CVE-2018-1000654

Exp

GNU Libtasn1-4.13 libtasn1-4.13 version libtasn1-4.13, libtasn1-4.12 contains a DoS, specifically CPU usage will reach 100% when running asn1Paser against the POC due to an issue in _asn1_expand_object_id(p_tree), after a long time, the program will be killed. This attack appears to be exploitable via parsing a crafted file.

Published: 2018-08-20 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-1000654 is rated Exploit Available (50/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.12%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-1000654

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-1000654

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.18% 0.12% -0.06%
2 2025-11-18 0.07% 0.18% +0.11%
3 2025-03-17 — 0.07% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-1000654

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.0 MEDIUM
CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 [email protected]
7.1 2.0 HIGH
AV:N/AC:M/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 6.9 [email protected]

Weakness enumeration for CVE-2018-1000654

OS Trackers for CVE-2018-1000654

vendor priority summary link
alpine medium CVE-2018-1000654: 1 source package rows (libtasn1); 20 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 10. https://security.alpinelinux.org/vuln/CVE-2018-1000654
debian unimportant CVE-2018-1000654 unimportant priority: Debian including 1 source packages (libtasn1-6), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2018-1000654
redhat low — https://access.redhat.com/security/cve/CVE-2018-1000654
suse medium CVE-2018-1000654 severity moderate: SUSE including 551 source package names (0.0.17-1.1:libtasn1-4.13-4.5.1, 0.0.17-1.1:libtasn1-6-4.13-4.5.1, …), 1322 product×package rows across 503 product lines (Container bci/kiwi, Container bci/openjdk, … (503 product lines)): Fixed 1165, Known Affected 157. https://www.suse.com/security/cve/CVE-2018-1000654/
ubuntu negligible CVE-2018-1000654 negligible priority: Ubuntu including 2 source packages (libtasn1-3, libtasn1-6), 38 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 18, not-affected 10, ignored 5, needs-triage 3, released 2. https://ubuntu.com/security/CVE-2018-1000654

Affected software / configurations for CVE-2018-1000654

Vendor Product Version Raw CPE
gnu libtasn1 4.12 cpe:2.3:a:gnu:libtasn1:4.12:*:*:*:*:*:*:*
gnu libtasn1 4.13 cpe:2.3:a:gnu:libtasn1:4.13:*:*:*:*:*:*:*

References for CVE-2018-1000654

cvelogic Threat Intelligence