Don't be afraid of XXE vulnerabilities: understand the beast and how to detect them

Today XML External Entities XXE vulnerabilities are still ubiquitous, despite the fact that recommendations to protect against them have been an integral part of security standards for years. In this post, the first in a series of three blog posts, we will try to demystify XXE vulnerabilities and...

Expat nextScaffoldPart buffer overflow vulnerability

Expat is a fast streaming XML parser written in C. A buffer overflow vulnerability exists in versions of Expat prior to 2.4.3, which stems from a boundary error in xmlparse.c in nextScaffoldPart when processing untrusted input. A remote attacker could exploit this vulnerability to execute arbitra...

Expat build_model function buffer overflow vulnerability

Expat is a fast streaming XML parser written in C. A buffer overflow vulnerability exists in versions of Expat prior to 2.4.3, which stems from a boundary error in buildmodel in xmlparse.c when handling untrusted input. A remote attacker could exploit this vulnerability to execute arbitrary code ...

Expat defineAttribute function buffer overflow vulnerability

Expat is a fast streaming XML parser written in C. A buffer overflow vulnerability exists in versions of Expat prior to 2.4.3, which stems from a boundary error in defineAttribute in xmlparse.c when handling untrusted input. A remote attacker could exploit this vulnerability to execute arbitrary...

Expat addBinding function buffer overflow vulnerability

Expat is a fast streaming XML parser written in C. A buffer overflow vulnerability exists in versions of Expat prior to 2.4.3, which stems from a boundary error in the addBinding in xmlparse.c when handling untrusted input. A remote attacker could exploit this vulnerability to execute arbitrary...

Expat storeAtt function buffer overflow vulnerability

Expat is a fast streaming XML parser written in C. libexpat is a streaming XML parser written in C. A buffer overflow vulnerability exists in versions of Expat prior to 2.4.3, which stems from a boundary error in storeAtts in xmlparse.c when processing untrusted input. A remote attacker could...

Fix of 8 CVEs

CVE-2021-3517.patch: validate UTF8 in xmlEncodeEntities - CVE-2021-3518.patch: fix user-after-free with 'xmllint --xinclude --dropdtd' - CVE-2021-3537.patch: propagate error in xmlParseElementChildrenContentDeclPriv - CVE-2021-3541.patch: parser fix for the billion laughs attack -...

Integer overflow

storeAtts in xmlparse.c in Expat aka libexpat before 2.4.3 has an integer overflow...

CVE-2022-22823

buildmodel in xmlparse.c in Expat aka libexpat before 2.4.3 has an integer overflow...

Expat has an unspecified vulnerability

Expat is a fast streaming XML parser written in C. Expat is vulnerable in versions prior to 2.4.3. The vulnerability stems from mgroupSize in Expat's xmlparse.c that does not properly validate data boundaries when performing operations on memory, resulting in incorrect read and write operations...

Expat has an unspecified vulnerability

Expat is a fast streaming XML parser written in C. A security vulnerability exists in Expat, which stems from the fact that in Expat aka libexpat prior to 2.4.3, the storeAtts function in xmlparse.c shifted left by 29 or more bits may cause realloc misbehavior e.g., allocating too few bytes too...

CVE-2021-45960

In Expat aka libexpat before 2.4.3, a left shift by 29 or more places in the storeAtts function in xmlparse.c can lead to realloc misbehavior e.g., allocating too few bytes, or only freeing memory...

XML External Entity (XXE)

tinkerpop is vulnerable to XML external entity attacks. The gremlin-core package does not disable the XML input stream potentially allowing attackers to submit malicious XML to the XML parser and gain access to sensitive information...

Jenkins Report Info XML External Entity Processing Information Disclosure Vulnerability

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Jenkins Report Info. Authentication is required to exploit this vulnerability. The specific flaw exists within the PMD class. Due to the improper restriction of XML External Entity XXE...

Security Bulletin: Vulnerability in Xerces-C (CVE-2018-1311)

Summary Xerces-C is a validating XML parser written in a portable subset of C++. Xerces-C makes it easy to give your application the ability to read and write XML data. A shared library is provided for parsing, generating, manipulating, and validating XML documents. XML parser contains a...

Jenkins code issue vulnerability (CNVD-2021-93371)

Jenkins is a Jenkins open source application. An open source automation server Jenkins provides hundreds of plugins to support building, deploying, and automating any project.A code issue vulnerability exists in Jenkins Plugin, which stems from OWASP Dependency-Check version 5.1.1 and earlier not...

Jenkins code issue vulnerability (CNVD-2021-93372)

Jenkins is a Jenkins open source application. An open source automation server Jenkins provides hundreds of plugins to support building, deploying, and automating any project. a code issue vulnerability exists in Jenkins Plugin, which stems from the pom2config plugin version 1.2 and earlier not...

Jenkins code issue vulnerability (CNVD-2021-93373)

Jenkins is a Jenkins open source application. An open source automation server Jenkins provides hundreds of plugins to support building, deploying, and automating any project.A code issue vulnerability exists in Jenkins Plugin that stems from the Performance plugin version 3.20 and earlier not...

Jenkins pom2config XML External Entity Processing Information Disclosure Vulnerability

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Jenkins pom2config. Authentication is required to exploit this vulnerability. The specific flaw exists within the Pom2Config class. Due to the improper restriction of XML External Entity XXE...

Jenkins Performance XML External Entity Processing Information Disclosure Vulnerability

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Jenkins Performance. Authentication is required to exploit this vulnerability. The specific flaw exists within the TaurusParser class. Due to the improper restriction of XML External Entity X...