Vulnerability in Rpm
CVE-2021-35939
It was found that the fix for CVE-2017-7500 and CVE-2017-7501 was incomplete: the check was only implemented for the parent directory of the file to be created. A local unprivileged user who owns another ancestor directory could potentially use this flaw to gain root privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.005 (40.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 41st percentile — 40.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: -0.000
Affected products
- Rpm
- Red Hat Enterprise Linux — versions 8.0
- Rpm — versions Fixed in RPM-v4.18
Weakness classification (CWE)
Public proof-of-concept exploits
References
- rpm.org/wiki/Releases/4.18.0 (Release Notes, Vendor Advisory)
- github.com/rpm-software-management/rpm/pull/1919 (Patch, Third Party Advisory)
- bugzilla.redhat.com/show_bug.cgi (Exploit, Third Party Advisory, Issue Tracking)
- github.com/rpm-software-management/rpm/commit/96ec957e281220f8e137a2d5eb23b83a6… (Patch, Third Party Advisory)
- access.redhat.com/security/cve/CVE-2021-35939 (Third Party Advisory)
- security.gentoo.org/glsa/202210-22 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-35939?
- CVE-2021-35939 is a medium-severity vulnerability in Rpm, classified under Improper Link Resolution Before File Access. CVSS score: 6.7/10. Published 2022-08-26.
- How severe is CVE-2021-35939?
- Medium severity. CVSS v3 base score is 6.7 out of 10.
- Is CVE-2021-35939 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.