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CVE-2017-9525

23
FAUCET Score

CVE-2017-9525 is a privilege escalation vulnerability affecting the cron package on Debian and Ubuntu distributions. It allows a highly privileged local attacker to gain root privileges by exploiting a symlink attack against unsafe chown and chmod operations within the postinst maintainer script. With a CVSS score of 6.7 (Medium), this vulnerability has a high impact on confidentiality, integrity, and availability. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.0pl1-128.CPE matchmatch criteria
cpe:2.3:a:cron_project:cron:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.7MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.55%
Probability of exploitation in next 30 days
EPSS Percentile
42.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0055 is in the 92nd percentile among its peer group of 3,720 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

bugs.debian.org / 864466
Issue TrackingThird Party AdvisoryVendor Advisory
lists.debian.org / debian-lts-announce/2019/03/msg00025.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2021/10/msg00029.html
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2017/06/08/3
Mailing ListThird Party Advisory
securitytracker.com / id/1038651
Third Party AdvisoryVDB Entry