VDB-102688 · CVE-2017-9763 · BID 99141

GNU GRUB fs/ext2.c grub_ext2_read_block Binary File memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.00

Summaryinfo

A vulnerability described as problematic has been identified in GNU GRUB. This vulnerability affects the function grub_ext2_read_block of the file fs/ext2.c. Executing a manipulation as part of Binary File can lead to memory corruption. This vulnerability appears as CVE-2017-9763. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in GNU GRUB (unknown version). It has been declared as problematic. This vulnerability affects the function grub_ext2_read_block of the file fs/ext2.c. The manipulation as part of a Binary File leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect availability. CVE summarizes:

The grub_ext2_read_block function in fs/ext2.c in GNU GRUB before 2013-11-12, as used in shlr/grub/fs/ext2.c in radare2 1.5.0, allows remote attackers to cause a denial of service (excessive stack use and application crash) via a crafted binary file, related to use of a variable-size stack array.

The bug was discovered 06/12/2017. The weakness was presented 06/19/2017 (Website). The advisory is shared for download at git.savannah.gnu.org. This vulnerability was named CVE-2017-9763 since 06/19/2017. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 172172 (SUSE Enterprise Linux Security Update for grub2 (SUSE-SU-2019:13989-1)).

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 vulnerability database at SecurityFocus (BID 99141†). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • radare2 1.5.0

Productinfo

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
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: Upgrade
Status: 🔍

0-Day Time: 🔍

Patch: git.savannah.gnu.org

Timelineinfo

11/12/2013 🔍
06/12/2017 +1308 days 🔍
06/19/2017 +7 days 🔍
06/19/2017 +0 days 🔍
06/19/2017 +0 days 🔍
06/19/2017 +0 days 🔍
06/20/2017 +1 days 🔍
12/08/2022 +1997 days 🔍

Sourcesinfo

Vendor: gnu.org

Advisory: 65000a7fd9eea62359e6d6714f17b94a99a82edd
Researcher: Kamil Frankowicz
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-9763 (🔍)
GCVE (CVE): GCVE-0-2017-9763
GCVE (VulDB): GCVE-100-102688
SecurityFocus: 99141 - GNU GRUB CVE-2017-9763 Remote Denial Of Service Vulnerability

Entryinfo

Created: 06/20/2017 08:11
Updated: 12/08/2022 16:22
Changes: 06/20/2017 08:11 (63), 10/19/2019 09:39 (4), 12/29/2020 10:16 (3), 12/08/2022 16:22 (4)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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