VDB-135747 · CVE-2019-12495 · BID 108541

Tiny C Compiler 0.9.27 Compiling x86_64-gen.c gsym_addr out-of-bounds write

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Tiny C Compiler 0.9.27 and classified as critical. The impacted element is the function gsym_addr of the file x86_64-gen.c of the component Compiling. Performing a manipulation results in out-of-bounds write. This vulnerability is reported as CVE-2019-12495. The attack requires a local approach. No exploit exists. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Detailsinfo

A vulnerability classified as critical has been found in Tiny C Compiler 0.9.27. This affects the function gsym_addr of the file x86_64-gen.c of the component Compiling. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. CWE is classifying the issue as CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An issue was discovered in Tiny C Compiler (aka TinyCC or TCC) 0.9.27. Compiling a crafted source file leads to a one-byte out-of-bounds write in the gsym_addr function in x86_64-gen.c. This occurs because tccasm.c mishandles section switches.

The weakness was disclosed 05/31/2019 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is uniquely identified as CVE-2019-12495 since 05/31/2019. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit.

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

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

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.4

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

NVD Base Score: 5.5
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: Out-of-bounds write
CWE: CWE-787 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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: 🔍

Patch: repo.or.cz

Timelineinfo

05/31/2019 🔍
05/31/2019 +0 days 🔍
05/31/2019 +0 days 🔍
09/25/2023 +1578 days 🔍

Sourcesinfo

Advisory: d04ce7772c2bc2781ab2502e0b1f1964488814b5⛔
Status: Not defined

CVE: CVE-2019-12495 (🔍)
GCVE (CVE): GCVE-0-2019-12495
GCVE (VulDB): GCVE-100-135747
SecurityFocus: 108541

Entryinfo

Created: 05/31/2019 07:01 PM
Updated: 09/25/2023 12:34 PM
Changes: 05/31/2019 07:01 PM (54), 06/17/2020 12:40 PM (1), 09/25/2023 12:34 PM (5)
Complete: 🔍
Cache ID: 244:53A:40

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