rdesktop up to 1.8.3 rdpsnddbg_process integer underflow

CVSS Meta Temp Score
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in rdesktop up to 1.8.3. The affected element is the function rdpsnddbg_process. The manipulation leads to integer underflow. This vulnerability is traded as CVE-2018-20180. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in rdesktop up to 1.8.3 and classified as critical. This issue affects the function rdpsnddbg_process. The manipulation with an unknown input leads to a integer underflow vulnerability. Using CWE to declare the problem leads to CWE-191. The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

rdesktop versions up to and including v1.8.3 contain an Integer Underflow that leads to a Heap-Based Buffer Overflow in the function rdpsnddbg_process() and results in memory corruption and probably even a remote code execution.

The bug was discovered 02/05/2019. The weakness was shared 03/15/2019 (Website). It is possible to read the advisory at research.checkpoint.com. The identification of this vulnerability is CVE-2018-20180 since 12/17/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 38 days. During that time the estimated underground price was around $0-$5k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277595 (Fedora Security Update for rdesktop (FEDORA-2019-5146cd34e2)).

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

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 106938†). The entries VDB-127328, VDB-127329, VDB-127330 and VDB-127331 are related to this item. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

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Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Integer underflow
CWE: CWE-191 / 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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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Patch: github.com

Timelineinfo

12/17/2018 🔍
02/05/2019 +50 days 🔍
02/05/2019 +0 days 🔍
03/15/2019 +38 days 🔍
03/16/2019 +1 days 🔍
08/01/2023 +1599 days 🔍

Sourcesinfo

Product: github.com

Advisory: DLA 1683-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-20180 (🔍)
GCVE (CVE): GCVE-0-2018-20180
GCVE (VulDB): GCVE-100-131819
SecurityFocus: 106938 - RDP Client 'FreeRDP' And 'rdesktop' Multiple Security Vulnerabilities

See also: 🔍

Entryinfo

Created: 03/16/2019 07:49
Updated: 08/01/2023 19:05
Changes: 03/16/2019 07:49 (59), 05/17/2020 09:28 (4), 08/01/2023 19:05 (4)
Complete: 🔍
Cache ID: 216::103

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

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