Debian update for trafficserver

Published: 2021-08-17

Risk	High
Patch available	YES
Number of vulnerabilities	5
CVE-ID	CVE-2021-27577 CVE-2021-32566 CVE-2021-32567 CVE-2021-35474 CVE-2021-32565
CWE-ID	CWE-20 CWE-399 CWE-121 CWE-444
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	trafficserver (Debian package) Operating systems & Components / Operating system package or component
Vendor	Debian

Security Bulletin

This security bulletin contains information about 5 vulnerabilities.

1) Input validation error

EUVDB-ID: #VU54461

Risk: Medium

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-27577

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to poison web server cache.

The vulnerability exists due to insufficient validation of user-supplied input when handling URL fragmentation. A remote attacker can send specially crafted HTTP request and poison the web server cache.

Mitigation

Update trafficserver package to version 8.0.2+ds-1+deb10u5.

Vulnerable software versions

trafficserver (Debian package): 8.0.0-1 - 8.0.8+ds-2

CPE2.3

External links

http://www.debian.org/security/2021/dsa-4957

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Input validation error

EUVDB-ID: #VU54462

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-32566

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input when processing HTTP/2 requests. A remote attacker can send a specially crafted sequence of HTTP/2 frames and perform a denial of service (DoS) attack.

Mitigation

Update trafficserver package to version 8.0.2+ds-1+deb10u5.

Vulnerable software versions

trafficserver (Debian package): 8.0.0-1 - 8.0.8+ds-2

CPE2.3

External links

http://www.debian.org/security/2021/dsa-4957

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Resource management error

EUVDB-ID: #VU54463

Risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-32567

CWE-ID: CWE-399 - Resource Management Errors

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper management of internal resources within the application when processing HTTP/2 frames. A remote attacker can pass specially crafted data to the application and perform a denial of service (DoS) attack.

Mitigation

Update trafficserver package to version 8.0.2+ds-1+deb10u5.

Vulnerable software versions

trafficserver (Debian package): 8.0.0-1 - 8.0.8+ds-2

CPE2.3

External links

http://www.debian.org/security/2021/dsa-4957

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Stack-based buffer overflow

EUVDB-ID: #VU54464

Risk: High

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-35474

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the cachekey plugin. A remote unauthenticated attacker can send specially crafted traffic to the application, trigger a stack-based buffer overflow and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update trafficserver package to version 8.0.2+ds-1+deb10u5.

Vulnerable software versions

trafficserver (Debian package): 8.0.0-1 - 8.0.8+ds-2

CPE2.3

External links

http://www.debian.org/security/2021/dsa-4957

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Inconsistent interpretation of HTTP requests

EUVDB-ID: #VU54459

Risk: Medium

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-32565

CWE-ID: CWE-444 - Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling')

Exploit availability: No

Description

The vulnerability allows a remote attacker to preform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests when processing Content-Length header. A remote attacker can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.

Mitigation

Update trafficserver package to version 8.0.2+ds-1+deb10u5.

Vulnerable software versions

trafficserver (Debian package): 8.0.0-1 - 8.0.8+ds-2

CPE2.3

External links

http://www.debian.org/security/2021/dsa-4957

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.