CWE-476
NULL Pointer Dereference
The product dereferences a pointer that it expects to be valid but is NULL.
CVE-2019-14874 (GCVE-0-2019-14874)
Vulnerability from cvelistv5 – Published: 2020-03-19 15:07 – Updated: 2024-08-05 00:26
VLAI
Summary
In the __i2b function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocate a big integer, however no check is performed to verify if the allocation succeeded or not. The access of _ x[0] will trigger a null pointer dereference bug in case of a memory allocation failure.
Severity
6.5 (Medium)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://census-labs.com/news/2020/01/31/multiple-… | x_refsource_CONFIRM |
Impacted products
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CVE-2019-14875 (GCVE-0-2019-14875)
Vulnerability from cvelistv5 – Published: 2020-03-19 15:08 – Updated: 2024-08-05 00:26
VLAI
Summary
In the __multiply function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocate a big integer, however no check is performed to verify if the allocation succeeded or not. The access of _x[0] will trigger a null pointer dereference bug in case of a memory allocation failure.
Severity
6.5 (Medium)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://census-labs.com/news/2020/01/31/multiple-… | x_refsource_CONFIRM |
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CVE-2019-14876 (GCVE-0-2019-14876)
Vulnerability from cvelistv5 – Published: 2020-03-19 15:08 – Updated: 2024-08-05 00:26
VLAI
Summary
In the __lshift function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocate a big integer, however no check is performed to verify if the allocation succeeded or not. The access to b1 will trigger a null pointer dereference bug in case of a memory allocation failure.
Severity
6.5 (Medium)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://census-labs.com/news/2020/01/31/multiple-… | x_refsource_CONFIRM |
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CVE-2019-14877 (GCVE-0-2019-14877)
Vulnerability from cvelistv5 – Published: 2020-03-19 15:04 – Updated: 2024-08-05 00:26
VLAI
Summary
In the __mdiff function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocate big integers, however no check is performed to verify if the allocation succeeded or not. The access to _wds and _sign will trigger a null pointer dereference bug in case of a memory allocation failure.
Severity
6.5 (Medium)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://census-labs.com/news/2020/01/31/multiple-… | x_refsource_CONFIRM |
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CVE-2019-14878 (GCVE-0-2019-14878)
Vulnerability from cvelistv5 – Published: 2020-03-19 15:04 – Updated: 2024-08-05 00:26
VLAI
Summary
In the __d2b function of the newlib libc library, all versions prior to 3.3.0 (see newlib/libc/stdlib/mprec.c), Balloc is used to allocate a big integer, however no check is performed to verify if the allocation succeeded or not. Accessing _x will trigger a null pointer dereference bug in case of a memory allocation failure.
Severity
6.5 (Medium)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://census-labs.com/news/2020/01/31/multiple-… | x_refsource_CONFIRM |
Impacted products
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CVE-2019-15680 (GCVE-0-2019-15680)
Vulnerability from cvelistv5 – Published: 2019-10-29 16:45 – Updated: 2024-08-05 00:56
VLAI
Summary
TightVNC code version 1.3.10 contains null pointer dereference in HandleZlibBPP function, which results Denial of System (DoS). This attack appear to be exploitable via network connectivity.
Severity
No CVSS data available.
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://www.openwall.com/lists/oss-security/2018/… | mailing-listx_refsource_MLIST |
| https://lists.debian.org/debian-lts-announce/2019… | mailing-listx_refsource_MLIST |
| https://usn.ubuntu.com/4407-1/ | vendor-advisoryx_refsource_UBUNTU |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
| https://us-cert.cisa.gov/ics/advisories/icsa-20-343-08 | x_refsource_MISC |
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CVE-2019-1900 (GCVE-0-2019-1900)
Vulnerability from cvelistv5 – Published: 2019-08-21 18:20 – Updated: 2024-11-19 19:00
VLAI
Title
Cisco Integrated Management Controller Unauthenticated Denial of Service Vulnerability
Summary
A vulnerability in the web server of Cisco Integrated Management Controller (IMC) could allow an unauthenticated, remote attacker to cause the web server process to crash, causing a denial of service (DoS) condition on an affected system. The vulnerability is due to insufficient validation of user-supplied input on the web interface. An attacker could exploit this vulnerability by submitting a crafted HTTP request to certain endpoints of the affected software. A successful exploit could allow an attacker to cause the web server to crash. Physical access to the device may be required for a restart.
Severity
7.5 (High)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://tools.cisco.com/security/center/content/C… | vendor-advisoryx_refsource_CISCO |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco Unified Computing System (Management Software) |
Affected:
unspecified , < 4.0(2f)
(custom)
|
Date Public
2019-08-21 00:00
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CVE-2019-1922 (GCVE-0-2019-1922)
Vulnerability from cvelistv5 – Published: 2019-07-06 01:25 – Updated: 2024-11-21 19:19
VLAI
Title
Cisco IP Phone 7800 and 8800 Series Session Initiation Protocol Denial of Service Vulnerability
Summary
A vulnerability in Cisco SIP IP Phone Software for Cisco IP Phone 7800 Series and 8800 Series could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected phone. The vulnerability is due to insufficient validation of input Session Initiation Protocol (SIP) packets. An attacker could exploit this vulnerability by altering the SIP replies that are sent to the affected phone during the registration process. A successful exploit could allow the attacker to cause the phone to reboot and not complete the registration process.
Severity
5.3 (Medium)
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://tools.cisco.com/security/center/content/C… | vendor-advisoryx_refsource_CISCO |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Cisco | Cisco IP Phone 8800 Series Software |
Affected:
unspecified , < 12.0(1)MN130
(custom)
|
Date Public
2019-07-03 00:00
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CVE-2019-3840 (GCVE-0-2019-3840)
Vulnerability from cvelistv5 – Published: 2019-03-27 12:24 – Updated: 2024-08-04 19:19
VLAI
Summary
A NULL pointer dereference flaw was discovered in libvirt before version 5.0.0 in the way it gets interface information through the QEMU agent. An attacker in a guest VM can use this flaw to crash libvirtd and cause a denial of service.
Severity
5.8 (Medium)
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… | x_refsource_CONFIRM |
| https://bugzilla.redhat.com/show_bug.cgi?id=1663051 | x_refsource_CONFIRM |
| https://www.redhat.com/archives/libvir-list/2019-… | x_refsource_CONFIRM |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://access.redhat.com/errata/RHSA-2019:2294 | vendor-advisoryx_refsource_REDHAT |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| The libvirt Project | libvirt |
Affected:
5.0.0
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CVE-2019-3995 (GCVE-0-2019-3995)
Vulnerability from cvelistv5 – Published: 2019-12-17 21:59 – Updated: 2024-08-04 19:26
VLAI
Summary
ELOG 3.1.4-57bea22 and below is affected by a denial of service vulnerability due to a NULL pointer dereference. A remote unauthenticated attacker can crash the ELOG server by sending a crafted HTTP GET request.
Severity
No CVSS data available.
CWE
- CWE-476 - NULL Pointer Dereference
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://www.tenable.com/security/research/tra-2019-53 | x_refsource_MISC |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
| https://lists.fedoraproject.org/archives/list/pac… | vendor-advisoryx_refsource_FEDORA |
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Mitigation ID: MIT-56
Phase: Implementation
Description:
- For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished [REF-1484].
Mitigation
Phase: Requirements
Description:
- Select a programming language that is not susceptible to these issues.
Mitigation
Phase: Implementation
Description:
- Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
Mitigation
Phase: Architecture and Design
Description:
- Identify all variables and data stores that receive information from external sources, and apply input validation to make sure that they are only initialized to expected values.
Mitigation
Phase: Implementation
Description:
- Explicitly initialize all variables and other data stores, either during declaration or just before the first usage.
No CAPEC attack patterns related to this CWE.