PT-2022-1384 · Libexpat+12 · Libexpat+12
Hartwork
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Published
2022-10-24
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Updated
2026-04-01
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CVE-2022-43680
CVSS v2.0
7.8
High
| Vector | AV:N/AC:L/Au:N/C:N/I:N/A:C |
Name of the Vulnerable Software and Affected Versions
libexpat versions 2.4.9 and earlier
Description
The issue is related to a use-after-free vulnerability in the
XML ExternalEntityParserCreate function of the libexpat XML parsing library. This vulnerability can be exploited by a remote attacker to cause a denial of service. The vulnerability occurs due to the overeager destruction of a shared DTD in out-of-memory situations. It may also lead to remote code execution with no additional execution privileges needed, and user interaction is not required for exploitation.Recommendations
For libexpat versions 2.4.9 and earlier, update to a version later than 2.4.9 to resolve the issue.
As a temporary workaround, consider disabling the
XML ExternalEntityParserCreate function until a patch is available.
Restrict access to the vulnerable library to minimize the risk of exploitation.Exploit
Fix
DoS
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Almalinux
Astra Linux
Centos
Debian
Ibm Aix
Linuxmint
Red Hat
Red Os
Rocky Linux
Suse
Ubuntu
Libexpat