perl-libwww-perl: no hostname check against SSL certificate name by default
Published May 13, 2011
4.3
MEDIUMCVSS 2.0
EPSS 4.25%
Description
The Net::HTTPS module in libwww-perl (LWP) before 6.00, as used in WWW::Mechanize, LWP::UserAgent, and other products, when running in environments that do not set the If-SSL-Cert-Subject header, does not enable full validation of SSL certificates by default, which allows remote attackers to spoof servers via man-in-the-middle (MITM) attacks involving hostnames that are not properly validated. NOTE: it could be argued that this is a design limitation of the Net::HTTPS API, and separate implementations should be independently assigned CVE identifiers for not working around this limitation. However, because this API was modified within LWP, a single CVE identifier has been assigned.
Affected products
No data.
- 0.01
- 0.02
- 0.03
- 0.04
- 5.00
- 5.01
- 5.02
- 5.03
- 5.04
- 5.05
- 5.06
- 5.07
- 5.08
- 5.09
- 5.10
- 5.11
- 5.12
- 5.13
- 5.14
- 5.15
- 5.16
- 5.17
- 5.18
- 5.18_03
- 5.18_04
- 5.18_05
- 5.19
- 5.20
- 5.21
- 5.22
- 5.30
- 5.31
- 5.32
- 5.33
- 5.34
- 5.35
- 5.36
- 5.41
- 5.42
- 5.43
- 5.44
- 5.45
- 5.46
- 5.47
- 5.48
- 5.49
- 5.50
- 5.51
- 5.52
- 5.53
- 5.53_90
- 5.53_91
- 5.53_92
- 5.53_93
- 5.53_94
- 5.53_95
- 5.53_96
- 5.53_97
- 5.60
- 5.61
- 5.62
- 5.63
- 5.64
- 5.65
- 5.66
- 5.67
- 5.68
- 5.69
- 5.70
- 5.71
- 5.72
- 5.73
- 5.74
- 5.75
- 5.76
- 5.77
- 5.78
- 5.79
- 5.800
- 5.801
- 5.802
- 5.803
- 5.804
- 5.805
- 5.806
- 5.807
- 5.808
- 5.810
- 5.811
- 5.812
- 5.813
- 5.814
- 5.815
- 5.816
- 5.817
- 5.818
- 5.819
- 5.820
- 5.821
- 5.822
- 5.823
- 5.824
- 5.825
- 5.826
- 5.827
- 5.828
- 5.829
- 5.830
- 5.831
- 5.832
- 5.833
- 5.834
- 5.836
- 5b5
- 5b6
- 5b7
- 5b8
- 5b9
- 5b10
- 5b11
- 5b12
- 5b13
- ≤ 5.837
- 5.40_01
No data.
Red Hat Enterprise Linux 4
perl-libwww-perl
Will not fix
Red Hat Enterprise Linux 5
perl-libwww-perl
Will not fix
Red Hat Enterprise Linux 6
perl-libwww-perl
Will not fix
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | perl-libwww-perl | Will not fix | n/a |
| Red Hat Enterprise Linux 5 | perl-libwww-perl | Will not fix | n/a |
| Red Hat Enterprise Linux 6 | perl-libwww-perl | Will not fix | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 4.25% (0.04246) | 90.73th | v5 (v2026.06.15) |
| Jun 15, 2026 | 4.25% (0.04246) | 89.72th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.15% (0.00148) | 32.71th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.20% (0.00201) | 58.93th | v3 (v2023.03.01) |
| Apr 25, 2024 | 0.19% (0.00195) | 56.53th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.16% (0.00164) | 51.74th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.20% (0.00201) | 56.15th | v3 (v2023.03.01) |
| Mar 6, 2023 | 1.14% (0.01136) | 59.45th | v2 (v2022.01.01) |
| Oct 18, 2022 | 1.14% (0.01136) | 58.28th | v2 (v2022.01.01) |
| Apr 1, 2022 | 1.14% (0.01136) | 56.27th | v2 (v2022.01.01) |
| Feb 4, 2022 | 1.14% (0.01136) | 34.23th | v2 (v2022.01.01) |
References (7)
- http://cpansearch.perl.org/src/GAAS/libwww-perl-6.02/Changes x_refsource_MISC
- http://vttynotes.blogspot.com/2010/12/man-in-middle-fun-with-perl-lwp.html x_refsource_MISC
- http://vttynotes.blogspot.com/2011/03/quick-note-on-lwp-and-perl-security-cve.html x_refsource_MISC
- https://access.redhat.com/security/cve/CVE-2011-0633 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=705044 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2011-0633
- https://www.cve.org/CVERecord?id=CVE-2011-0633
| Link | Providers | Tags |
|---|---|---|
| http://cpansearch.perl.org/src/GAAS/libwww-perl-6.02/Changes | x_refsource_MISC | |
| http://vttynotes.blogspot.com/2010/12/man-in-middle-fun-with-perl-lwp.html | x_refsource_MISC | |
| http://vttynotes.blogspot.com/2011/03/quick-note-on-lwp-and-perl-security-cve.html | x_refsource_MISC | |
| https://access.redhat.com/security/cve/CVE-2011-0633 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=705044 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2011-0633 | ||
| https://www.cve.org/CVERecord?id=CVE-2011-0633 |
Change history (0)
No recorded changes yet.