Botan up to 2.5.x TLS-CBC Ciphertext numeric error

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability was found in Botan up to 2.5.x. It has been classified as problematic. This issue affects some unknown processing of the component TLS-CBC Ciphertext Handler. The manipulation leads to numeric error. This vulnerability is traded as CVE-2018-9860. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Botan up to 2.5.x. This issue affects an unknown code block of the component TLS-CBC Ciphertext Handler. The manipulation with an unknown input leads to a numeric error vulnerability. Using CWE to declare the problem leads to CWE-189. Impacted is availability. The summary by CVE is:

An issue was discovered in Botan 1.11.32 through 2.x before 2.6.0. An off-by-one error when processing malformed TLS-CBC ciphertext could cause the receiving side to include in the HMAC computation exactly 64K bytes of data following the record buffer, aka an over-read. The MAC comparison will subsequently fail and the connection will be closed. This could be used for denial of service. No information leak occurs.

The bug was discovered 04/10/2018. The weakness was shared 04/12/2018 (Website). It is possible to read the advisory at botan.randombit.net. The identification of this vulnerability is CVE-2018-9860 since 04/09/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries VDB-93182, VDB-115529 and VDB-119574 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Numeric error
CWE: CWE-189
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/09/2018 🔍
04/10/2018 +1 days 🔍
04/12/2018 +1 days 🔍
04/12/2018 +0 days 🔍
04/16/2018 +4 days 🔍
01/25/2020 +649 days 🔍

Sourcesinfo

Advisory: botan.randombit.net
Status: Not defined

CVE: CVE-2018-9860 (🔍)
GCVE (CVE): GCVE-0-2018-9860
GCVE (VulDB): GCVE-100-116219
See also: 🔍

Entryinfo

Created: 04/16/2018 09:42
Updated: 01/25/2020 08:49
Changes: 04/16/2018 09:42 (56), 01/25/2020 08:49 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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