CVE-2016-1567
published 2016-01-26CVE-2016-1567: chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to…
PriorityP343high8.1CVSS 3.0
AVNACHPRNUINSUCHIHAH
EPSS
2.64%
83.9th percentile
chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."
Affected
10 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | chrony | < chrony 2.2.1-1 (bookworm) | chrony 2.2.1-1 (bookworm) |
| tuxfamily | chrony | <= 1.31.1 | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | — | — |
| tuxfamily | chrony | >= 0 < 2.2.1-1 | 2.2.1-1 |
| tuxfamily | chrony | >= 0 < 2.2.1-1 | 2.2.1-1 |
| tuxfamily | chrony | >= 0 < 2.2.1-1 | 2.2.1-1 |
| tuxfamily | chrony | >= 0 < 2.2.1-1 | 2.2.1-1 |
CVSS provenance
nvdv3.08.1HIGHCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
nvdv2.06.8MEDIUMAV:N/AC:M/Au:N/C:P/I:P/A:P
osv8.1HIGH
vendor_debian8.1LOW
vendor_redhat8.1HIGH
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Red Hat
chrony: missing key check allows impersonation between authenticated peers (VU#357792)
vendor_redhat·2016-01-20·CVSS 8.1
CVE-2016-1567 [HIGH] CWE-304 chrony: missing key check allows impersonation between authenticated peers (VU#357792)
chrony: missing key check allows impersonation between authenticated peers (VU#357792)
chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."
Statement: Red Hat Product Security has rated this issue as having Low security impact. This issue is not currently planned to be addressed in future updates. For additional information, refer to the Issue Severity Classification: https://access.redhat.com/security/updates/classification/.
Package: chrony (Red Hat Enterprise Linux 6) - Will not fix
Package: chrony (Red Hat Enterprise Linux 7) - Will not fix
Debian
CVE-2016-1567: chrony - chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of sym...
vendor_debian·2016·CVSS 8.1
CVE-2016-1567 [HIGH] CVE-2016-1567: chrony - chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of sym...
chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."
Scope: local
bookworm: resolved (fixed in 2.2.1-1)
bullseye: resolved (fixed in 2.2.1-1)
forky: resolved (fixed in 2.2.1-1)
sid: resolved (fixed in 2.2.1-1)
trixie: resolved (fixed in 2.2.1-1)
GHSA
GHSA-vwxj-hm98-qj7v: chrony before 1
ghsa_unreviewed·2022-05-17
CVE-2016-1567 [HIGH] GHSA-vwxj-hm98-qj7v: chrony before 1
chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."
OSV
CVE-2016-1567: chrony before 1
osv·2016-01-26·CVSS 8.1
CVE-2016-1567 [HIGH] CVE-2016-1567: chrony before 1
chrony before 1.31.2 and 2.x before 2.2.1 do not verify peer associations of symmetric keys when authenticating packets, which might allow remote attackers to conduct impersonation attacks via an arbitrary trusted key, aka a "skeleton key."
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2016-1567 chrony: missing key check allows impersonation between authenticated peers (VU#357792) [epel-all]
bugzilla·2016-01-20·CVSS 8.1
CVE-2016-1567 [HIGH] CVE-2016-1567 chrony: missing key check allows impersonation between authenticated peers (VU#357792) [epel-all]
CVE-2016-1567 chrony: missing key check allows impersonation between authenticated peers (VU#357792) [epel-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 EPEL.
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
Bugzilla
CVE-2016-1567 chrony: missing key check allows impersonation between authenticated peers (VU#357792) [fedora-all]
bugzilla·2016-01-20·CVSS 8.1
CVE-2016-1567 [HIGH] CVE-2016-1567 chrony: missing key check allows impersonation between authenticated peers (VU#357792) [fedora-all]
CVE-2016-1567 chrony: missing key check allows impersonation between authenticated peers (VU#357792) [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.
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 aff
Bugzilla
CVE-2016-1567 chrony: missing key check allows impersonation between authenticated peers (VU#357792)
bugzilla·2016-01-11·CVSS 8.1
CVE-2016-1567 [HIGH] CVE-2016-1567 chrony: missing key check allows impersonation between authenticated peers (VU#357792)
CVE-2016-1567 chrony: missing key check allows impersonation between authenticated peers (VU#357792)
The following flaw was found in chrony:
Symmetric key encryption requires a single trusted key to be specified for each server configuration. A key specified only for one server should only work to authenticate that server, other trusted keys should be refused.
However, when symmetric key authentication is verified, there is no check that the key used is the key specified for the address, any trusted key can be used as long as the keyid references another key the systems share and that key is used to compute the MAC.
An authenticated client (A) could use this flaw to modify a packet sent between a server (B) and a client (C) using a key that is different from the one known to the client
http://chrony.tuxfamily.org/news.html#_20_jan_2016_chrony_2_2_1_and_chrony_1_31_2_releasedhttp://lists.fedoraproject.org/pipermail/package-announce/2016-February/176559.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2016-January/175969.htmlhttp://www.talosintel.com/reports/TALOS-2016-0071/http://chrony.tuxfamily.org/news.html#_20_jan_2016_chrony_2_2_1_and_chrony_1_31_2_releasedhttp://lists.fedoraproject.org/pipermail/package-announce/2016-February/176559.htmlhttp://lists.fedoraproject.org/pipermail/package-announce/2016-January/175969.htmlhttp://www.talosintel.com/reports/TALOS-2016-0071/
2016-01-26
Published