Common Weakness Enumeration
CWE-193
AllowedOff-by-one Error
Abstraction: Base · Status: Draft
A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.
313 vulnerabilities reference this CWE, most recent first.
CVE-2021-3999 (GCVE-0-2021-3999)
Vulnerability from cvelistv5 – Published: 2022-08-24 00:00 – Updated: 2026-10-14 09:59
VLAI
EPSS
VEX
Summary
A flaw was found in glibc. An off-by-one buffer overflow and underflow in getcwd() may lead to memory corruption when the size of the buffer is exactly 1. A local attacker who can control the input buffer and size passed to getcwd() in a setuid program could use this flaw to potentially execute arbitrary code and escalate their privileges on the system.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-12-02 20:54 UTC
CWE
- CWE-193 - - Off-by-one Error
Assigner
References
10 references
Impacted products
4 products
| Vendor | Product | Version | |
|---|---|---|---|
| n/a | glibc |
Affected:
Fixed in glibc v2.31 and above.
|
|
| Siemens | SIMATIC S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.0 , < V3.1.5
(custom)
|
|
| Siemens | SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP |
Affected:
V3.1.0 , < V3.1.5
(custom)
|
|
| Siemens | SIPLUS S7-1500 CPU 1518-4 PN/DP MFP |
Affected:
V3.1.0 , < V3.1.5
(custom)
|
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CVE-2021-3930 (GCVE-0-2021-3930)
Vulnerability from cvelistv5 – Published: 2022-02-18 17:50 – Updated: 2024-08-03 17:09
VLAI
EPSS
VEX
Summary
An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.
Severity
No CVSS data available.
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=2020588 | x_refsource_MISC |
| https://security.netapp.com/advisory/ntap-2022022… | x_refsource_CONFIRM |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
| https://security.gentoo.org/glsa/202208-27 | vendor-advisoryx_refsource_GENTOO |
| https://lists.debian.org/debian-lts-announce/2022… | mailing-listx_refsource_MLIST |
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CVE-2020-27793 (GCVE-0-2020-27793)
Vulnerability from cvelistv5 – Published: 2022-08-19 22:43 – Updated: 2024-08-04 16:25
VLAI
EPSS
VEX
Summary
An off-by-one overflow flaw was found in radare2 due to mismatched array length in core_java.c. This could allow an attacker to cause a crash, and perform a denail of service attack.
Severity
No CVSS data available.
CWE
- CWE-193 - - Off-by-one Error
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/radareorg/radare2/issues/16304 | x_refsource_MISC |
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CVE-2020-14510 (GCVE-0-2020-14510)
Vulnerability from cvelistv5 – Published: 2020-08-25 13:19 – Updated: 2024-09-16 19:25
VLAI
EPSS
VEX
Title
OFF-BY-ONE ERROR CWE-193
Summary
GateManager versions prior to 9.2c, The affected product contains a hard-coded credential for telnet, allowing an unprivileged attacker to execute commands as root.
Severity
9.8 (Critical)
CWE
- CWE-193 - OFF-BY-ONE ERROR CWE-193
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://us-cert.cisa.gov/ics/advisories/icsa-20-210-01 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Secomea | GateManager |
Affected:
All versions prior to 9.2c , < 9.2c
(custom)
|
Date Public
2020-07-28 00:00
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CVE-2020-14508 (GCVE-0-2020-14508)
Vulnerability from cvelistv5 – Published: 2020-08-25 13:15 – Updated: 2024-09-16 16:33
VLAI
EPSS
VEX
Title
OFF-BY-ONE ERROR CWE-193
Summary
GateManager versions prior to 9.2c, The affected product is vulnerable to an off-by-one error, which may allow an attacker to remotely execute arbitrary code or cause a denial-of-service condition.
Severity
8.1 (High)
CWE
- CWE-193 - OFF-BY-ONE ERROR CWE-193
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://us-cert.cisa.gov/ics/advisories/icsa-20-210-01 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Secomea | GateManager |
Affected:
All versions prior to 9.2c , < 9.2c
(custom)
|
Date Public
2020-07-28 00:00
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CVE-2020-10062 (GCVE-0-2020-10062)
Vulnerability from cvelistv5 – Published: 2020-06-05 17:37 – Updated: 2024-09-17 00:51
VLAI
EPSS
VEX
Title
Packet length decoding error in MQTT
Summary
An off-by-one error in the Zephyr project MQTT packet length decoder can result in memory corruption and possible remote code execution. NCC-ZEP-031 This issue affects: zephyrproject-rtos zephyr version 2.2.0 and later versions.
Severity
9 (Critical)
CWE
- CWE-193 - Off-by-one Error
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://zephyrprojectsec.atlassian.net/browse/ZEPSEC-84 | x_refsource_MISC |
| https://docs.zephyrproject.org/latest/security/vu… | x_refsource_MISC |
| https://github.com/zephyrproject-rtos/zephyr/pull… | x_refsource_MISC |
| https://research.nccgroup.com/2020/05/26/research… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| zephyrproject-rtos | zephyr |
Affected:
2.2.0 , < unspecified
(custom)
|
Date Public
2020-05-25 00:00
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CVE-2019-10131 (GCVE-0-2019-10131)
Vulnerability from cvelistv5 – Published: 2019-04-30 18:01 – Updated: 2024-08-04 22:10
VLAI
EPSS
VEX
Summary
An off-by-one read vulnerability was discovered in ImageMagick before version 7.0.7-28 in the formatIPTCfromBuffer function in coders/meta.c. A local attacker may use this flaw to read beyond the end of the buffer or to crash the program.
Severity
6.5 (Medium)
CWE
Assigner
References
7 references
| URL | Tags |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… | x_refsource_CONFIRM |
| https://github.com/ImageMagick/ImageMagick/commit… | x_refsource_CONFIRM |
| http://www.securityfocus.com/bid/108117 | vdb-entryx_refsource_BID |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://usn.ubuntu.com/4034-1/ | vendor-advisoryx_refsource_UBUNTU |
| http://lists.opensuse.org/opensuse-security-annou… | vendor-advisoryx_refsource_SUSE |
| https://lists.debian.org/debian-lts-announce/2020… | mailing-listx_refsource_MLIST |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ImageMagick | ImageMagick |
Affected:
fixed in 7.0.7-28
|
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CVE-2019-8272 (GCVE-0-2019-8272)
Vulnerability from cvelistv5 – Published: 2019-03-09 00:00 – Updated: 2024-09-16 16:43
VLAI
EPSS
VEX
Summary
UltraVNC revision 1211 has multiple off-by-one vulnerabilities in VNC server code, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1212.
Severity
No CVSS data available.
CWE
- CWE-193 - Off-by-one Error
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://ics-cert.kaspersky.com/advisories/klcert-… | x_refsource_MISC |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
| https://www.us-cert.gov/ics/advisories/icsa-20-161-06 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Kaspersky Lab | UltraVNC |
Affected:
1.2.2.3
|
Date Public
2019-03-01 00:00
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CVE-2019-8268 (GCVE-0-2019-8268)
Vulnerability from cvelistv5 – Published: 2019-03-09 00:00 – Updated: 2024-09-17 01:16
VLAI
EPSS
VEX
Summary
UltraVNC revision 1206 has multiple off-by-one vulnerabilities in VNC client code connected with improper usage of ClientConnection::ReadString function, which can potentially result code execution. This attack appears to be exploitable via network connectivity. These vulnerabilities have been fixed in revision 1207.
Severity
No CVSS data available.
CWE
- CWE-193 - Off-by-one Error
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://ics-cert.kaspersky.com/advisories/klcert-… | x_refsource_MISC |
| https://cert-portal.siemens.com/productcert/pdf/s… | x_refsource_CONFIRM |
| https://www.us-cert.gov/ics/advisories/icsa-20-161-06 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Kaspersky Lab | UltraVNC |
Affected:
1.2.2.3
|
Date Public
2019-03-01 00:00
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CVE-2017-2618 (GCVE-0-2017-2618)
Vulnerability from cvelistv5 – Published: 2018-07-27 19:00 – Updated: 2024-08-05 14:02
VLAI
EPSS
VEX
Summary
A flaw was found in the Linux kernel's handling of clearing SELinux attributes on /proc/pid/attr files before 4.9.10. An empty (null) write to this file can crash the system by causing the system to attempt to access unmapped kernel memory.
Severity
5.5 (Medium)
CWE
Assigner
References
8 references
| URL | Tags |
|---|---|
| https://marc.info/?l=selinux&m=148588165923772&w=2 | mailing-listx_refsource_MLIST |
| https://www.debian.org/security/2017/dsa-3791 | vendor-advisoryx_refsource_DEBIAN |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… | x_refsource_CONFIRM |
| https://access.redhat.com/errata/RHSA-2017:0932 | vendor-advisoryx_refsource_REDHAT |
| https://git.kernel.org/pub/scm/linux/kernel/git/s… | x_refsource_CONFIRM |
| https://access.redhat.com/errata/RHSA-2017:0933 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2017:0931 | vendor-advisoryx_refsource_REDHAT |
| http://www.securityfocus.com/bid/96272 | vdb-entryx_refsource_BID |
Date Public
2017-01-31 00:00
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"cweId": "CWE-193",
"description": "CWE-193",
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],
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"url": "https://marc.info/?l=selinux\u0026m=148588165923772\u0026w=2"
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{
"name": "DSA-3791",
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{
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"url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2618"
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{
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"url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=0c461cb727d146c9ef2d3e86214f498b78b7d125"
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"name": "RHSA-2017:0933",
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"url": "https://access.redhat.com/errata/RHSA-2017:0933"
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{
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{
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"url": "http://www.securityfocus.com/bid/96272"
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"cveId": "CVE-2017-2618",
"datePublished": "2018-07-27T19:00:00.000Z",
"dateReserved": "2016-12-01T00:00:00.000Z",
"dateUpdated": "2024-08-05T14:02:07.208Z",
"state": "PUBLISHED"
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Mitigation
Implementation
When copying character arrays or using character manipulation methods, the correct size parameter must be used to account for the null terminator that needs to be added at the end of the array. Some examples of functions susceptible to this weakness in C include strcpy(), strncpy(), strcat(), strncat(), printf(), sprintf(), scanf() and sscanf().
No CAPEC attack patterns related to this CWE.