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AUSCERT External Security Bulletin Redistribution
ESB-2021.2414
USN-5009-1: libslirp vulnerabilities
16 July 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: libslirp
Publisher: Ubuntu
Operating System: Ubuntu
Impact/Access: Access Confidential Data -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-3595 CVE-2021-3594 CVE-2021-3593
CVE-2021-3592 CVE-2020-29130 CVE-2020-29129
Reference: ESB-2021.2091
ESB-2021.1306
Original Bulletin:
https://ubuntu.com/security/notices/USN-5009-1
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USN-5009-1: libslirp vulnerabilities
15 July 2021
Several security issues were fixed in libslirp.
Releases
o Ubuntu 21.04
o Ubuntu 20.10
o Ubuntu 20.04 LTS
Packages
o libslirp - General purpose TCP-IP emulator library
Details
Qiuhao Li discovered that libslirp incorrectly handled certain header data
lengths. An attacker inside a guest could possibly use this issue to leak
sensitive information from the host. This issue only affected Ubuntu 20.04
LTS and Ubuntu 20.10. ( CVE-2020-29129 , CVE-2020-29130 )
It was discovered that libslirp incorrectly handled certain udp packets. An
attacker inside a guest could possibly use this issue to leak sensitive
information from the host. ( CVE-2021-3592 , CVE-2021-3593 , CVE-2021-3594 ,
CVE-2021-3595 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 21.04
o libslirp0 - 4.4.0-1ubuntu0.1
Ubuntu 20.10
o libslirp0 - 4.3.1-1ubuntu0.1
Ubuntu 20.04
o libslirp0 - 4.1.0-2ubuntu2.2
After a standard system update you need to reboot your computer to make
all the necessary changes.
References
o CVE-2021-3594
o CVE-2021-3593
o CVE-2020-29130
o CVE-2021-3595
o CVE-2020-29129
o CVE-2021-3592
Related notices
o USN-5010-1 : qemu-system-common, qemu-system-x86, qemu, qemu-kvm,
qemu-system-x86-xen, qemu-system-gui, qemu-system-s390x, qemu-guest-agent,
qemu-utils, qemu-block-extra, qemu-system-x86-microvm, qemu-system-ppc,
qemu-system-data, qemu-system-mips, qemu-user-static, qemu-system,
qemu-system-arm, qemu-user, qemu-system-misc, qemu-user-binfmt,
qemu-system-sparc
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