GnuTLS 12.04 CBC Mode information exposure

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability marked as critical has been reported in GnuTLS 12.04. This vulnerability affects unknown code of the component CBC Mode Handler. The manipulation leads to information exposure. This vulnerability is uniquely identified as CVE-2015-8313. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in GnuTLS 12.04 (Network Encryption Software). This issue affects an unknown code of the component CBC Mode Handler. The manipulation with an unknown input leads to a information exposure vulnerability. Using CWE to declare the problem leads to CWE-203. The product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor, which exposes security-relevant information about the state of the product, such as whether a particular operation was successful or not. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

GnuTLS incorrectly validates the first byte of padding in CBC modes

The bug was discovered 12/01/2015. The weakness was disclosed 12/20/2019. The identification of this vulnerability is CVE-2015-8313 since 11/21/2015. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The vulnerability was handled as a non-public zero-day exploit for at least 41 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 87887 (SUSE SLED11 / SLES11 Security Update : gnutls (SUSE-SU-2016:0077-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 168376 (SUSE Enterprise Linux Security update for gnutls (SUSE-SU-2016:0077-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (87887) and SecurityFocus (BID 78327†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.6
VulDB Meta Temp Score: 6.5

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.9
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: Information exposure
CWE: CWE-203 / CWE-200 / CWE-284
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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Nessus ID: 87887
Nessus Name: SUSE SLED11 / SLES11 Security Update : gnutls (SUSE-SU-2016:0077-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703408
OpenVAS Name: Debian Security Advisory DSA 3408-1 (gnutls26 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

11/21/2015 🔍
11/30/2015 +9 days 🔍
12/01/2015 +1 days 🔍
01/11/2016 +41 days 🔍
01/13/2016 +2 days 🔍
12/20/2019 +1437 days 🔍
12/21/2019 +1 days 🔍
11/11/2024 +1787 days 🔍

Sourcesinfo

Advisory: debian.org
Status: Confirmed

CVE: CVE-2015-8313 (🔍)
GCVE (CVE): GCVE-0-2015-8313
GCVE (VulDB): GCVE-100-147557

OVAL: 🔍

SecurityFocus: 78327 - GnuTLS Padding Oracle Information Disclosure Vulnerability

Entryinfo

Created: 12/21/2019 08:43
Updated: 11/11/2024 11:24
Changes: 12/21/2019 08:43 (40), 12/21/2019 08:48 (33), 03/16/2024 09:03 (4), 11/11/2024 11:24 (19)
Complete: 🔍
Cache ID: 216:26B:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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