CVE-2021-3592
Published: 15 June 2021
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the bootp_input() function and could occur while processing a udp packet that is smaller than the size of the 'bootp_t' structure. A malicious guest could use this flaw to leak 10 bytes of uninitialized heap memory from the host. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0.
Notes
| Author | Note |
|---|---|
| mdeslaur | patches for this introduced a regression that was fixed in 4.6.1 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
libslirp Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Released
(4.1.0-2ubuntu2.2)
|
|
| groovy |
Released
(4.3.1-1ubuntu0.1)
|
|
| hirsute |
Released
(4.4.0-1ubuntu0.1)
|
|
| impish |
Released
(4.4.0-1ubuntu0.21.10.1)
|
|
| jammy |
Released
(4.6.1-1)
|
|
| kinetic |
Released
(4.6.1-1)
|
|
| lunar |
Released
(4.6.1-1)
|
|
| mantic |
Released
(4.6.1-1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Ignored
(end of standard support)
|
|
|
Patches: upstream: https://gitlab.freedesktop.org/slirp/libslirp/-/commit/93e645e72a056ec0b2c16e0299fc5c6b94e4ca17 upstream: https://gitlab.freedesktop.org/slirp/libslirp/-/commit/f13cad45b25d92760bb0ad67bec0300a4d7d5275 upstream: https://gitlab.freedesktop.org/slirp/libslirp/-/commit/2eca0838eee1da96204545e22cdaed860d9d7c6c upstream: https://gitlab.freedesktop.org/slirp/libslirp/-/commit/c9f314f6e315a5518432761fea864196a290f799 |
||
|
qemu Launchpad, Ubuntu, Debian |
bionic |
Released
(1:2.11+dfsg-1ubuntu7.37)
|
| focal |
Not vulnerable
(uses system libslirp)
|
|
| groovy |
Not vulnerable
(uses system libslirp)
|
|
| hirsute |
Not vulnerable
(uses system libslirp)
|
|
| impish |
Not vulnerable
(uses system libslirp)
|
|
| jammy |
Not vulnerable
(uses system libslirp)
|
|
| kinetic |
Not vulnerable
(uses system libslirp)
|
|
| lunar |
Not vulnerable
(uses system libslirp)
|
|
| mantic |
Not vulnerable
(uses system libslirp)
|
|
| trusty |
Needed
|
|
| upstream |
Needs triage
|
|
| xenial |
Needed
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 3.8 |
| Attack vector | Local |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Changed |
| Confidentiality | Low |
| Integrity impact | None |
| Availability impact | None |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N |