https://bugzilla.redhat.com/show_bug.cgi?id=1806835
Bug ID: 1806835
Summary: CVE-2020-1935 tomcat: HTTP Request Smuggling
Product: Security Response
Hardware: All
OS: Linux
Status: NEW
Component: vulnerability
Keywords: Security
Severity: low
Priority: low
Assignee: security-response-team(a)redhat.com
Reporter: jwon(a)redhat.com
CC: aboyko(a)redhat.com, aileenc(a)redhat.com,
akoufoud(a)redhat.com, alazarot(a)redhat.com,
alee(a)redhat.com, almorale(a)redhat.com,
anstephe(a)redhat.com, asoldano(a)redhat.com,
atangrin(a)redhat.com, avibelli(a)redhat.com,
bbaranow(a)redhat.com, bgeorges(a)redhat.com,
bmaxwell(a)redhat.com, brian.stansberry(a)redhat.com,
cdewolf(a)redhat.com, chazlett(a)redhat.com,
cmoulliard(a)redhat.com, coolsvap(a)gmail.com,
csutherl(a)redhat.com, darran.lofthouse(a)redhat.com,
dbecker(a)redhat.com, dkreling(a)redhat.com,
dosoudil(a)redhat.com, drieden(a)redhat.com,
etirelli(a)redhat.com, ggaughan(a)redhat.com,
gzaronik(a)redhat.com, ibek(a)redhat.com,
ikanello(a)redhat.com, ivan.afonichev(a)gmail.com,
iweiss(a)redhat.com, janstey(a)redhat.com,
java-sig-commits(a)lists.fedoraproject.org,
jawilson(a)redhat.com, jbalunas(a)redhat.com,
jclere(a)redhat.com, jjoyce(a)redhat.com,
jochrist(a)redhat.com, jpallich(a)redhat.com,
jperkins(a)redhat.com, jschluet(a)redhat.com,
jstastny(a)redhat.com, jwon(a)redhat.com,
kbasil(a)redhat.com, krathod(a)redhat.com,
krzysztof.daniel(a)gmail.com, kverlaen(a)redhat.com,
kwills(a)redhat.com, lgao(a)redhat.com, lhh(a)redhat.com,
lpeer(a)redhat.com, lthon(a)redhat.com,
mbabacek(a)redhat.com, mburns(a)redhat.com,
mkolesni(a)redhat.com, mnovotny(a)redhat.com,
msochure(a)redhat.com, msvehla(a)redhat.com,
mszynkie(a)redhat.com, myarboro(a)redhat.com,
nwallace(a)redhat.com, paradhya(a)redhat.com,
pgallagh(a)redhat.com, pjindal(a)redhat.com,
pmackay(a)redhat.com, psotirop(a)redhat.com,
rguimara(a)redhat.com, rrajasek(a)redhat.com,
rruss(a)redhat.com, rsvoboda(a)redhat.com,
rsynek(a)redhat.com, sclewis(a)redhat.com,
scohen(a)redhat.com, sdaley(a)redhat.com,
slinaber(a)redhat.com, smaestri(a)redhat.com,
tom.jenkinson(a)redhat.com, weli(a)redhat.com
Target Milestone: ---
Classification: Other
The HTTP header parsing code used an approach to end-of-line (EOL) parsing that
allowed some invalid HTTP headers to be parsed as valid. This led to a
possibility of HTTP Request Smuggling if Tomcat was located behind a reverse
proxy that incorrectly handled the invalid Transfer-Encoding header in a
particular manner. Such a reverse proxy is considered unlikely.
It affects the version of Apache Tomcat 9 before 9.0.31, Tomcat 8 before
8.5.51, and Tomcat 7 before 7.0.100.
Upstream Patches:
https://github.com/apache/tomcat/commit/8bfb0ff / tomcat9
https://github.com/apache/tomcat/commit/8fbe2e9 / tomcat8
https://github.com/apache/tomcat/commit/702bf15 / tomcat7
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