medium
5.1
CWE
189 119
Advisory Published
CVE Published
Updated

CVE-2011-2939: Buffer Overflow

First published: Wed Aug 17 2011(Updated: )

Off-by-one error in the decode_xs function in Unicode/Unicode.xs in the Encode module before 2.44, as used in Perl before 5.15.6, might allow context-dependent attackers to cause a denial of service (memory corruption) via a crafted Unicode string, which triggers a heap-based buffer overflow.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Encode<=2.43
Encode=0.93
Encode=0.94
Encode=0.95
Encode=0.96
Encode=0.97
Encode=0.98
Encode=0.99
Encode=1.00
Encode=1.01
Encode=1.10
Encode=1.11
Encode=1.20
Encode=1.21
Encode=1.25
Encode=1.26
Encode=1.28
Encode=1.30
Encode=1.31
Encode=1.32
Encode=1.33
Encode=1.34
Encode=1.40
Encode=1.41
Encode=1.42
Encode=1.50
Encode=1.51
Encode=1.52
Encode=1.53
Encode=1.54
Encode=1.55
Encode=1.56
Encode=1.57
Encode=1.58
Encode=1.59
Encode=1.60
Encode=1.61
Encode=1.62
Encode=1.63
Encode=1.64
Encode=1.65
Encode=1.66
Encode=1.67
Encode=1.68
Encode=1.69
Encode=1.70
Encode=1.71
Encode=1.72
Encode=1.73
Encode=1.74
Encode=1.75
Encode=1.76
Encode=1.77
Encode=1.78
Encode=1.79
Encode=1.80
Encode=1.81
Encode=1.82
Encode=1.83
Encode=1.84
Encode=1.85
Encode=1.86
Encode=1.87
Encode=1.88
Encode=1.89
Encode=1.90
Encode=1.91
Encode=1.92
Encode=1.93
Encode=1.94
Encode=1.95
Encode=1.96
Encode=1.97
Encode=1.98
Encode=1.99
Encode=2.0
Encode=2.01
Encode=2.02
Encode=2.03
Encode=2.04
Encode=2.05
Encode=2.06
Encode=2.07
Encode=2.08
Encode=2.09
Encode=2.10
Encode=2.11
Encode=2.12
Encode=2.13
Encode=2.14
Encode=2.15
Encode=2.16
Encode=2.17
Encode=2.18
Encode=2.19
Encode=2.20
Encode=2.21
Encode=2.22
Encode=2.23
Encode=2.24
Encode=2.25
Encode=2.26
Encode=2.27
Encode=2.28
Encode=2.29
Encode=2.30
Encode=2.31
Encode=2.32
Encode=2.33
Encode=2.34
Encode=2.35
Encode=2.36
Encode=2.37
Encode=2.38
Encode=2.39
Encode=2.40
Encode=2.41
Encode=2.42
Perl 5.30.0<=5.14.2
Perl 5.30.0=5.8.1
Perl 5.30.0=5.8.2
Perl 5.30.0=5.8.3
Perl 5.30.0=5.8.4
Perl 5.30.0=5.8.5
Perl 5.30.0=5.8.6
Perl 5.30.0=5.8.7
Perl 5.30.0=5.8.8
Perl 5.30.0=5.8.9
Perl 5.30.0=5.8.10
Perl 5.30.0=5.9.2
Perl 5.30.0=5.10
Perl 5.30.0=5.10.0
Perl 5.30.0=5.10.0-rc1
Perl 5.30.0=5.10.0-rc2
Perl 5.30.0=5.10.1
Perl 5.30.0=5.10.1-rc1
Perl 5.30.0=5.10.1-rc2
Perl 5.30.0=5.11.0
Perl 5.30.0=5.11.1
Perl 5.30.0=5.11.2
Perl 5.30.0=5.11.3
Perl 5.30.0=5.11.4
Perl 5.30.0=5.11.5
Perl 5.30.0=5.12.0
Perl 5.30.0=5.12.0-rc0
Perl 5.30.0=5.12.0-rc1
Perl 5.30.0=5.12.0-rc2
Perl 5.30.0=5.12.0-rc3
Perl 5.30.0=5.12.0-rc4
Perl 5.30.0=5.12.0-rc5
Perl 5.30.0=5.12.1
Perl 5.30.0=5.12.1-rc1
Perl 5.30.0=5.12.1-rc2
Perl 5.30.0=5.12.2
Perl 5.30.0=5.12.2-rc1
Perl 5.30.0=5.12.3
Perl 5.30.0=5.12.3-rc1
Perl 5.30.0=5.12.3-rc2
Perl 5.30.0=5.12.3-rc3
Perl 5.30.0=5.13.0
Perl 5.30.0=5.13.1
Perl 5.30.0=5.13.2
Perl 5.30.0=5.13.3
Perl 5.30.0=5.13.4
Perl 5.30.0=5.13.5
Perl 5.30.0=5.13.6
Perl 5.30.0=5.13.7
Perl 5.30.0=5.13.8
Perl 5.30.0=5.13.9
Perl 5.30.0=5.13.10
Perl 5.30.0=5.13.11
Perl 5.30.0=5.14.0
Perl 5.30.0=5.14.0-rc1
Perl 5.30.0=5.14.0-rc2
Perl 5.30.0=5.14.0-rc3
Perl 5.30.0=5.14.1

Remedy

http://perl5.git.perl.org/perl.git/commitdiff/e46d973584785af1f445c4dedbee4243419cb860#patch5

Remedy

http://www.openwall.com/lists/oss-security/2011/08/19/17

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=731246

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-2939?

    CVE-2011-2939 is considered a moderate severity vulnerability due to its potential to cause a denial of service via a memory corruption issue.

  • How do I fix CVE-2011-2939?

    To fix CVE-2011-2939, you should upgrade the Encode module to version 2.44 or later.

  • Which versions are affected by CVE-2011-2939?

    CVE-2011-2939 affects the Encode module versions prior to 2.44 and Perl versions prior to 5.15.6.

  • What type of vulnerability is CVE-2011-2939?

    CVE-2011-2939 is categorized as a heap-based buffer overflow caused by an off-by-one error.

  • Can CVE-2011-2939 be exploited remotely?

    Yes, CVE-2011-2939 can potentially be exploited by context-dependent attackers through specially crafted Unicode strings.

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