Category Archives: Advisories

USN-5366-2: FriBidi vulnerabilities

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USN-5366-1 fixed several vulnerabilities in FriBidi. This update provides the
corresponding updates for Ubuntu 22.04 LTS.

Original advisory details:

It was discovered that FriBidi incorrectly handled processing of input strings
resulting in memory corruption. An attacker could use this issue to cause
FriBidi to crash, resulting in a denial of service, or potentially execute
arbitrary code. (CVE-2022-25308)

It was discovered that FriBidi incorrectly validated input data to its CapRTL
unicode encoder, resulting in memory corruption. An attacker could use this
issue to cause FriBidi to crash, resulting in a denial of service, or
potentially execute arbitrary code. (CVE-2022-25309)

It was discovered that FriBidi incorrectly handled empty input when removing
marks from unicode strings, resulting in a crash. An attacker could use this
to cause FriBidi to crash, resulting in a denial of service, or potentially
execute arbitrary code. (CVE-2022-25310)

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CVE-2021-26629

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A path traversal vulnerability in XPLATFORM’s runtime archive function could lead to arbitrary file creation. When the .xzip archive file is decompressed, an arbitrary file can be d in the parent path by using the path traversal pattern ‘..’.

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CVE-2021-26628

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Insufficient script validation of the admin page enables XSS, which causes unauthorized users to steal admin privileges. When uploading file in a specific menu, the verification of the files is insufficient. It allows remote attackers to upload arbitrary files disguising them as image files.

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USN-5389-1: Libcroco vulnerabilities

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It was discovered that Libcroco was incorrectly accessing data structures when
reading bytes from memory, which could cause a heap buffer overflow. An attacker
could possibly use this issue to cause a denial of service. (CVE-2017-7960)

It was discovered that Libcroco was incorrectly handling invalid UTF-8 values
when processing CSS files. An attacker could possibly use this issue to cause
a denial of service. (CVE-2017-8834, CVE-2017-8871)

It was discovered that Libcroco was incorrectly implementing recursion in one
of its parsing functions, which could cause an infinite recursion loop and a
stack overflow due to stack consumption. An attacker could possibly use this
issue to cause a denial of service. (CVE-2020-12825)

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