CVE-2019-19581
published 2019-12-11CVE-2019-19581: An issue was discovered in Xen through 4.12.x allowing 32-bit Arm guest OS users to cause a denial of service (out-of-bounds access) because certain bit…
PriorityP423medium6.5CVSS 3.1
AVLACLPRLUINSCCNINAH
EPSS
0.37%
30.0th percentile
An issue was discovered in Xen through 4.12.x allowing 32-bit Arm guest OS users to cause a denial of service (out-of-bounds access) because certain bit iteration is mishandled. In a number of places bitmaps are being used by the hypervisor to track certain state. Iteration over all bits involves functions which may misbehave in certain corner cases: On 32-bit Arm accesses to bitmaps with bit a count which is a multiple of 32, an out of bounds access may occur. A malicious guest may cause a hypervisor crash or hang, resulting in a Denial of Service (DoS). All versions of Xen are vulnerable. 32-bit Arm systems are vulnerable. 64-bit Arm systems are not vulnerable.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | xen | < xen 4.11.3+24-g14b62ab3e5-1 (bookworm) | xen 4.11.3+24-g14b62ab3e5-1 (bookworm) |
| fedoraproject | fedora | — | — |
| xen | xen | >= 0 < 4.11.3+24-g14b62ab3e5-1 | 4.11.3+24-g14b62ab3e5-1 |
| xen | xen | >= 0 < 4.11.3+24-g14b62ab3e5-1 | 4.11.3+24-g14b62ab3e5-1 |
| xen | xen | >= 0 < 4.11.3+24-g14b62ab3e5-1 | 4.11.3+24-g14b62ab3e5-1 |
| xen | xen | >= 0 < 4.11.3+24-g14b62ab3e5-1 | 4.11.3+24-g14b62ab3e5-1 |
| xen | xen | 4.8.0 – 4.12.1 | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
nvdv2.02.1LOWAV:L/AC:L/Au:N/C:N/I:N/A:P
osv6.5MEDIUM
vendor_debian6.5MEDIUM
vendor_redhat6.5MEDIUM
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
GHSA
GHSA-h398-v6mj-crpf: An issue was discovered in Xen through 4
ghsa_unreviewed·2022-05-24
CVE-2019-19581 [LOW] GHSA-h398-v6mj-crpf: An issue was discovered in Xen through 4
An issue was discovered in Xen through 4.12.x allowing 32-bit Arm guest OS users to cause a denial of service (out-of-bounds access) because certain bit iteration is mishandled. In a number of places bitmaps are being used by the hypervisor to track certain state. Iteration over all bits involves functions which may misbehave in certain corner cases: On 32-bit Arm accesses to bitmaps with bit a count which is a multiple of 32, an out of bounds access may occur. A malicious guest may cause a hypervisor crash or hang, resulting in a Denial of Service (DoS). All versions of Xen are vulnerable. 32-bit Arm systems are vulnerable. 64-bit Arm systems are not vulnerable.
OSV
CVE-2019-19581: An issue was discovered in Xen through 4
osv·2019-12-11·CVSS 6.5
CVE-2019-19581 [MEDIUM] CVE-2019-19581: An issue was discovered in Xen through 4
An issue was discovered in Xen through 4.12.x allowing 32-bit Arm guest OS users to cause a denial of service (out-of-bounds access) because certain bit iteration is mishandled. In a number of places bitmaps are being used by the hypervisor to track certain state. Iteration over all bits involves functions which may misbehave in certain corner cases: On 32-bit Arm accesses to bitmaps with bit a count which is a multiple of 32, an out of bounds access may occur. A malicious guest may cause a hypervisor crash or hang, resulting in a Denial of Service (DoS). All versions of Xen are vulnerable. 32-bit Arm systems are vulnerable. 64-bit Arm systems are not vulnerable.
Red Hat
xen: bit iteration mishandling allows Arm guest OS users to cause a DoS
vendor_redhat·2020-02-10·CVSS 6.5
CVE-2019-19581 [MEDIUM] CWE-119 xen: bit iteration mishandling allows Arm guest OS users to cause a DoS
xen: bit iteration mishandling allows Arm guest OS users to cause a DoS
An issue was discovered in Xen through 4.12.x allowing 32-bit Arm guest OS users to cause a denial of service (out-of-bounds access) because certain bit iteration is mishandled. In a number of places bitmaps are being used by the hypervisor to track certain state. Iteration over all bits involves functions which may misbehave in certain corner cases: On 32-bit Arm accesses to bitmaps with bit a count which is a multiple of 32, an out of bounds access may occur. A malicious guest may cause a hypervisor crash or hang, resulting in a Denial of Service (DoS). All versions of Xen are vulnerable. 32-bit Arm systems are vulnerable. 64-bit Arm systems are not vulnerable.
Package: kernel-xen (Red Hat Enterprise Linux 5) - Not
Debian
CVE-2019-19581: xen - An issue was discovered in Xen through 4.12.x allowing 32-bit Arm guest OS users...
vendor_debian·2019·CVSS 6.5
CVE-2019-19581 [MEDIUM] CVE-2019-19581: xen - An issue was discovered in Xen through 4.12.x allowing 32-bit Arm guest OS users...
An issue was discovered in Xen through 4.12.x allowing 32-bit Arm guest OS users to cause a denial of service (out-of-bounds access) because certain bit iteration is mishandled. In a number of places bitmaps are being used by the hypervisor to track certain state. Iteration over all bits involves functions which may misbehave in certain corner cases: On 32-bit Arm accesses to bitmaps with bit a count which is a multiple of 32, an out of bounds access may occur. A malicious guest may cause a hypervisor crash or hang, resulting in a Denial of Service (DoS). All versions of Xen are vulnerable. 32-bit Arm systems are vulnerable. 64-bit Arm systems are not vulnerable.
Scope: local
bookworm: resolved (fixed in 4.11.3+24-g14b62ab3e5-1)
bullseye: resolved (fixed in 4.11.3+24-g14b62ab3e5-1)
forky:
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2019-19581 xen: bit iteration mishandling allows Arm guest OS users to cause a DoS [fedora-all]
bugzilla·2020-02-10·CVSS 6.5
CVE-2019-19581 [MEDIUM] CVE-2019-19581 xen: bit iteration mishandling allows Arm guest OS users to cause a DoS [fedora-all]
CVE-2019-19581 xen: bit iteration mishandling allows Arm guest OS users to cause a DoS [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multi
Bugzilla
CVE-2019-19581 xen: bit iteration mishandling allows Arm guest OS users to cause a DoS
bugzilla·2020-02-10·CVSS 6.5
CVE-2019-19581 [MEDIUM] CVE-2019-19581 xen: bit iteration mishandling allows Arm guest OS users to cause a DoS
CVE-2019-19581 xen: bit iteration mishandling allows Arm guest OS users to cause a DoS
An issue was discovered in Xen through 4.12.x allowing 32-bit Arm guest OS users to cause a DoS (out-of-bounds access) because certain bit iteration is mishandled. In a number of places bitmaps are being used by the hypervisor to track certain state. Iteration over all bits involves functions which may misbehave in certain corner cases. 64-bit Arm systems are not vulnerable.
External Reference:
https://xenbits.xen.org/xsa/advisory-307.html
Discussion:
Created xen tracking bugs for this issue:
Affects: fedora-all [bug 1801084]
http://lists.opensuse.org/opensuse-security-announce/2020-01/msg00011.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/34HBFTYNMQMWIO2GGK7DB6KV4M6R5YPV/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D5R73AYE53QA32KTMHUVKCX6E52CIS43/https://seclists.org/bugtraq/2020/Jan/21https://security.gentoo.org/glsa/202003-56https://www.debian.org/security/2020/dsa-4602https://xenbits.xen.org/xsa/advisory-307.htmlhttp://lists.opensuse.org/opensuse-security-announce/2020-01/msg00011.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/34HBFTYNMQMWIO2GGK7DB6KV4M6R5YPV/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/D5R73AYE53QA32KTMHUVKCX6E52CIS43/https://seclists.org/bugtraq/2020/Jan/21https://security.gentoo.org/glsa/202003-56https://www.debian.org/security/2020/dsa-4602https://xenbits.xen.org/xsa/advisory-307.html
2019-12-11
Published