Out-of-bounds Read in GNU Gawk
CVE-2023-4156
A heap out-of-bounds read flaw was found in builtin.c in the gawk package. This issue may lead to a crash and could be used to read sensitive information.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L.
EPSS exploit prediction
EPSS: 0.004 (33.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- GNU Gawk
- Fedora
- Fedoraproject Fedora — versions 38
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux — versions 6.0, 7.0
- Gawk — versions 5.1.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/security/cve/CVE-2023-4156 (Exploit, Third Party Advisory, Release Notes, vdb-entry, Issue Tracking)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Exploit, Third Party Advisory, Release Notes, Issue Tracking)
Frequently asked questions
- What is CVE-2023-4156?
- CVE-2023-4156 is a medium-severity vulnerability in GNU Gawk, classified under Out-of-bounds Read. CVSS score: 4.4/10. Published 2023-09-25.
- How severe is CVE-2023-4156?
- Medium severity. CVSS v3 base score is 4.4 out of 10.
- Is CVE-2023-4156 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.