CVE-2019-3464: canonical ubuntu_linux Improper Initialization
CVSS: 9.8v3.1CriticalModified
AliasesALPINE-CVE-2019-3464UBUNTU-CVE-2019-3464
Published 06-02-2019Last modified 17-09-2024
Vulnerability summary
CVE-2019-3464 is a critical (CVSS 9.8) Improper Initialization vulnerability in canonical ubuntu_linux. EPSS estimates a 4.70% chance of exploitation in the next 30 days, higher than 91.7% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.1 (NVD)EPSS score
4.70%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 3 · Related 1Timeline
- 06-02-2019PublishedVulnerability first disclosed.
- 17-09-2024Last modifiedVulnerability information updated.
Description
Insufficient sanitization of environment variables passed to rsync can bypass the restrictions imposed by rssh, a restricted shell that should restrict users to perform only rsync operations, resulting in the execution of arbitrary shell commands.
CVSS metrics
5 scores · 3 sources · 3 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Critical 9.8Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesSingle source
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
4.70%
Chance of exploitation in the next 30 days
Percentile
92%
Versus all other CVEs
30-day change
0.00 pp
From 4.70% on 21-09-2026
21-09-202621-10-2026
EPSS score4.70%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Alpine1 product
- rssh< 2.3.4-r1
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 18.10
Debian1 product
- debian_linuxEOL8.0 | 9.0
Debian gnu/linux1 product
- rsshAll versions before 2.3.4-5+deb9u2 and 2.3.4-10
Fedoraproject1 product
- fedoraEOL29 | 30 | 31
Pizzashack1 product
- rssh2.3.4
Ubuntu1 product
- rssh< 2.3.4-4+deb8u2ubuntu0.14.04.2 | < 2.3.4-4+deb8u2ubuntu0.16.04.2 | < 2.3.4-7ubuntu0.1
7 vendors · 7 products
References
14 links
- lists.debian.org/debian-lts-announce/2019/02/msg00007.htmlMailing ListX Refsource MLISTThird Party Advisory
- tracker.debian.org/news/1026713/accepted-rssh-234-5deb9u2-source-amd64-into-stable-embargoed-stable/X Refsource MISCREPORTMailing ListThird Party Advisory
- seclists.org/fulldisclosure/2021/May/78Mailing ListX Refsource FULLDISCNot ApplicableThird Party Advisory