https://bugzilla.redhat.com/show_bug.cgi?id=1908832
Bug ID: 1908832
Summary: CVE-2020-26258 XStream: Server-Side Forgery Request
vulnerability can be activated 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, a Server-Side Forgery Request vulnerability can
be activated when unmarshalling. The vulnerability may allow a remote attacker
to request data from internal resources that are not publicly available 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 if 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-4cch-wxpw-8p28
https://x-stream.github.io/CVE-2020-26258.html
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