Description: "A flaw was found in avahi in versions 0.6 up to 0.8. The event used to signal the termination of the client connection on the avahi Unix socket is not correctly handled in the client_work function, allowing a local attacker to trigger an infinite loop. The highest threat from this vulnerability is to the availability of the avahi service, which becomes unresponsive after this flaw is triggered."
*** Bug 798117 has been marked as a duplicate of this bug. ***
CVE-2021-3502: A flaw was found in avahi 0.8-5. A reachable assertion is present in avahi_s_host_name_resolver_start function allowing a local attacker to crash the avahi service by requesting hostname resolutions through the avahi socket or dbus methods for invalid hostnames. The highest threat from this vulnerability is to the service availability. Patch: https://github.com/lathiat/avahi/commit/fd482a74625b8db8547b8cfca3ee3d3c6c721423
CVE-2021-36217: Avahi 0.8 allows a local denial of service (NULL pointer dereference and daemon crash) against avahi-daemon via the D-Bus interface or a "ping .local" command. Unreleased patch: https://github.com/lathiat/avahi/commit/9d31939e55280a733d930b15ac9e4dda4497680c
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The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=ca40d8f1bbfd62625a223896fefe4cc0d5284175 commit ca40d8f1bbfd62625a223896fefe4cc0d5284175 Author: Federico Denkena <federico.denkena@posteo.de> AuthorDate: 2022-06-21 15:33:40 +0000 Commit: Anthony G. Basile <blueness@gentoo.org> CommitDate: 2022-08-18 13:21:57 +0000 Patches for net-dns/avahi These patches were pulled from the avahi upstream to fix a vulnerability and other bugs. Bug: https://bugs.gentoo.org/793953 Signed-off-by: Federico Denkena <federico.denkena@posteo.de> Signed-off-by: Anthony G. Basile <blueness@gentoo.org> net-dns/avahi/avahi-0.8-r6.ebuild | 217 +++++++++++++++++++++ .../avahi/files/avahi-0.8-dependency-error.patch | 15 ++ .../files/avahi-0.8-disable-avahi-ui-sharp.patch | 12 -- .../avahi/files/avahi-0.8-null-pointer-crash.patch | 129 ++++++++++++ .../avahi-0.8-potentially-undefined-fix.patch | 25 +++ 5 files changed, 386 insertions(+), 12 deletions(-)
(In reply to Larry the Git Cow from comment #10) > The bug has been referenced in the following commit(s): > > https://gitweb.gentoo.org/repo/gentoo.git/commit/ > ?id=ca40d8f1bbfd62625a223896fefe4cc0d5284175 > > commit ca40d8f1bbfd62625a223896fefe4cc0d5284175 > Author: Federico Denkena <federico.denkena@posteo.de> > AuthorDate: 2022-06-21 15:33:40 +0000 > Commit: Anthony G. Basile <blueness@gentoo.org> > CommitDate: 2022-08-18 13:21:57 +0000 > > Patches for net-dns/avahi > > These patches were pulled from the avahi upstream to fix a vulnerability > and other bugs. > Bug: https://bugs.gentoo.org/793953 > Signed-off-by: Federico Denkena <federico.denkena@posteo.de> > Signed-off-by: Anthony G. Basile <blueness@gentoo.org> > > net-dns/avahi/avahi-0.8-r6.ebuild | 217 > +++++++++++++++++++++ > .../avahi/files/avahi-0.8-dependency-error.patch | 15 ++ > .../files/avahi-0.8-disable-avahi-ui-sharp.patch | 12 -- > .../avahi/files/avahi-0.8-null-pointer-crash.patch | 129 ++++++++++++ > .../avahi-0.8-potentially-undefined-fix.patch | 25 +++ > 5 files changed, 386 insertions(+), 12 deletions(-) Seems like this only fixes CVE-2021-3502/CVE-2021-36217 (which appear to be duplicates)
PR is finally merged! https://github.com/lathiat/avahi/pull/330 Patch is: https://github.com/lathiat/avahi/commit/6e72b8436b75481c8fd78b434d91b43c459e11e3
CVE-2023-1981 (https://github.com/lathiat/avahi/issues/375): A vulnerability was found in the avahi library. This flaw allows an unprivileged user to make a dbus call, causing the avahi daemon to crash. Unreleased patch is: https://github.com/lathiat/avahi/commit/92e4419e1ccb76b93358f47f46662298da4183bf
Redhat has, unhelpfully, not adding all of the upstream references to the CVEs, but they seem all fixed upstream. CVE-2023-38473: A vulnerability was found in Avahi. A reachable assertion exists in the avahi_alternative_host_name() function. Merged PR: https://github.com/lathiat/avahi/pull/486 CVE-2023-38470: A vulnerability was found in Avahi. A reachable assertion exists in the avahi_escape_label() function. Merged PR: https://github.com/lathiat/avahi/pull/457 CVE-2023-38469: A vulnerability was found in Avahi, where a reachable assertion exists in avahi_dns_packet_append_record. Merged PR: https://github.com/lathiat/avahi/pull/500 CVE-2023-38471: A vulnerability was found in Avahi. A reachable assertion exists in the dbus_set_host_name function. Merged PR: https://github.com/lathiat/avahi/pull/494 CVE-2023-38472: A vulnerability was found in Avahi. A reachable assertion exists in the avahi_rdata_parse() function. Merged PR: https://github.com/lathiat/avahi/pull/490 Worth noting that someone's asked for a release to be made: https://github.com/lathiat/avahi/issues/503
