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CVE-2018-1000637

25
FAUCET Score

CVE-2018-1000637 is a buffer overflow vulnerability in zutils versions prior to 1.8-pre2, specifically affecting the zcat utility, impacting Debian and Nongnu zutils distributions. This high-severity flaw (CVSS 7.8) can lead to denial of service or arbitrary code execution when a victim opens a specially crafted compressed file. While the vulnerability is fixed in version 1.8-pre2, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 1.8CPE matchmatch criteria
cpe:2.3:a:nongnu:zutils:*:*:*:*:*:*:*:*
1.8CPE matchmatch criteria
cpe:2.3:a:nongnu:zutils:1.8:pre1:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.8HIGH

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
1.68%
Probability of exploitation in next 30 days
EPSS Percentile
74.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0168 is in the 73rd percentile among its peer group of 11,617 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

bugs.debian.org / 904819
Issue TrackingMailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2018/09/msg00016.html
Mailing ListThird Party Advisory
lists.nongnu.org / archive/html/zutils-bug/2018-08/msg00000.html
Mailing ListThird Party Advisory