CVE-2021-3595
Published: 15 June 2021
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the size of the 'tftp_t' structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0.
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)
|
|
| lunar |
Released
(4.6.1-1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Needs triage
|
|
| xenial |
Ignored
(end of standard support)
|
|
| impish |
Released
(4.4.0-1ubuntu0.21.10.1)
|
|
| jammy |
Released
(4.6.1-1)
|
|
| kinetic |
Released
(4.6.1-1)
|
|
|
Patches: upstream: https://gitlab.freedesktop.org/slirp/libslirp/-/commit/93e645e72a056ec0b2c16e0299fc5c6b94e4ca17 (v4.6.0) upstream: https://gitlab.freedesktop.org/slirp/libslirp/-/commit/3f17948137155f025f7809fdc38576d5d2451c3d (v4.6.0) upstream: https://gitlab.freedesktop.org/slirp/libslirp/-/commit/990163cf3ac86b7875559f49602c4d76f46f6f30 (v4.6.0) |
||
|
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)
|
|
| lunar |
Not vulnerable
(uses system libslirp)
|
|
| upstream |
Needs triage
|
|
| jammy |
Not vulnerable
(uses system libslirp)
|
|
| kinetic |
Not vulnerable
(uses system libslirp)
|
|
| trusty |
Needed
|
|
| 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 |