SUSE update for xen
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2021-20257 |
| CWE-ID | CWE-835 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
SUSE Linux Enterprise Server Operating systems & Components / Operating system SUSE Linux Enterprise Debuginfo Operating systems & Components / Operating system xen-debugsource Operating systems & Components / Operating system package or component xen-debuginfo Operating systems & Components / Operating system package or component xen-kmp-pae Operating systems & Components / Operating system package or component xen-tools Operating systems & Components / Operating system package or component xen-libs-32bit Operating systems & Components / Operating system package or component xen-doc-html Operating systems & Components / Operating system package or component xen Operating systems & Components / Operating system package or component xen-tools-domU Operating systems & Components / Operating system package or component xen-libs Operating systems & Components / Operating system package or component xen-kmp-default Operating systems & Components / Operating system package or component |
| Vendor | SUSE |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Infinite loop
EUVDB-ID: #VU59085
Risk: Medium
CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2021-20257
CWE-ID:
CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')
Exploit availability: No
DescriptionThe vulnerability allows a remote user to perform a denial of service (DoS) attack.
The vulnerability exists due to infinite loop in the e1000 NIC emulator when processing transmits (tx) descriptors in process_tx_desc of QEMU. A remote user can consume all available CPU resources and cause denial of service conditions.
MitigationUpdate the affected package xen to the latest version.
Vulnerable software versionsSUSE Linux Enterprise Server: 11-SP4-LTSS-EXTREME-CORE
SUSE Linux Enterprise Debuginfo: 11-SP4
xen-debugsource: before 4.4.4_48-61.64.1
xen-debuginfo: before 4.4.4_48-61.64.1
xen-kmp-pae: before 4.4.4_48_3.0.101_108.123-61.64.1
xen-tools: before 4.4.4_48-61.64.1
xen-libs-32bit: before 4.4.4_48-61.64.1
xen-doc-html: before 4.4.4_48-61.64.1
xen: before 4.4.4_48-61.64.1
xen-tools-domU: before 4.4.4_48-61.64.1
xen-libs: before 4.4.4_48-61.64.1
xen-kmp-default: before 4.4.4_48_3.0.101_108.123-61.64.1
CPE2.3- cpe:2.3:o:suse:suse_linux_enterprise_server:11-SP4-LTSS-EXTREME-CORE:*:*:*:*:*:*:*
- cpe:2.3:o:suse:suse_linux_enterprise_debuginfo:11-SP4:*:*:*:*:*:*:*
- cpe:2.3:a:suse:xen-debugsource:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:xen-debuginfo:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:xen-kmp-pae:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:xen-tools:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:xen-libs-32bit:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:xen-doc-html:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:xen:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:xen-tools-domu:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:xen-libs:*:*:*:*:*:suse_linux:*:*
- cpe:2.3:a:suse:xen-kmp-default:*:*:*:*:*:suse_linux:*:*
https://www.suse.com/support/update/announcement/2021/suse-su-202114702-1/
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
