https://bugzilla.redhat.com/show_bug.cgi?id=1908837
Bug ID: 1908837
Summary: CVE-2020-26259 XStream: arbitrary file deletion on the
local host when unmarshalling
Product: Security Response
Hardware: All
OS: Linux
Status: NEW
Component: vulnerability
Keywords: Security
Severity: medium
Priority: medium
Assignee: security-response-team(a)redhat.com
Reporter: gsuckevi(a)redhat.com
CC: abenaiss(a)redhat.com, aileenc(a)redhat.com,
akoufoud(a)redhat.com, alazarot(a)redhat.com,
almorale(a)redhat.com, anstephe(a)redhat.com,
aos-bugs(a)redhat.com, ataylor(a)redhat.com,
bibryam(a)redhat.com, bmontgom(a)redhat.com,
chazlett(a)redhat.com, dchen(a)redhat.com,
drieden(a)redhat.com, eparis(a)redhat.com,
etirelli(a)redhat.com, ganandan(a)redhat.com,
ggaughan(a)redhat.com, gmalinko(a)redhat.com,
gvarsami(a)redhat.com, hbraun(a)redhat.com,
ibek(a)redhat.com, janstey(a)redhat.com,
java-maint(a)redhat.com,
java-sig-commits(a)lists.fedoraproject.org,
jburrell(a)redhat.com, jcoleman(a)redhat.com,
jochrist(a)redhat.com, jokerman(a)redhat.com,
jolee(a)redhat.com, jschatte(a)redhat.com,
jstastny(a)redhat.com, jwon(a)redhat.com,
kaycoth(a)redhat.com, kconner(a)redhat.com,
krathod(a)redhat.com, kverlaen(a)redhat.com,
ldimaggi(a)redhat.com, lkundrak(a)v3.sk,
mizdebsk(a)redhat.com, mnovotny(a)redhat.com,
nstielau(a)redhat.com, nwallace(a)redhat.com,
pantinor(a)redhat.com, pbhattac(a)redhat.com,
pjindal(a)redhat.com, rrajasek(a)redhat.com,
rsynek(a)redhat.com, rwagner(a)redhat.com,
sdaley(a)redhat.com, sponnaga(a)redhat.com,
tcunning(a)redhat.com, tkirby(a)redhat.com,
vbobade(a)redhat.com, vhalbert(a)redhat.com
Target Milestone: ---
Classification: Other
XStream is a Java library to serialize objects to XML and back again. In
XStream before version 1.4.15, is vulnerable to an Arbitrary File Deletion on
the local host when unmarshalling. The vulnerability may allow a remote
attacker to delete arbitrary know files on the host as log as the executing
process has sufficient rights only by manipulating the processed input stream.
If you rely on XStream's default blacklist of the Security Framework, you will
have to use at least version 1.4.15. The reported vulnerability does not exist
running Java 15 or higher. No user is affected, who followed the recommendation
to setup XStream's Security Framework with a whitelist! Anyone relying on
XStream's default blacklist can immediately switch to a whilelist for the
allowed types to avoid the vulnerability. Users of XStream 1.4.14 or below who
still want to use XStream default blacklist can use a workaround described in
more detailed in the referenced advisories.
References:
https://github.com/x-stream/xstream/security/advisories/GHSA-jfvx-7wrx-43fh
https://x-stream.github.io/CVE-2020-26259.html
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