common Vulnerability Scoring System (CVSS) base scores, which give\ndetailed severity ratings, are available for each vulnerability from the\nCVE links in the References section.",
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"text": "Samba is an open-source implementation of the Server Message Block (SMB) or\nCommon Internet File System (CIFS) protocol, which allows PC-compatible\nmachines to share files, printers, and other information.\n\nA man-in-the-middle vulnerability was found in the way \"connection signing\"\nwas implemented by Samba. A remote attacker could use this flaw to\ndowngrade an existing Samba client connection and force the use of plain\ntext. (CVE-2015-5296)\n\nA missing access control flaw was found in Samba. A remote, authenticated\nattacker could use this flaw to view the current snapshot on a Samba share,\ndespite not having DIRECTORY_LIST access rights. (CVE-2015-5299)\n\nMultiple buffer over-read flaws were found in the way Samba handled\nmalformed inputs in certain encodings. An authenticated, remote attacker\ncould possibly use these flaws to disclose portions of the server memory.\n(CVE-2015-5330)\n\nAn access flaw was found in the way Samba verified symbolic links when\ncreating new files on a Samba share. A remote attacker could exploit this\nflaw to gain access to files outside of Samba\u0027s share path. (CVE-2015-5252)\n\nRed Hat would like to thank the Samba project for reporting these issues.\nUpstream acknowledges Stefan Metzmacher of the Samba Team and Sernet.de as\nthe original reporters of CVE-2015-5296, partha@exablox.com as the original\nreporter of CVE-2015-5299, Jan \"Yenya\" Kasprzak and the Computer Systems\nUnit team at Faculty of Informatics, Masaryk University as the original\nreporters of CVE-2015-5252 flaws, and Douglas Bagnall as the original\nreporter of CVE-2015-5330.\n\nAll samba users are advised to upgrade to these updated packages, which\ncontain backported patches to correct these issues. After installing this\nupdate, the smb service will be restarted automatically.",
"title": "Details"
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"title": "Vulnerability description"
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"title": "Vulnerability summary"
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{
"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"
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],
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{
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"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 4.3,
"confidentialityImpact": "NONE",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
"version": "2.0"
},
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"threats": [
{
"category": "impact",
"details": "Low"
}
],
"title": "samba: Insufficient symlink verification in smbd"
},
{
"acknowledgments": [
{
"names": [
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]
},
{
"names": [
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],
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"summary": "Acknowledged by upstream."
},
{
"names": [
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],
"summary": "Acknowledged by upstream."
}
],
"cve": "CVE-2015-5296",
"cwe": {
"id": "CWE-345",
"name": "Insufficient Verification of Data Authenticity"
},
"discovery_date": "2015-12-10T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1290292"
}
],
"notes": [
{
"category": "description",
"text": "A man-in-the-middle vulnerability was found in the way \"connection signing\" was implemented by Samba. A remote attacker could use this flaw to downgrade an existing Samba client connection and force the use of plain text.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "samba: client requesting encryption vulnerable to downgrade attack",
"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": {
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{
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{
"category": "external",
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},
{
"category": "external",
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"date": "2016-01-08T10:17:52+00:00",
"details": "Before applying this update, make sure all previously released errata\nrelevant to your system have been applied.\n\nFor details on how to apply this update, refer to:\n\nhttps://access.redhat.com/articles/11258",
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{
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"version": "2.0"
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{
"category": "impact",
"details": "Moderate"
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],
"title": "samba: client requesting encryption vulnerable to downgrade attack"
},
{
"acknowledgments": [
{
"names": [
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]
},
{
"names": [
"partha@exablox.com"
],
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}
],
"cve": "CVE-2015-5299",
"cwe": {
"id": "CWE-862",
"name": "Missing Authorization"
},
"discovery_date": "2015-10-08T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1276126"
}
],
"notes": [
{
"category": "description",
"text": "A missing access control flaw was found in Samba. A remote, authenticated attacker could use this flaw to view the current snapshot on a Samba share, despite not having DIRECTORY_LIST access rights.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "Samba: Missing access control check in shadow copy code",
"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": {
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},
{
"category": "external",
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},
{
"category": "external",
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"title": "Samba: Missing access control check in shadow copy code"
},
{
"acknowledgments": [
{
"names": [
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]
},
{
"names": [
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],
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}
],
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"cwe": {
"id": "CWE-135",
"name": "Incorrect Calculation of Multi-Byte String Length"
},
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"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1281326"
}
],
"notes": [
{
"category": "description",
"text": "A memory-read flaw was found in the way the libldb library processed LDB DN records with a null byte. An authenticated, remote attacker could use this flaw to read heap-memory pages from the server.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libldb: remote memory read in the Samba LDAP server",
"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"
}
],
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{
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"version": "2.0"
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"7Server-RH-Gluster-3-Samba:samba-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-client-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-client-libs-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-common-0:4.2.4-9.1.el7rhgs.noarch",
"7Server-RH-Gluster-3-Samba:samba-common-libs-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-common-tools-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-dc-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-dc-libs-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-debuginfo-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-devel-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-libs-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-pidl-0:4.2.4-9.1.el7rhgs.noarch",
"7Server-RH-Gluster-3-Samba:samba-python-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-test-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-test-devel-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-test-libs-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-vfs-glusterfs-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-winbind-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-winbind-clients-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-winbind-krb5-locator-0:4.2.4-9.1.el7rhgs.x86_64",
"7Server-RH-Gluster-3-Samba:samba-winbind-modules-0:4.2.4-9.1.el7rhgs.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "libldb: remote memory read in the Samba LDAP server"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
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.