Botan up to 1.11.21 X.509 Certificate certificate validation

Summaryinfo

A vulnerability labeled as critical has been found in Botan up to 1.11.21. This affects an unknown function of the component X.509 Certificate. Such manipulation leads to certificate validation. This vulnerability is documented as CVE-2015-7826. The attack can be executed remotely. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Botan up to 1.11.21 and classified as very critical. Affected by this issue is an unknown part of the component X.509 Certificate. The manipulation with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The product does not validate, or incorrectly validates, a certificate. Impacted is confidentiality, integrity, and availability. CVE summarizes:

botan 1.11.x before 1.11.22 improperly handles wildcard matching against hostnames, which might allow remote attackers to have unspecified impact via a valid X.509 certificate, as demonstrated by accepting *.example.com as a match for bar.foo.example.com.

The bug was discovered 04/29/2016. The weakness was released 04/10/2017 (Website). The advisory is shared for download at botan.randombit.net. This vulnerability is handled as CVE-2015-7826 since 10/14/2015. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 08/28/2020). The MITRE ATT&CK project declares the attack technique as T1587.003.

The vulnerability was handled as a non-public zero-day exploit for at least 346 days. During that time the estimated underground price was around $0-$5k.

Upgrading to version 1.11.22 eliminates this vulnerability.

Entries connected to this vulnerability are available at VDB-99534 and VDB-99535. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Name

• Botan

Version

• 1.11.0
• 1.11.1
• 1.11.2
• 1.11.3
• 1.11.4
• 1.11.5
• 1.11.6
• 1.11.7
• 1.11.8
• 1.11.9
• 1.11.10
• 1.11.11
• 1.11.12
• 1.11.13
• 1.11.14
• 1.11.15
• 1.11.16
• 1.11.17
• 1.11.18
• 1.11.19
• 1.11.20
• 1.11.21

License

• open-source

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CPE 2.2info

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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