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Fencer Intel
medium 4.0

CVE-2010-4334 json

The IO::Socket::SSL module 1.35 for Perl, when verify_mode is not VERIFY_NONE, fails open to VERIFY_NONE instead of throwing an error when…

published 15y ago modified 4mo ago also EUVD-2010-4306

cvss
4.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.8%
EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits
0
none known

Summary

The IO::Socket::SSL module 1.35 for Perl, when verify_mode is not VERIFY_NONE, fails open to VERIFY_NONE instead of throwing an error when a ca_file/ca_path cannot be verified, which allows remote attackers to bypass intended certificate restrictions.

Patch / fix

  • libio-socket-ssl-perl Debian 14, Debian 13, Debian 12 1.35-1

debian advisories DEBIAN-CVE-2010-4334

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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-2010-4334 updated cvss 4.0

perl-IO-Socket-SSL: ignores user request for peer verification

  • Red Hat Enterprise Linux 6 perl-IO-Socket-SSL
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 5 perl-IO-Socket-SSL
    not affected: vulnerable code not present

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

1.78% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.0 AV:N/AC:H/Au:N/C:P/I:P/A:N

Classification

Weakness

References

Sources

Fencer Intel 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.