medium
4.3
CWE
20
Advisory Published
CVE Published
Updated

CVE-2011-0633: Input Validation

First published: Fri May 13 2011(Updated: )

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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
libwww-perl=5.40_01
libwww-perl<=5.837
libwww-perl=5.828
libwww-perl=5.827
libwww-perl=5.826
libwww-perl=5.825
libwww-perl=5.811
libwww-perl=5.810
libwww-perl=5.808
libwww-perl=5.807
libwww-perl=5.74
libwww-perl=5.73
libwww-perl=5.72
libwww-perl=5.71
libwww-perl=5.53_92
libwww-perl=5.53_91
libwww-perl=5.53_90
libwww-perl=5.53
libwww-perl=5.52
libwww-perl=5.36
libwww-perl=5.35
libwww-perl=5.34
libwww-perl=5.33
libwww-perl=5.15
libwww-perl=5.14
libwww-perl=5.13
libwww-perl=5.12
libwww-perl=5b12
libwww-perl=5b11
libwww-perl=5b10
libwww-perl=5b9
libwww-perl=5.836
libwww-perl=5.833
libwww-perl=5.820
libwww-perl=5.819
libwww-perl=5.818
libwww-perl=5.817
libwww-perl=5.802
libwww-perl=5.801
libwww-perl=5.800
libwww-perl=5.79
libwww-perl=5.65
libwww-perl=5.64
libwww-perl=5.63
libwww-perl=5.62
libwww-perl=5.53_97
libwww-perl=5.47
libwww-perl=5.46
libwww-perl=5.45
libwww-perl=5.44
libwww-perl=5.20
libwww-perl=5.19
libwww-perl=5.18_05
libwww-perl=5.18_04
libwww-perl=5.07
libwww-perl=5.06
libwww-perl=5.05
libwww-perl=5.04
libwww-perl=0.04
libwww-perl=0.03
libwww-perl=0.02
libwww-perl=0.01
libwww-perl=5.831
libwww-perl=5.829
libwww-perl=5.824
libwww-perl=5.822
libwww-perl=5.815
libwww-perl=5.813
libwww-perl=5.805
libwww-perl=5.803
libwww-perl=5.78
libwww-perl=5.76
libwww-perl=5.69
libwww-perl=5.67
libwww-perl=5.60
libwww-perl=5.53_96
libwww-perl=5.53_94
libwww-perl=5.51
libwww-perl=5.49
libwww-perl=5.42
libwww-perl=5.32
libwww-perl=5.30
libwww-perl=5.21
libwww-perl=5.18_03
libwww-perl=5.17
libwww-perl=5.10
libwww-perl=5.08
libwww-perl=5.03
libwww-perl=5.01
libwww-perl=5b13
libwww-perl=5b8
libwww-perl=5b6
libwww-perl=5.834
libwww-perl=5.832
libwww-perl=5.830
libwww-perl=5.823
libwww-perl=5.821
libwww-perl=5.816
libwww-perl=5.814
libwww-perl=5.812
libwww-perl=5.806
libwww-perl=5.804
libwww-perl=5.77
libwww-perl=5.75
libwww-perl=5.70
libwww-perl=5.68
libwww-perl=5.66
libwww-perl=5.61
libwww-perl=5.53_95
libwww-perl=5.53_93
libwww-perl=5.50
libwww-perl=5.48
libwww-perl=5.43
libwww-perl=5.41
libwww-perl=5.31
libwww-perl=5.22
libwww-perl=5.18
libwww-perl=5.16
libwww-perl=5.11
libwww-perl=5.09
libwww-perl=5.02
libwww-perl=5.00
libwww-perl=5b7
libwww-perl=5b5

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-0633?

    CVE-2011-0633 has a critical severity rating as it allows remote attackers to spoof SSL certificate verifications.

  • How do I fix CVE-2011-0633?

    To fix CVE-2011-0633, upgrade to libwww-perl version 6.00 or later to ensure full SSL certificate validation.

  • Who is affected by CVE-2011-0633?

    CVE-2011-0633 affects users of libwww-perl versions prior to 6.00 that do not set the If-SSL-Cert-Subject header.

  • What types of attacks can CVE-2011-0633 facilitate?

    CVE-2011-0633 can facilitate man-in-the-middle attacks, allowing attackers to intercept and alter communications.

  • Is there a known exploit for CVE-2011-0633?

    While no specific exploits for CVE-2011-0633 have been widely publicized, the vulnerability poses a significant risk to secure communications.

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