7.5

CVE-2018-1061: canonical ubuntu_linux Improper Input Validation

Modified
AliasesALPINE-CVE-2018-1061UBUNTU-CVE-2018-1061DEBIAN-CVE-2018-1061
Published 19-06-2018Last modified 15-10-2026

Vulnerability summary

CVE-2018-1061 is a high (CVSS 7.5) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 4.74% chance of exploitation in the next 30 days, higher than 91.8% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.0 (NVD)
EPSS score
4.74%
0%100%
Low · -0.17 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 22 · Related 11
DLA-1519-1DLA-1520-1DSA-4306-1DSA-4307-1MGASA-2018-0256MGASA-2018-0270

Timeline

  1. 19-06-2018
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

python before versions 2.7.15, 3.4.9, 3.5.6rc1, 3.6.5rc1 and 3.7.0 is vulnerable to catastrophic backtracking in the difflib.IS_LINE_JUNK method. An attacker could use this flaw to cause denial of service.

CVSS metrics

6 scores · 5 sources · 2 versions

EPSS trend

Probability

4.74%

Chance of exploitation in the next 30 days

Percentile

92%

Versus all other CVEs

30-day change

Decrease -0.17 pp

From 4.92% on 05-10-2026

05-10-202604-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.

Redhat4 products
Alpine3 products
  • python2< 2.7.15-r0
  • python2-tkinter< 2.7.15-r0
  • python3< 3.5.6-r0 | < 3.6.5-r0 | < 3.6.6-r0
Ubuntu3 products
  • python2.7< 2.7.6-8ubuntu0.5 | < 2.7.12-1ubuntu0~16.04.4
  • python3.4< 3.4.3-1ubuntu1~14.04.7
  • python3.5< 3.5.2-2ubuntu0~16.04.4~14.04.1+esm1 | < 3.5.2-2ubuntu0~16.04.5
Debian2 products
[unknown]1 product
  • pythonpython 2.7.15 | python 3.4.9 | python 3.5.6 | python 3.7.0
Canonical1 product
Fedoraproject1 product
Python1 product
  • pythonEOL< 2.7.15 | ≥ 3.0, < 3.4.9 | ≥ 3.5.0, ≤ 3.5.5 | ≥ 3.6, ≤ 3.6.4 | 3.7.0:alpha1 | 3.7.0:alpha2 | 3.7.0:alpha3 | 3.7.0:alpha4 | 3.7.0:beta1 | 3.7.0:beta2 | 3.7.0:beta3 | 3.7.0:beta4 | 3.7.0:beta5 | 3.7.0:rc1

8 vendors · 16 products

References

28 links
Show all 28 references