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Vulnerability Details : CVE-2018-20482

GNU Tar through 1.30, when --sparse is used, mishandles file shrinkage during read access, which allows local users to cause a denial of service (infinite read loop in sparse_dump_region in sparse.c) by modifying a file that is supposed to be archived by a different user's process (e.g., a system backup running as root).
Publish Date : 2018-12-26 Last Update Date : 2019-04-26
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- CVSS Scores & Vulnerability Types

CVSS Score
1.9
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Partial (There is reduced performance or interruptions in resource availability.)
Access Complexity Medium (The access conditions are somewhat specialized. Some preconditions must be satistified to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 125

- Products Affected By CVE-2018-20482

# Product Type Vendor Product Version Update Edition Language
1 OS Debian Debian Linux 8.0 Version Details Vulnerabilities
2 Application GNU TAR 1.30 Version Details Vulnerabilities
3 OS Opensuse Leap 15.0 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Debian Debian Linux 1
GNU TAR 1
Opensuse Leap 1

- References For CVE-2018-20482

https://news.ycombinator.com/item?id=18745431
http://lists.gnu.org/archive/html/bug-tar/2018-12/msg00023.html
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00077.html
SUSE openSUSE-SU-2019:1237
http://git.savannah.gnu.org/cgit/tar.git/commit/?id=c15c42ccd1e2377945fd0414eca1a49294bff454
https://security.gentoo.org/glsa/201903-05
GENTOO GLSA-201903-05
https://lists.debian.org/debian-lts-announce/2018/12/msg00023.html
MLIST [debian-lts-announce] 20181231 [SECURITY] [DLA 1623-1] tar security update
https://utcc.utoronto.ca/~cks/space/blog/sysadmin/TarFindingTruncateBug
https://twitter.com/thatcks/status/1076166645708668928
http://www.securityfocus.com/bid/106354
BID 106354 GNU Tar CVE-2018-20482 Denial of Service Vulnerability Release Date:2018-12-27

- Metasploit Modules Related To CVE-2018-20482

There are not any metasploit modules related to this CVE entry (Please visit www.metasploit.com for more information)


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