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CVE-2018-1000654

21
FAUCET Score

CVE-2018-1000654 describes a Denial-of-Service (DoS) vulnerability in GNU Libtasn1 versions 4.12 and 4.13. This flaw allows an attacker to cause 100% CPU utilization, eventually leading to program termination, by parsing a specially crafted file. Rated Medium severity (CVSS 5.5), the attack requires local access and user interaction (parsing the malicious file), with the primary impact being high availability loss. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
4.12CPE matchmatch criteria
cpe:2.3:a:gnu:libtasn1:4.12:*:*:*:*:*:*:*
4.13CPE matchmatch criteria
cpe:2.3:a:gnu:libtasn1:4.13:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

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

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.01%
Probability of exploitation in next 30 days
EPSS Percentile
78.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0201 is in the 89th percentile among its peer group of 5,758 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (6)

redhatvendor investigatingvia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: mingw-libtasn1
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: libtasn1
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libtasn1
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: libtasn1
redhatend of lifevia redhat_api
Product: Red Hat Satellite 6Fixed in: libtasn1
redhatend of lifevia redhat_api
Product: Red Hat Virtualization 4Fixed in: libtasn1

Vendor Advisories (1)

redhatCVE-2018-1000654Low

libtasn1: Infinite loop in _asn1_expand_object_id(ptree) leads to memory exhaustion

Aug 12, 2018

References

lists.opensuse.org / opensuse-security-announce/2019-06/msg00009.html
lists.opensuse.org / opensuse-security-announce/2019-06/msg00018.html
gitlab.com / gnutls/libtasn1/issues/4
ExploitThird Party Advisory
lists.apache.org / thread.html/rf9fa47ab66495c78bb4120b0754dd9531ca2ff0430f6685ac9b07772%40%3Cdev.mina.apache.org%3E
securityfocus.com / bid/105151
Third Party AdvisoryVDB Entry