Auth bypass in Shadow-Maint Shadow-Utils
CVE-2023-4641
A flaw was found in shadow-utils. When asking for a new password, shadow-utils asks the password twice. If the password fails on the second attempt, shadow-utils fails in cleaning the buffer used to store the first entry. This may allow an attacker with enough access to retrieve the password from the memory.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.003 (17.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Shadow-Maint Shadow-Utils
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8 — versions 2:4.6-19.el8
- Red Hat Enterprise Linux 8.6 Extended Update Support — versions 2:4.6-17.el8_6
- Red Hat Enterprise Linux 8.8 Extended Update Support — versions 2:4.6-17.el8_8.2
- Red Hat Enterprise Linux 9 — versions 2:4.9-8.el9
- Red Hat Codeready Linux Builder — versions 8.0, 9.0
- Red Hat Codeready Linux Builder For Arm64 — versions 8.0_aarch64, 9.0_aarch64
- Red Hat Codeready Linux Builder For IBM Z Systems — versions 8.0_s390x, 9.0_s390x
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2023:6632 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2023:7112 (vendor-advisory, Third Party Advisory)
- access.redhat.com/errata/RHSA-2024:0417 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:2577 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2023-4641 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking)
- af854a3a-2127-422b-91ae-364da2661108
Frequently asked questions
- What is CVE-2023-4641?
- CVE-2023-4641 is a medium-severity vulnerability in Shadow-Maint Shadow-Utils, classified under Incorrect Implementation of Authentication Algorithm. CVSS score: 4.7/10. Published 2023-12-27.
- How severe is CVE-2023-4641?
- Medium severity. CVSS v3 base score is 4.7 out of 10.
- Is CVE-2023-4641 known to be exploited?
- 9 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.