Ubuntu.comUB:CVE-2023-4527CVE-2023-4527
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:H/Au:N/C:P/I:N/A:P
0.001 Low
EPSS
Percentile
38.2%
A flaw was found in glibc. When the getaddrinfo function is called with the
AF_UNSPEC address family and the system is configured with no-aaaa mode via
/etc/resolv.conf, a DNS response via TCP larger than 2048 bytes can
potentially disclose stack contents through the function returned address
data, and may cause a crash.
Bugs
- <https://sourceware.org/bugzilla/show_bug.cgi?id=30842>
- <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1051958>
Notes
| Author | Note |
|---|---|
| mdeslaur | no-aaaa was introduced in 2.36 by: https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=f282cdbe7f436c75864e5640a409a10485e9abb2 system needs to be configured in no-aaaa mode in resolv.conf |
Related
6.5 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:H
4 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
HIGH
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:H/Au:N/C:P/I:N/A:P
0.001 Low
EPSS
Percentile
38.2%