CVE-2018-6198: canonical ubuntu_linux Link Following
CVSS: 4.7v3.0MediumModified
AliasesALPINE-CVE-2018-6198UBUNTU-CVE-2018-6198DEBIAN-CVE-2018-6198
Published 25-01-2018Last modified 05-08-2024
Vulnerability summary
CVE-2018-6198 is a medium (CVSS 4.7) Link Following vulnerability in canonical ubuntu_linux. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 32.1% of scored vulnerabilities.
CVSS score
4.7/10
010
Medium · v3.0 (NVD)EPSS score
0.40%
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 4 · Related 3Timeline
- 25-01-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
w3m through 0.5.3 does not properly handle temporary files when the ~/.w3m directory is unwritable, which allows a local attacker to craft a symlink attack to overwrite arbitrary files.
CVSS metrics
5 scores · 4 sources · 2 versionsMedium 4.7Preferred score · NVD (NIST)
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:NSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated4.7MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
- OSV · UbuntuEcosystem advisory · calculated4.7MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
- OSV · DebianEcosystem advisory · calculated4.7MediumCVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
Low 3.3Preferred score · NVD (NIST)
AV:L/AC:M/Au:N/C:N/I:P/A:PSourcesSingle source
EPSS trend
Probability
0.40%
Chance of exploitation in the next 30 days
Percentile
32%
Versus all other CVEs
30-day change
0.00 pp
From 0.40% on 19-09-2026
19-09-202619-10-2026
EPSS score0.40%
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
- w3m< 0.5.3_git20241203-r0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04 | 17.10
Debian1 product
- w3m< 0.5.3-36
Tats1 product
- w3m≤ 0.5.3
Ubuntu1 product
- w3m< 0.5.3-15ubuntu0.2 | < 0.5.3-26ubuntu0.2
5 vendors · 5 products
References
13 links
- github.com/tats/w3m/commit/18dcbadf2771cdb0c18509b14e4e73505b242753X Refsource CONFIRMPatchThird Party AdvisoryREPORT
- salsa.debian.org/debian/w3m/commit/18dcbadf2771cdb0c18509b14e4e73505b242753X Refsource CONFIRMPatchThird Party AdvisoryREPORT