medium
4.3
CWE
189 476
Advisory Published
Updated

CVE-2013-4122: Null Pointer Dereference

First published: Sun Oct 27 2013(Updated: )

Cyrus SASL 2.1.23, 2.1.26, and earlier does not properly handle when a NULL value is returned upon an error by the crypt function as implemented in glibc 2.17 and later, which allows remote attackers to cause a denial of service (thread crash and consumption) via (1) an invalid salt or, when FIPS-140 is enabled, a (2) DES or (3) MD5 encrypted password, which triggers a NULL pointer dereference.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
Cyrus SASL<=2.1.26
Cyrus SASL=1.5.28
Cyrus SASL=2.1.19
Cyrus SASL=2.1.20
Cyrus SASL=2.1.21
Cyrus SASL=2.1.22
Cyrus SASL=2.1.23
Cyrus SASL=2.1.24
Cyrus SASL=2.1.25
GNU C Library=2.2
GNU C Library=2.2.1
GNU C Library=2.2.2
GNU C Library=2.2.3
GNU C Library=2.2.4
GNU C Library=2.2.5
GNU C Library=2.3
GNU C Library=2.3.1
GNU C Library=2.3.2
GNU C Library=2.3.3
GNU C Library=2.3.4
GNU C Library=2.3.5
GNU C Library=2.3.6
GNU C Library=2.3.10
GNU C Library=2.4
GNU C Library=2.5
GNU C Library=2.5.1
GNU C Library=2.6
GNU C Library=2.6.1
GNU C Library=2.7
GNU C Library=2.8
GNU C Library=2.9
GNU C Library=2.17
GNU C Library=2.18

Remedy

http://git.cyrusimap.org/cyrus-sasl/commit/?id=dedad73e5e7a75d01a5f3d5a6702ab8ccd2ff40d

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2013-4122?

    CVE-2013-4122 has been classified as a High severity vulnerability due to its potential to cause denial of service.

  • How do I fix CVE-2013-4122?

    To fix CVE-2013-4122, update Cyrus SASL to version 2.1.27 or later, where the vulnerability has been addressed.

  • Which versions of Cyrus SASL are affected by CVE-2013-4122?

    CVE-2013-4122 affects Cyrus SASL versions 2.1.23 through 2.1.26 and also version 1.5.28.

  • What kind of attack does CVE-2013-4122 enable?

    CVE-2013-4122 enables remote attackers to potentially cause a denial of service which results in thread crashes.

  • Is this vulnerability related to glibc implementations?

    Yes, CVE-2013-4122 is related to the way glibc 2.17 and later handle NULL returns from the crypt function.

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