libsixel 1.8.4 PNG File encoder.c sixel_encoder_output_without_macro heap-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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3.5$0-$5k0.00

Summaryinfo

A vulnerability was found in libsixel 1.8.4. It has been classified as critical. The affected element is the function sixel_encoder_output_without_macro of the file encoder.c of the component PNG File Handler. Performing a manipulation results in heap-based overflow. This vulnerability is cataloged as CVE-2020-21677. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in libsixel 1.8.4. This affects the function sixel_encoder_output_without_macro of the file encoder.c of the component PNG File Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. CWE is classifying the issue as CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). This is going to have an impact on availability.

The weakness was shared 08/11/2021. The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2020-21677. Technical details are known, but no exploit is available.

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

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

Productinfo

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.5
VulDB Meta Temp Score: 3.5

VulDB Base Score: 3.5
VulDB Temp Score: 3.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

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

08/13/2020 🔍
08/11/2021 +363 days 🔍
08/11/2021 +0 days 🔍
08/15/2021 +4 days 🔍

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2020-21677 (🔍)
GCVE (CVE): GCVE-0-2020-21677
GCVE (VulDB): GCVE-100-180549

Entryinfo

Created: 08/11/2021 13:00
Updated: 08/15/2021 16:44
Changes: 08/11/2021 13:00 (37), 08/15/2021 16:44 (2)
Complete: 🔍
Cache ID: 216::103

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

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