Debian Bug report logs -
#895245
libxml2: CVE-2017-18258: Set memory limit for LZMA decompression
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Bug#895245
; Package src:libxml2
.
(Sun, 08 Apr 2018 19:21:04 GMT) (full text, mbox, link).
Acknowledgement sent
to Salvatore Bonaccorso <carnil@debian.org>
:
New Bug report received and forwarded. Copy sent to carnil@debian.org, team@security.debian.org, team@security.debian.org, Debian XML/SGML Group <debian-xml-sgml-pkgs@lists.alioth.debian.org>
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(Sun, 08 Apr 2018 19:21:04 GMT) (full text, mbox, link).
Message #5 received at submit@bugs.debian.org (full text, mbox, reply):
Source: libxml2
Version: 2.9.1+dfsg1-5
Severity: important
Tags: patch security upstream
Forwarded: https://bugzilla.gnome.org/show_bug.cgi?id=786696
Control: fixed -1 2.9.7+dfsg-1
Control: block -1 by 895195
Hi,
The following vulnerability was published for libxml2.
CVE-2017-18258[0]:
| The xz_head function in xzlib.c in libxml2 before 2.9.6 allows remote
| attackers to cause a denial of service (memory consumption) via a
| crafted LZMA file, because the decoder functionality does not restrict
| memory usage to what is required for a legitimate file.
If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.
It's important though to not apply the upstream commit
e2a9122b8dde53d320750451e9907a7dcb2ca8bb without adressing the
upstream issue https://bugzilla.gnome.org/show_bug.cgi?id=794914
(otherwise libxml2 will be opened to CVE-2018-9251 as it is now the
case for the libxml2 upload to experimental, thus i added a block to
indicate that).
For further information see:
[0] https://security-tracker.debian.org/tracker/CVE-2017-18258
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-18258
[1] https://bugzilla.gnome.org/show_bug.cgi?id=786696
[2] https://git.gnome.org/browse/libxml2/commit/?id=e2a9122b8dde53d320750451e9907a7dcb2ca8bb
Regards,
Salvatore
Marked as fixed in versions libxml2/2.9.7+dfsg-1.
Request was from Salvatore Bonaccorso <carnil@debian.org>
to submit@bugs.debian.org
.
(Sun, 08 Apr 2018 19:21:04 GMT) (full text, mbox, link).
Added blocking bug(s) of 895245: 895195
Request was from Salvatore Bonaccorso <carnil@debian.org>
to submit@bugs.debian.org
.
(Sun, 08 Apr 2018 19:21:05 GMT) (full text, mbox, link).
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