Summary
It was discovered that the GNU C Library was not properly handling certain
memory operations. An attacker could possibly use this issue to cause a
denial of service (application crash). (CVE-2023-4806, CVE-2023-4813)
It was discovered that the GNU C library was not properly implementing a
fix for CVE-2023-4806 in certain cases, which could lead to a memory leak.
An attacker could possibly use this issue to cause a denial of service
(application crash). This issue only affected Ubuntu 22.04 LTS and Ubuntu
23.04. (CVE-2023-5156)
Fixed packages 4
| Release | Package | Fixed in |
|---|---|---|
| Ubuntu · 20.04 LTS 20.04:LTS | glibc | 2.31-0ubuntu9.14 |
| Ubuntu · 22.04 LTS 22.04:LTS | glibc | 2.35-0ubuntu3.5 |
| Ubuntu · Pro 16.04 LTS Pro:16.04:LTS | glibc | 2.23-0ubuntu11.3+esm5 |
| Ubuntu · Pro 18.04 LTS Pro:18.04:LTS | glibc | 2.27-3ubuntu1.6+esm1 |
Vulnerabilities 3
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High 7.5
Glibc: dos due to memory leak in getaddrinfo.c
A flaw was found in the GNU C Library. A recent fix for CVE-2023-4806 introduced the potential for a memory leak, which may result in an application crash.
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Medium 5.9
Glibc: potential use-after-free in getaddrinfo()
A flaw has been identified in glibc. In an extremely rare situation, the getaddrinfo function may access memory that has been freed, resulting in an application crash. This issue is only exploitable when a NSS module implements only the _nss_*_gethostbyname2_…
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Medium 5.9CVE-2023-4813 Public exploit
Glibc: potential use-after-free in gaih_inet()
A flaw has been identified in glibc. In an uncommon situation, the gaih_inet function may use memory that has been freed, resulting in an application crash. This issue is only exploitable when the getaddrinfo function is called and the hosts database in /etc/…