build_model in xmlparse.c in Expat (aka libexpat) before 2.4.3 has an integer overflow.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| https://github.com/libexpat/libexpat/pull/539 | third party advisory |
| http://www.openwall.com/lists/oss-security/2022/01/17/3 | third party advisory mailing list |
| https://www.tenable.com/security/tns-2022-05 | third party advisory |
| https://www.debian.org/security/2022/dsa-5073 | third party advisory vendor advisory |
| https://cert-portal.siemens.com/productcert/pdf/ssa-484086.pdf | third party advisory patch |
| https://security.gentoo.org/glsa/202209-24 | third party advisory vendor advisory |