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Fencer Vulns
medium 5.0

CVE-2006-4790 json

verify.c in GnuTLS before 1.4.4, when using an RSA key with exponent 3, does not properly handle excess data in the digestAlgorithm.paramet…

published 2006-09-14 20 y ago modified 2026-06-16 4 mo ago also EUVD-2006-4777

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.6%
EPSS 2.6% chance of exploitation in 30 days, percentile 85%
public exploits
0
none known

Summary

verify.c in GnuTLS before 1.4.4, when using an RSA key with exponent 3, does not properly handle excess data in the digestAlgorithm.parameters field when generating a hash, which allows remote attackers to forge a PKCS #1 v1.5 signature that is signed by that RSA key and prevents GnuTLS from correctly verifying X.509 and other certificates that use PKCS, a variant of CVE-2006-4339.

Patch / fix

  • gnutls RHEL 4 1.0.20-3.2.3

red hat advisories RHSA-2006:0680

  • gnutls openSUSE Tumbleweed 3.7.2-1.2

opensuse advisories openSUSE-SU-2024:10801-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2006-4790 updated

security flaw

  • Red Hat Enterprise Linux AS version 4 gnutls 1.0.20-3.2.3 Red Hat Enterprise Linux Desktop version 4 gnutls 1.0.20-3.2.3 Red Hat Enterprise Linux ES version 4 gnutls 1.0.20-3.2.3 Red Hat Enterprise Linux WS version 4 gnutls 1.0.20-3.2.3
    fixed: vendor fix RHSA-2006:0680

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.56% chance of exploitation in the next 30 days, higher than 85% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.