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CVE-2018-6003

25
FAUCET Score

CVE-2018-6003 describes a denial-of-service vulnerability in GNU Libtasn1 versions prior to 4.13, specifically within the _asn1_decode_simple_ber function. This flaw allows an attacker to trigger unlimited recursion in the BER decoder, leading to stack exhaustion and a system crash. With a CVSS score of 7.5 (High), this vulnerability is easily exploitable over the network with low attack complexity, requiring no user interaction. While no active exploitation, public exploit code, or significant community discussion has been observed, affected products include various Debian and Fedora distributions utilizing Libtasn1.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.12CPE matchmatch criteria
cpe:2.3:a:gnu:libtasn1:*:*:*:*:*:*:*:*
9.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
26CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:26:*:*:*:*:*:*:*
27CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:27:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.83%
Probability of exploitation in next 30 days
EPSS Percentile
85.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0283 is in the 73rd percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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 (2)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: libtasn1
redhatend of lifevia redhat_api
Product: Red Hat Satellite 6Fixed in: libtasn1

Vendor Advisories (1)

redhatCVE-2018-6003Moderate

libtasn1: Stack exhaustion due to indefinite recursion during BER decoding

Jan 4, 2018

References

git.savannah.nongnu.org / cgit/libtasn1.git/commit
PatchVendor Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
bugzilla.suse.com / show_bug.cgi
Issue TrackingThird Party Advisory
gitlab.com / gnutls/libtasn1/commit/946565d8eb05fbf7970ea366e817581bb5a90910
Third Party Advisory
lists.apache.org / thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
lists.apache.org / thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
debian.org / security/2018/dsa-4106
Third Party Advisory