CVE-2018-15919
published 2018-08-28CVE-2018-15919: 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…
PriorityP430medium5.3CVSS 3.1
AVNACLPRNUINSUCLINAN
EPSS
3.56%
87.9th percentile
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.'
Affected
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | openssh | — | — |
| openbsd | openssh | 5.9 – 7.8 | — |
| paloalto | pan-os | — | — |
CVSS provenance
nvdv3.15.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
nvdv3.05.3MEDIUMCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N
osv5.3MEDIUM
vendor_debian5.3LOW
vendor_redhat5.3MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
Palo Alto
PAN-SA-2020-0004 Informational: Third-party or open source vulnerabilities that do not affect PAN-OS
vendor_paloalto·2020-05-13·CVSS 7.5
CVE-2014-1692 [HIGH] PAN-SA-2020-0004 Informational: Third-party or open source vulnerabilities that do not affect PAN-OS
PAN-SA-2020-0004 Informational: Third-party or open source vulnerabilities that do not affect PAN-OS
Palo Alto Networks Product Security Assurance team has evaluated and determined that these third-party or open source vulnerabilities do not have a security impact on PAN-OS, or the scenarios required for successful
CVEs: CVE-2014-1692, CVE-2014-2532, CVE-2014-2653, CVE-2015-5352, CVE-2015-8325, CVE-2016-10009, CVE-2016-10010, CVE-2016-10708, CVE-2016-1908, CVE-2016-3115, CVE-2016-6515, CVE-2018-15473, CVE-2018-15919
Affected products: PAN-OS
Red Hat
openssh: User enumeration via malformed packets in authentication requests
vendor_redhat·2018-08-28·CVSS 5.3
CVE-2018-15919 [MEDIUM] CWE-200 openssh: User enumeration via malformed packets in authentication requests
openssh: User enumeration via malformed packets in authentication requests
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.'
A vulnerability was found in OpenSSH Server, where failed GSSAPI authentication attempts elicit different responses depending on whether the target username exists, a remote attacker could exploit this behavior to enumerate valid usernames on a system, potentially aiding in further attacks. This issue could be leveraged in reconnaissance efforts to identify existing user accounts.
Statement: T
Debian
CVE-2018-15919: openssh - Remotely observable behaviour in auth-gss2.c in OpenSSH through 7.8 could be use...
vendor_debian·2018·CVSS 5.3
CVE-2018-15919 [MEDIUM] CVE-2018-15919: openssh - Remotely observable behaviour in auth-gss2.c in OpenSSH through 7.8 could be use...
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.'
Scope: local
bookworm: open
bullseye: open
forky: open
sid: open
trixie: open
GHSA
GHSA-rj3q-q9f3-gr2v: Remotely observable behaviour in auth-gss2
ghsa_unreviewed·2022-05-14
CVE-2018-15919 [MEDIUM] CWE-200 GHSA-rj3q-q9f3-gr2v: Remotely observable behaviour in auth-gss2
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.'
OSV
CVE-2018-15919: Remotely observable behaviour in auth-gss2
osv·2018-08-28·CVSS 5.3
CVE-2018-15919 [MEDIUM] CVE-2018-15919: Remotely observable behaviour in auth-gss2
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.'
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2018-15919 openssh: User enumeration via malformed packets in authentication requests
bugzilla·2018-08-28·CVSS 5.3
CVE-2018-15919 [MEDIUM] CVE-2018-15919 openssh: User enumeration via malformed packets in authentication requests
CVE-2018-15919 openssh: User enumeration via malformed packets in authentication requests
A flaw was found in OpenSSH versions from 5.9 (September 6, 2011) to the recently released 7.8 (August 24, 2018), inclusive. A remotely observable behaviour in auth-gss2.c could be used by remote attackers to detect existence of users on a target system when GSS2 is in use. Similar to CVE-2018-15473 (it is not a timing attack)
References:
http://seclists.org/oss-sec/2018/q3/180
Discussion:
Created openssh tracking bugs for this issue:
Affects: fedora-all [bug 1623185]
---
Hi everyone, Will this cve be fixed in redhat7 ?
looking for your reply.Thanks.
---
Hi everybody
I didn't find an update for this issue to the RHEL 7.
Is there a fix?
Thanks
---
Is this vulnerability still not fixed? I
Bugzilla
CVE-2018-15919 openssh: User enumeration via malformed packets in authentication requests [fedora-all]
bugzilla·2018-08-28·CVSS 5.3
CVE-2018-15919 [MEDIUM] CVE-2018-15919 openssh: User enumeration via malformed packets in authentication requests [fedora-all]
CVE-2018-15919 openssh: User enumeration via malformed packets in authentication requests [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects mu
2018-08-28
Published