Unchecked Return Value in xen (Alpine package)
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2020-11742 |
| CWE-ID | CWE-252 |
| Exploitation vector | Local network |
| Public exploit | N/A |
| Vulnerable software Subscribe |
xen (Alpine package) Operating systems & Components / Operating system package or component |
| Vendor | Alpine Linux Development Team |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) Unchecked Return Value
EUVDB-ID: #VU31971
Risk: Medium
CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID: CVE-2020-11742
CWE-ID:
CWE-252 - Unchecked Return Value
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to introduction of unexpected behavior in the fix for CVE-2017-1213 that caused bad continuation handling in GNTTABOP_copy. A remote user can crash the hypervisor.
Install update from vendor's website.
Vulnerable software versionsxen (Alpine package): 4.1.3-r0 - 4.10.4-r2
External linkshttp://git.alpinelinux.org/aports/commit/?id=3992359a2b257143f6d354a15e0d3b338c5d8e45
http://git.alpinelinux.org/aports/commit/?id=b180bcb262c13cfed0346d5b2ed0e85aa113e302
http://git.alpinelinux.org/aports/commit/?id=5c40dfc3f9763d20de339d8f1b694b48631d253b
http://git.alpinelinux.org/aports/commit/?id=7c4c7fb75cb36f33395f8a86ae820e4fb9f8d59e
http://git.alpinelinux.org/aports/commit/?id=95332e4ed106c72d58a0a5490d0f608e3d76b83e
http://git.alpinelinux.org/aports/commit/?id=fa008233b860d6652d640df8ed23f5bdd8e42b9b
http://git.alpinelinux.org/aports/commit/?id=05b5ec57508952a3bf13538e1f72d2a5e9357796
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
