CVE-2018-10858: canonical ubuntu_linux Improper Input Validation
Vulnerability summary
CVE-2018-10858 is a high (CVSS 8.8) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 4.30% chance of exploitation in the next 30 days, higher than 91.1% of scored vulnerabilities.
Not severe (CVSS 4.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 13 · Related 6Timeline
- 22-08-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
A heap-buffer overflow was found in the way samba clients processed extra long filename in a directory listing. A malicious samba server could use this flaw to cause arbitrary code execution on a samba client. Samba versions before 4.6.16, 4.7.9 and 4.8.4 are vulnerable.
CVSS metrics
6 scores · 5 sources · 2 versions- CVE.orgCNA4.3MediumCVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:LDiffers
- OSV · AlpineEcosystem advisory · calculated8.8HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated4.3MediumCVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:LDiffers
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
4.30%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
No change 0.00 pp
From 4.30% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferThe product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary.
Affected systems
Known conditions: network-reachable, administrative account, user interaction (CVSS vector). Other conditions: not stated in public data.
Suse23 products
- samba-doc&distro=SUSE Linux Enterprise Point of Sale 11 SP3< 3.6.3-94.14.2
- samba-doc&distro=SUSE Linux Enterprise Server 11 SP3-LTSS< 3.6.3-94.14.2
- samba-doc&distro=SUSE Linux Enterprise Server 11 SP3-TERADATA< 3.6.3-94.14.2
- samba-doc&distro=SUSE Linux Enterprise Server 11 SP4< 3.6.3-94.14.2
- samba-doc&distro=SUSE Linux Enterprise Server for SAP Applications 11 SP4< 3.6.3-94.14.2
Redhat5 products
Debian2 products
- samba< 2:4.8.4+dfsg-1
- debian_linuxEOL9.0
Alpine1 product
- samba≥ 4.7.0, < 4.8.4-r0 | ≥ 4.7.0, < 4.5.16-r1 | ≥ 4.7.0, < 4.6.16-r0 | ≥ 4.7.0, < 4.7.6-r1
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04
Samba1 product
- samba< 4.6.16 | ≥ 4.7.0, < 4.7.9 | ≥ 4.8.0, < 4.8.4
The samba team1 product
- sambaEOL4.6.16 | 4.7.9 | 4.8.4
Ubuntu1 product
- samba< 2:4.3.11+dfsg-0ubuntu0.14.04.16 | < 2:4.3.11+dfsg-0ubuntu0.16.04.15 | < 2:4.7.6+dfsg~ubuntu-0ubuntu2.2
8 vendors · 35 products
References
29 links
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10858X Refsource CONFIRMIssue TrackingThird Party Advisory
Show all 29 references
- kc.mcafee.com/corporate/index?page=content&id=SB10284X Refsource CONFIRM