CVE-2013-6422: Input Validation
First published: Mon Dec 23 2013(Updated: )
The GnuTLS backend in libcurl 7.21.4 through 7.33.0, when disabling digital signature verification (CURLOPT_SSL_VERIFYPEER), also disables the CURLOPT_SSL_VERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle (MITM) attacks.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Debian Linux | =7.0 | |
| Ubuntu | =12.04 | |
| Ubuntu | =12.10 | |
| Ubuntu | =13.04 | |
| Ubuntu | =13.10 | |
| libcurl | =7.21.4 | |
| libcurl | =7.21.5 | |
| libcurl | =7.21.6 | |
| libcurl | =7.21.7 | |
| libcurl | =7.22.0 | |
| libcurl | =7.23.0 | |
| libcurl | =7.23.1 | |
| libcurl | =7.24.0 | |
| libcurl | =7.25.0 | |
| libcurl | =7.26.0 | |
| libcurl | =7.27.0 | |
| libcurl | =7.28.0 | |
| libcurl | =7.28.1 | |
| libcurl | =7.29.0 | |
| libcurl | =7.30.0 | |
| libcurl | =7.31.0 | |
| libcurl | =7.32.0 | |
| libcurl | =7.33.0 |
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2013-6422?
CVE-2013-6422 is considered a high severity vulnerability due to the potential for man-in-the-middle attacks.
How do I fix CVE-2013-6422?
To fix CVE-2013-6422, it is recommended to upgrade to a version of libcurl later than 7.33.0.
Which versions of libcurl are affected by CVE-2013-6422?
CVE-2013-6422 affects libcurl versions from 7.21.4 to 7.33.0.
What impact does CVE-2013-6422 have on security?
CVE-2013-6422 allows remote attackers to spoof server identities, potentially leading to unauthorized access to sensitive information.
Is it safe to disable CURLOPT_SSL_VERIFYPEER due to CVE-2013-6422?
Disabling CURLOPT_SSL_VERIFYPEER is not safe with CVE-2013-6422 as it also disables critical hostname verification checks.
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/author
- agent/weakness
- agent/severity
- agent/last-modified-date
- agent/references
- agent/description
- agent/first-publish-date
- agent/event
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/debian
- canonical/debian linux
- version/debian linux/7.0
- vendor/canonical
- canonical/ubuntu
- version/ubuntu/12.04
- version/ubuntu/12.10
- version/ubuntu/13.04
- version/ubuntu/13.10
- vendor/haxx
- canonical/libcurl
- version/libcurl/7.21.4
- version/libcurl/7.21.5
- version/libcurl/7.21.6
- version/libcurl/7.21.7
- version/libcurl/7.22.0
- version/libcurl/7.23.0
- version/libcurl/7.23.1
- version/libcurl/7.24.0
- version/libcurl/7.25.0
- version/libcurl/7.26.0
- version/libcurl/7.27.0
- version/libcurl/7.28.0
- version/libcurl/7.28.1
- version/libcurl/7.29.0
- version/libcurl/7.30.0
- version/libcurl/7.31.0
- version/libcurl/7.32.0
- version/libcurl/7.33.0