GNU binutils 2.31.1 libbfd elflink.c File Descriptor null pointer dereference
CVSS Meta Temp Score | Current Exploit Price (≈) | CTI Interest Score |
---|---|---|
5.4 | $0-$5k | 0.00 |
A vulnerability classified as problematic has been found in GNU binutils 2.31.1 (Programming Tool Software). Affected is some unknown processing of the file elflink.c of the component libbfd. The manipulation as part of a File Descriptor leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability. CVE summarizes:
A NULL pointer dereference was discovered in elf_link_add_object_symbols in elflink.c in the Binary File Descriptor (BFD) library (aka libbfd), as distributed in GNU Binutils 2.31.1. This occurs for a crafted ET_DYN with no program headers. A specially crafted ELF file allows remote attackers to cause a denial of service, as demonstrated by ld.
The bug was discovered 12/31/2018. The weakness was published 01/01/2019 (Website). The advisory is available at sourceware.org. This vulnerability is traded as CVE-2018-20651 since 01/01/2019. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are known, but there is no available exploit.
The vulnerability was handled as a non-public zero-day exploit for at least 1 days. During that time the estimated underground price was around $0-$5k.
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
Product
Type
Vendor
Name
Version
License
CPE 2.3
CPE 2.2
CVSSv4
VulDB CVSS-B Score: 🔍VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 5.4VulDB 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: 🔍
CVSSv2
AV | AC | Au | C | I | A |
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💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
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Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
Exploiting
Class: Null pointer dereferenceCWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍
Local: No
Remote: Yes
Availability: 🔍
Status: Not defined
EPSS Score: 🔍
EPSS Percentile: 🔍
Price Prediction: 🔍
Current Price Estimation: 🔍
0-Day | unlock | unlock | unlock | unlock |
---|---|---|---|---|
Today | unlock | unlock | unlock | unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔍
Patch: 54025d5812ff100f5f0654eb7e1ffd50f2e37f5f
Timeline
12/31/2018 🔍01/01/2019 🔍
01/01/2019 🔍
01/01/2019 🔍
01/01/2019 🔍
01/02/2019 🔍
06/22/2023 🔍
Sources
Vendor: gnu.orgAdvisory: K38336243
Status: Not defined
Confirmation: 🔍
CVE: CVE-2018-20651 (🔍)
SecurityFocus: 106440 - GNU Binutils CVE-2018-20651 Denial of Service Vulnerability
Entry
Created: 01/02/2019 10:53Updated: 06/22/2023 16:28
Changes: 01/02/2019 10:53 (62), 04/25/2020 16:54 (4), 06/22/2023 16:21 (4), 06/22/2023 16:28 (1)
Complete: 🔍
Cache ID: 3:7F1:103
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