Summary
USN-5638-1 fixed a vulnerability in Expat. This update provides
the corresponding updates for Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and
Ubuntu 22.04 LTS.
It was discovered that Expat incorrectly handled memory in out-of-memory
situations. An attacker could possibly use this issue to cause a crash,
resulting in a denial of service, or possibly execute arbitrary code.
This issue only affected Ubuntu 18.04 LTS. (CVE-2022-43680)
Original advisory details:
Rhodri James discovered that Expat incorrectly handled memory when
processing certain malformed XML files. An attacker could possibly
use this issue to cause a crash or execute arbitrary code.
Fixed packages 3
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 18.04 LTS 18.04:LTS | expat | 2.2.5-3ubuntu0.8 |
| Ubuntu · 20.04 LTS 20.04:LTS | expat | 2.2.9-1ubuntu0.5 |
| Ubuntu · 22.04 LTS 22.04:LTS | expat | 2.4.7-1ubuntu0.1 |
Vulnerabilities 2
-
High 8.1
libexpat before 2.4.9 has a use-after-free in the doContent function in xmlparse.c.
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High 7.5CVE-2022-43680 Public exploit
In libexpat through 2.4.9, there is a use-after free caused by overeager destruction of a shared DTD in XML_ExternalEnt…