Out-of-bounds Read in GNU Tar
CVE-2021-20193
A flaw was found in the src/list.c of tar 1.33 and earlier. This flaw allows an attacker who can submit a crafted input file to tar to cause uncontrolled consumption of memory. The highest threat from this vulnerability is to system availability.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.011 (65.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 65.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000
Affected products
- GNU Tar
- Tar — versions 1.33 and earlier
Weakness classification (CWE)
Public proof-of-concept exploits
References
- bugzilla.redhat.com/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- savannah.gnu.org/bugs/ (Patch, Issue Tracking, Vendor Advisory)
- git.savannah.gnu.org/cgit/tar.git/commit/ (Patch, Mailing List, Third Party Advisory)
- security.gentoo.org/glsa/202105-29 (vendor-advisory, Third Party Advisory)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2021-20193?
- CVE-2021-20193 is a low-severity vulnerability in GNU Tar, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 3.3/10. Published 2021-03-26.
- How severe is CVE-2021-20193?
- Low severity. CVSS v3 base score is 3.3 out of 10.
- Is CVE-2021-20193 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.