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CVE-2012-4503

21
FAUCET Score

CVE-2012-4503 describes an information disclosure vulnerability in Chrony versions prior to 1.29, specifically affecting the cmdmon.c component. Attackers can remotely obtain potentially sensitive stack memory data by sending crafted RPY_SUBNETS_ACCESSED or RPY_CLIENT_ACCESSES commands, leading to uninitialized data being included in replies. With a CVSS score of 5.0 (AV:N/AC:L/Au:N/C:P/I:N/A:N), this vulnerability is of medium severity, requiring no authentication and having a low attack complexity, but only impacts confidentiality. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.28CPE matchmatch criteria
cpe:2.3:a:tuxfamily:chrony:*:*:*:*:*:*:*:*
1.0CPE matchmatch criteria
cpe:2.3:a:tuxfamily:chrony:1.0:*:*:*:*:*:*:*
1.1CPE matchmatch criteria
cpe:2.3:a:tuxfamily:chrony:1.1:*:*:*:*:*:*:*
1.18CPE matchmatch criteria
cpe:2.3:a:tuxfamily:chrony:1.18:*:*:*:*:*:*:*
1.19CPE matchmatch criteria
cpe:2.3:a:tuxfamily:chrony:1.19:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:P/I:N/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.08%
Probability of exploitation in next 30 days
EPSS Percentile
86.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0308 is in the 81st percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

redhatCVE-2012-4503Moderate

chrony: Two security flaws fixed in chrony-1.29 release

Aug 9, 2013

References

git.tuxfamily.org / chrony/chrony.git
permalink.gmane.org / gmane.comp.time.chrony.announce/15
Vendor Advisory
bugzilla.redhat.com / show_bug.cgi
seclists.org / oss-sec/2013/q3/332
Patch
debian.org / security/2013/dsa-2760