Vulnerability-Lookup

SUSE-SU-2018:3781-1

Vulnerability from csaf_suse - Published: 2018-11-16 15:03 - Updated: 2018-11-16 15:03

Summary

Security update for openssh

Severity

Moderate

Notes

Title of the patch: Security update for openssh

Description of the patch: This update for openssh fixes the following issues: Following security issues have been fixed: - CVE-2018-15919: Remotely observable behaviour in auth-gss2.c in OpenSSH could be used by remote attackers to detect existence of users on a target system when GSS2 is in use. OpenSSH developers do not want to treat such a username enumeration (or 'oracle') as a vulnerability. (bsc#1106163) - CVE-2018-15473: OpenSSH was prone to a user existance oracle 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. (bsc#1105010) Also the following security related hardening change was done: - Removed arcfour,blowfish,cast from list of default ciphers as they are long discontinued and should no longer be used. (bsc#982273) And the following non-security issues were fixed: - Stop leaking File descriptors (bsc#964336) - sftp-client.c returns wrong error code upon failure (bsc#1091396)

Patchnames: slessp4-openssh-13867

CVE-2018-15473

5.3 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Affected products

Recommended 40 products

Product	Version	Remediation
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-6.6p1-36.6.1.i586	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-6.6p1-36.6.1.ia64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-6.6p1-36.6.1.ppc64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-6.6p1-36.6.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-6.6p1-36.6.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-askpass-gnome-6.6p1-36.6.1.i586	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-askpass-gnome-6.6p1-36.6.1.ia64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-askpass-gnome-6.6p1-36.6.1.ppc64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-askpass-gnome-6.6p1-36.6.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-askpass-gnome-6.6p1-36.6.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-fips-6.6p1-36.6.1.i586	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-fips-6.6p1-36.6.1.ia64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-fips-6.6p1-36.6.1.ppc64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-fips-6.6p1-36.6.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-fips-6.6p1-36.6.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-helpers-6.6p1-36.6.1.i586	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-helpers-6.6p1-36.6.1.ia64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-helpers-6.6p1-36.6.1.ppc64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-helpers-6.6p1-36.6.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server 11 SP4:openssh-helpers-6.6p1-36.6.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-6.6p1-36.6.1.i586	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-6.6p1-36.6.1.ia64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-6.6p1-36.6.1.ppc64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-6.6p1-36.6.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-6.6p1-36.6.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-askpass-gnome-6.6p1-36.6.1.i586	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-askpass-gnome-6.6p1-36.6.1.ia64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-askpass-gnome-6.6p1-36.6.1.ppc64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-askpass-gnome-6.6p1-36.6.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-askpass-gnome-6.6p1-36.6.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-fips-6.6p1-36.6.1.i586	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-fips-6.6p1-36.6.1.ia64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-fips-6.6p1-36.6.1.ppc64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-fips-6.6p1-36.6.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-fips-6.6p1-36.6.1.x86_64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-helpers-6.6p1-36.6.1.i586	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-helpers-6.6p1-36.6.1.ia64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-helpers-6.6p1-36.6.1.ppc64	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-helpers-6.6p1-36.6.1.s390x	—	Vendor Fix
Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 11 SP4:openssh-helpers-6.6p1-36.6.1.x86_64	—	Vendor Fix

Threats

Impact moderate

References

16 references

URL	Category
https://www.suse.com/support/security/rating/	external
https://ftp.suse.com/pub/projects/security/csaf/s…	self
https://www.suse.com/support/update/announcement/…	self
https://lists.suse.com/pipermail/sle-security-upd…	self
https://bugzilla.suse.com/1091396	self
https://bugzilla.suse.com/1105010	self
https://bugzilla.suse.com/1106163	self
https://bugzilla.suse.com/964336	self
https://bugzilla.suse.com/982273	self
https://www.suse.com/security/cve/CVE-2018-15473/	self
https://www.suse.com/security/cve/CVE-2018-15473	external
https://bugzilla.suse.com/1105010	external
https://bugzilla.suse.com/1106163	external
https://bugzilla.suse.com/1123133	external
https://bugzilla.suse.com/1138392	external
https://bugzilla.suse.com/1205621	external

JSON

To clipboard

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        "text": "This update for openssh fixes the following issues:\n\nFollowing security issues have been fixed:\n\n- CVE-2018-15919: Remotely observable behaviour in auth-gss2.c in OpenSSH could be used by remote attackers to detect existence of users on a target system when GSS2 is in use. OpenSSH developers do not want to treat such a username enumeration (or \u0027oracle\u0027) as a vulnerability. (bsc#1106163)\n- CVE-2018-15473: OpenSSH was prone to a user existance oracle 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. (bsc#1105010)\n\nAlso the following security related hardening change was done:\n\n- Removed arcfour,blowfish,cast from list of default ciphers as they are long discontinued and should no longer be used. (bsc#982273)\n\nAnd the following non-security issues were fixed:\n\n- Stop leaking File descriptors (bsc#964336)\n- sftp-client.c returns wrong error code upon failure (bsc#1091396)\n\n",
        "title": "Description of the patch"
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2018-11-16T15:03:11Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2018-15473"
    }
  ]
}

CVE-2018-15473 (GCVE-0-2018-15473)

Vulnerability from cvelistv5 – Published: 2018-08-17 00:00 – Updated: 2025-12-17 21:22

Summary

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.

Severity

5.9 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-12-17 21:22 UTC

CWE

n/a
CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Assigner

mitre mitre root

References

18 references

URL	Tags
https://security.gentoo.org/glsa/201810-03	vendor-advisory
http://www.securitytracker.com/id/1041487	vdb-entry
https://www.exploit-db.com/exploits/45233/	exploit
https://bugs.debian.org/906236
https://www.exploit-db.com/exploits/45210/	exploit
https://security.netapp.com/advisory/ntap-2018110…
https://github.com/openbsd/src/commit/779974d35b4…
https://usn.ubuntu.com/3809-1/	vendor-advisory
https://lists.debian.org/debian-lts-announce/2018…	mailing-list
http://www.securityfocus.com/bid/105140	vdb-entry
https://www.debian.org/security/2018/dsa-4280	vendor-advisory
https://www.exploit-db.com/exploits/45939/	exploit
https://psirt.global.sonicwall.com/vuln-detail/SN…
http://www.openwall.com/lists/oss-security/2018/08/15/5
https://access.redhat.com/errata/RHSA-2019:0711	vendor-advisory
https://access.redhat.com/errata/RHSA-2019:2143	vendor-advisory
https://www.oracle.com/security-alerts/cpujan2020.html
https://cert-portal.siemens.com/productcert/pdf/s…

Date Public

2018-08-17 00:00

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.