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CVE-2006-0645

20
FAUCET Score

CVE-2006-0645 describes an out-of-bounds access vulnerability in Tiny ASN.1 Library (libtasn1) versions prior to 0.2.18, impacting applications like GnuTLS and GNU Shishi. This flaw, triggered by invalid input during DER decoding, can lead to a denial of service and potentially arbitrary code execution. With a CVSS score of 7.5, it is considered highly severe due to its network-based attack vector, low attack complexity, and potential for partial confidentiality, integrity, and availability impacts. There is no evidence of active exploitation, public exploit code, or Metasploit/Nuclei modules, and community discussion and media coverage are minimal, suggesting low current attention.

Impacted Technologies

VendorProductVersion(s)CPE
0.1.0CPE matchmatch criteria
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.1.0:*:*:*:*:*:*:*
0.1.1CPE matchmatch criteria
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.1.1:*:*:*:*:*:*:*
0.1.2CPE matchmatch criteria
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.1.2:*:*:*:*:*:*:*
0.2.0CPE matchmatch criteria
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.2.0:*:*:*:*:*:*:*
0.2.1CPE matchmatch criteria
cpe:2.3:a:free_software_foundation_inc.:libtasn1:0.2.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.51%
Probability of exploitation in next 30 days
EPSS Percentile
88.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0351 is in the 79th percentile among its peer group of 51,506 CVEs.

Social Chatter

No social media mentions found for this CVE.

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

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

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: gnutls-0:1.0.20-3.2.2
View patch

Vendor Advisories (1)

redhatCVE-2006-0645Important

- libtasn1 buffer overflow

Feb 9, 2006

References

josefsson.org / cgi-bin/viewcvs.cgi/gnutls/tests/certder.c
josefsson.org / cgi-bin/viewcvs.cgi/libtasn1/NEWS
josefsson.org / gnutls/releases/libtasn1/libtasn1-0.2.18-from-0.2.17.patch
lists.gnupg.org / pipermail/gnutls-dev/2006-February/001058.html
lists.gnupg.org / pipermail/gnutls-dev/2006-February/001059.html
lists.gnupg.org / pipermail/gnutls-dev/2006-February/001060.html
rhn.redhat.com / errata/RHSA-2006-0207.html
secunia.com / advisories/18794
secunia.com / advisories/18815
secunia.com / advisories/18830
secunia.com / advisories/18832
secunia.com / advisories/18898
secunia.com / advisories/18918
secunia.com / advisories/19080
secunia.com / advisories/19092
securityreason.com / securityalert/446
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/24606
oval.cisecurity.org / repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10540
usn.ubuntu.com / 251-1
debian.org / security/2006/dsa-985
debian.org / security/2006/dsa-986
gentoo.org / security/en/glsa/glsa-200602-08.xml
gleg.net / protover_ssl.shtml
mandriva.com / security/advisories
osvdb.org / 23054
redhat.com / archives/fedora-announce-list/2006-February/msg00043.html
securityfocus.com / archive/1/424538/100/0/threaded
securityfocus.com / bid/16568
trustix.org / errata/2006/0008
vupen.com / english/advisories/2006/0496