CWE-134
AllowedUse of Externally-Controlled Format String
Abstraction: Base · Status: Draft
The product uses a function that accepts a format string as an argument, but the format string originates from an external source.
501 vulnerabilities reference this CWE, most recent first.
GHSA-F39P-M8R2-P6F6
Vulnerability from github – Published: 2022-05-17 02:14 – Updated: 2024-12-27 18:30The zmq3 input and output modules in rsyslog before 8.28.0 interpreted description fields as format strings, possibly allowing a format string attack with unspecified impact.
{
"affected": [],
"aliases": [
"CVE-2017-12588"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2017-08-06T14:29:00Z",
"severity": "CRITICAL"
},
"details": "The zmq3 input and output modules in rsyslog before 8.28.0 interpreted description fields as format strings, possibly allowing a format string attack with unspecified impact.",
"id": "GHSA-f39p-m8r2-p6f6",
"modified": "2024-12-27T18:30:25Z",
"published": "2022-05-17T02:14:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2017-12588"
},
{
"type": "WEB",
"url": "https://github.com/rsyslog/rsyslog/pull/1565"
},
{
"type": "WEB",
"url": "https://github.com/rsyslog/rsyslog/commit/062d0c671a29f7c6f7dff4a2f1f35df375bbb30b"
},
{
"type": "WEB",
"url": "https://github.com/rsyslog/rsyslog/blob/master/ChangeLog"
},
{
"type": "WEB",
"url": "https://security.netapp.com/advisory/ntap-20241227-0009"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F3JQ-F2PM-V9M4
Vulnerability from github – Published: 2024-11-22 21:32 – Updated: 2025-09-23 15:31A use of externally-controlled format string vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers who have gained administrator access to obtain secret data or modify memory.
We have already fixed the vulnerability in the following versions: QTS 5.2.1.2930 build 20241025 and later QuTS hero h5.2.1.2929 build 20241025 and later
{
"affected": [],
"aliases": [
"CVE-2024-50398"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-11-22T16:15:32Z",
"severity": "LOW"
},
"details": "A use of externally-controlled format string vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow remote attackers who have gained administrator access to obtain secret data or modify memory.\n\nWe have already fixed the vulnerability in the following versions:\nQTS 5.2.1.2930 build 20241025 and later\nQuTS hero h5.2.1.2929 build 20241025 and later",
"id": "GHSA-f3jq-f2pm-v9m4",
"modified": "2025-09-23T15:31:05Z",
"published": "2024-11-22T21:32:15Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-50398"
},
{
"type": "WEB",
"url": "https://www.qnap.com/en/security-advisory/qsa-24-43"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-F3R7-PGVQ-GJH2
Vulnerability from github – Published: 2025-08-20 18:30 – Updated: 2025-08-20 18:30Solar FTP Server fails to properly handle format strings passed to the USER command. When a specially crafted string containing format specifiers is sent, the server crashes due to a read access violation in the __output_1() function of sfsservice.exe. This results in a denial of service (DoS) condition.
{
"affected": [],
"aliases": [
"CVE-2011-10029"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-08-20T16:15:35Z",
"severity": "HIGH"
},
"details": "Solar FTP Server fails to properly handle format strings passed to the USER command. When a specially crafted string containing format specifiers is sent, the server crashes due to a read access violation in the __output_1() function of sfsservice.exe. This results in a denial of service (DoS) condition.",
"id": "GHSA-f3r7-pgvq-gjh2",
"modified": "2025-08-20T18:30:21Z",
"published": "2025-08-20T18:30:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2011-10029"
},
{
"type": "WEB",
"url": "https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/auxiliary/dos/windows/ftp/solarftp_user.rb"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20111009122553/http://solarftp.com/blog/news/solar-ftp-server-2-1-2.html"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20111102141514/https://solarftp.com"
},
{
"type": "WEB",
"url": "https://www.exploit-db.com/exploits/16204"
},
{
"type": "WEB",
"url": "https://www.vulncheck.com/advisories/solar-ftp-server-malformed-user-dos"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
GHSA-F4FV-MC3V-9J6C
Vulnerability from github – Published: 2026-05-07 09:31 – Updated: 2026-05-07 09:31A remote denial-of-service vulnerability exists in the ZTE Cloud PC client uSmartview, which may lead to memory corruption and remote denial of service.
{
"affected": [],
"aliases": [
"CVE-2026-44407"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-07T09:16:27Z",
"severity": "MODERATE"
},
"details": "A remote denial-of-service vulnerability exists in the ZTE Cloud PC client uSmartview, which may lead to memory corruption and remote denial of service.",
"id": "GHSA-f4fv-mc3v-9j6c",
"modified": "2026-05-07T09:31:27Z",
"published": "2026-05-07T09:31:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-44407"
},
{
"type": "WEB",
"url": "https://support.zte.com.cn/zte-iccp-isupport-webui/bulletin/detail/4783596796997009530"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F594-PVW5-8F79
Vulnerability from github – Published: 2022-12-22 00:30 – Updated: 2022-12-29 00:30A vulnerability, which was classified as critical, has been found in sslh. This issue affects the function hexdump of the file probe.c of the component Packet Dumping Handler. The manipulation of the argument msg_info leads to format string. The attack may be initiated remotely. The name of the patch is b19f8a6046b080e4c2e28354a58556bb26040c6f. It is recommended to apply a patch to fix this issue. The identifier VDB-216497 was assigned to this vulnerability.
{
"affected": [],
"aliases": [
"CVE-2022-4639"
],
"database_specific": {
"cwe_ids": [
"CWE-119",
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2022-12-21T22:15:00Z",
"severity": "CRITICAL"
},
"details": "A vulnerability, which was classified as critical, has been found in sslh. This issue affects the function hexdump of the file probe.c of the component Packet Dumping Handler. The manipulation of the argument msg_info leads to format string. The attack may be initiated remotely. The name of the patch is b19f8a6046b080e4c2e28354a58556bb26040c6f. It is recommended to apply a patch to fix this issue. The identifier VDB-216497 was assigned to this vulnerability.",
"id": "GHSA-f594-pvw5-8f79",
"modified": "2022-12-29T00:30:35Z",
"published": "2022-12-22T00:30:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-4639"
},
{
"type": "WEB",
"url": "https://github.com/yrutschle/sslh/pull/353"
},
{
"type": "WEB",
"url": "https://github.com/yrutschle/sslh/commit/b19f8a6046b080e4c2e28354a58556bb26040c6f"
},
{
"type": "WEB",
"url": "https://vuldb.com/?id.216497"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F6HC-7357-X73W
Vulnerability from github – Published: 2022-05-13 01:35 – Updated: 2025-10-22 00:31Format String vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code with elevated privileges on an affected device. Cisco Bug IDs: CSCvd73664.
{
"affected": [],
"aliases": [
"CVE-2018-0175"
],
"database_specific": {
"cwe_ids": [
"CWE-119",
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2018-03-28T22:29:00Z",
"severity": "HIGH"
},
"details": "Format String vulnerability in the Link Layer Discovery Protocol (LLDP) subsystem of Cisco IOS Software, Cisco IOS XE Software, and Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition or execute arbitrary code with elevated privileges on an affected device. Cisco Bug IDs: CSCvd73664.",
"id": "GHSA-f6hc-7357-x73w",
"modified": "2025-10-22T00:31:30Z",
"published": "2022-05-13T01:35:43Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2018-0175"
},
{
"type": "WEB",
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03"
},
{
"type": "WEB",
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04"
},
{
"type": "WEB",
"url": "https://ics-cert.us-cert.gov/advisories/ICSA-18-107-05"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-lldp"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-0175"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/103564"
},
{
"type": "WEB",
"url": "http://www.securitytracker.com/id/1040586"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.0/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F7VJ-6CQM-9XGC
Vulnerability from github – Published: 2022-05-24 17:08 – Updated: 2025-10-22 00:31A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability is due to improper validation of string input from certain fields in Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges on an affected device. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
{
"affected": [],
"aliases": [
"CVE-2020-3118"
],
"database_specific": {
"cwe_ids": [
"CWE-134",
"CWE-787"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-02-05T18:15:00Z",
"severity": "HIGH"
},
"details": "A vulnerability in the Cisco Discovery Protocol implementation for Cisco IOS XR Software could allow an unauthenticated, adjacent attacker to execute arbitrary code or cause a reload on an affected device. The vulnerability is due to improper validation of string input from certain fields in Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to cause a stack overflow, which could allow the attacker to execute arbitrary code with administrative privileges on an affected device. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).",
"id": "GHSA-f7vj-6cqm-9xgc",
"modified": "2025-10-22T00:31:50Z",
"published": "2022-05-24T17:08:03Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-3118"
},
{
"type": "WEB",
"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200205-iosxr-cdp-rce"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-3118"
},
{
"type": "WEB",
"url": "http://packetstormsecurity.com/files/156203/Cisco-Discovery-Protocol-CDP-Remote-Device-Takeover.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F879-GMXV-6JV3
Vulnerability from github – Published: 2022-04-29 03:01 – Updated: 2022-04-29 03:01Unspecified vulnerability in Window Maker 0.80.2 and earlier allows attackers to perform unknown actions via format string specifiers in a font specification in WMGLOBAL, probably a format string vulnerability.
{
"affected": [],
"aliases": [
"CVE-2004-2714"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2004-12-31T05:00:00Z",
"severity": "MODERATE"
},
"details": "Unspecified vulnerability in Window Maker 0.80.2 and earlier allows attackers to perform unknown actions via format string specifiers in a font specification in WMGLOBAL, probably a format string vulnerability.",
"id": "GHSA-f879-gmxv-6jv3",
"modified": "2022-04-29T03:01:58Z",
"published": "2022-04-29T03:01:58Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2004-2714"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/17845"
},
{
"type": "WEB",
"url": "http://secunia.com/advisories/12961"
},
{
"type": "WEB",
"url": "http://securitytracker.com/id?1011918"
},
{
"type": "WEB",
"url": "http://www.osvdb.org/11108"
},
{
"type": "WEB",
"url": "http://www.securityfocus.com/bid/11512"
},
{
"type": "WEB",
"url": "http://www.windowmaker.org/src/ChangeLog"
}
],
"schema_version": "1.4.0",
"severity": []
}
GHSA-F8VH-3M24-38R6
Vulnerability from github – Published: 2022-05-17 19:57 – Updated: 2024-04-04 00:01Multiple format string vulnerabilities in the python module in RRDtool, as used in Zenoss Core before 4.2.5 and other products, allow remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted third argument to the rrdtool.graph function, aka ZEN-15415, a related issue to CVE-2013-2131.
{
"affected": [],
"aliases": [
"CVE-2014-6262"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2020-02-12T02:15:00Z",
"severity": "HIGH"
},
"details": "Multiple format string vulnerabilities in the python module in RRDtool, as used in Zenoss Core before 4.2.5 and other products, allow remote attackers to execute arbitrary code or cause a denial of service (application crash) via a crafted third argument to the rrdtool.graph function, aka ZEN-15415, a related issue to CVE-2013-2131.",
"id": "GHSA-f8vh-3m24-38r6",
"modified": "2024-04-04T00:01:19Z",
"published": "2022-05-17T19:57:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2014-6262"
},
{
"type": "WEB",
"url": "https://github.com/oetiker/rrdtool-1.x/pull/532"
},
{
"type": "WEB",
"url": "https://github.com/oetiker/rrdtool-1.x/commit/64ed5314af1255ab6dded45f70b39cdeab5ae2ec"
},
{
"type": "WEB",
"url": "https://github.com/oetiker/rrdtool-1.x/commit/85261a013112e278c90224033f5b0592ee387786"
},
{
"type": "WEB",
"url": "https://docs.google.com/spreadsheets/d/1dHAc4PxUbs-4Dxzm1wSCE0sMz5UCMY6SW3PlMHSyuuQ/edit?usp=sharing"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2020/03/msg00000.html"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2020/03/msg00003.html"
},
{
"type": "WEB",
"url": "https://www.securityfocus.com/bid/71540"
},
{
"type": "WEB",
"url": "http://www.kb.cert.org/vuls/id/449452"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-F9FR-W54Q-772H
Vulnerability from github – Published: 2022-05-01 06:42 – Updated: 2024-02-09 22:01Format string vulnerability in LocalSyslogAppender in Apache log4net 1.2.9 might allow remote attackers to cause a denial of service (memory corruption and termination) via unknown vectors.
{
"affected": [
{
"database_specific": {
"last_known_affected_version_range": "\u003c= 1.2.9"
},
"package": {
"ecosystem": "NuGet",
"name": "log4net"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.2.10"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2006-0743"
],
"database_specific": {
"cwe_ids": [
"CWE-134"
],
"github_reviewed": true,
"github_reviewed_at": "2024-02-09T22:01:06Z",
"nvd_published_at": "2006-03-09T20:02:00Z",
"severity": "MODERATE"
},
"details": "Format string vulnerability in LocalSyslogAppender in Apache log4net 1.2.9 might allow remote attackers to cause a denial of service (memory corruption and termination) via unknown vectors.",
"id": "GHSA-f9fr-w54q-772h",
"modified": "2024-02-09T22:01:06Z",
"published": "2022-05-01T06:42:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2006-0743"
},
{
"type": "WEB",
"url": "https://github.com/apache/logging-log4net/commit/ea3faab25fe5f1d4dbda9f5da8dcfa6fc3d9e1b8"
},
{
"type": "WEB",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/25196"
},
{
"type": "PACKAGE",
"url": "https://github.com/apache/logging-log4net"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20070114054835/http://www.novell.com/linux/security/advisories/2006_26_sr.html"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20140304060609/https://issues.apache.org/jira/browse/LOG4NET-67"
},
{
"type": "WEB",
"url": "https://web.archive.org/web/20200229022118/http://www.securityfocus.com/bid/17095"
}
],
"schema_version": "1.4.0",
"severity": [],
"summary": "Apache log4net format string vulnerability causes DoS"
}
Mitigation
Choose a language that is not subject to this flaw.
Mitigation
Ensure that all format string functions are passed a static string which cannot be controlled by the user, and that the proper number of arguments are always sent to that function as well. If at all possible, use functions that do not support the %n operator in format strings. [REF-116] [REF-117]
Mitigation
Run compilers and linkers with high warning levels, since they may detect incorrect usage.
CAPEC-135: Format String Injection
An adversary includes formatting characters in a string input field on the target application. Most applications assume that users will provide static text and may respond unpredictably to the presence of formatting character. For example, in certain functions of the C programming languages such as printf, the formatting character %s will print the contents of a memory location expecting this location to identify a string and the formatting character %n prints the number of DWORD written in the memory. An adversary can use this to read or write to memory locations or files, or simply to manipulate the value of the resulting text in unexpected ways. Reading or writing memory may result in program crashes and writing memory could result in the execution of arbitrary code if the adversary can write to the program stack.
CAPEC-67: String Format Overflow in syslog()
This attack targets applications and software that uses the syslog() function insecurely. If an application does not explicitely use a format string parameter in a call to syslog(), user input can be placed in the format string parameter leading to a format string injection attack. Adversaries can then inject malicious format string commands into the function call leading to a buffer overflow. There are many reported software vulnerabilities with the root cause being a misuse of the syslog() function.