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CVE

GHSA-fx2c-96vj-985v

HAProxyMessageDecoder Stack Exhaustion DoS
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CVE

GHSA-fx2c-96vj-985v

HAProxyMessageDecoder Stack Exhaustion DoS

Impact

A StackOverflowError can be raised when parsing a malformed crafted message due to an infinite recursion.

Patches

Users should upgrade to 4.1.86.Final.

Workarounds

There is no workaround, except using a custom HaProxyMessageDecoder.

References

When parsing a TLV with type = PP2TYPESSL, the value can be again a TLV with type = PP2TYPESSL and so on.

The only limitation of the recursion is that the TLV length cannot be bigger than 0xffff because it is encoded in an unsigned short type.

Providing a TLV with a nesting level that is large enough will lead to raising of a StackOverflowError.

The StackOverflowError will be caught if HAProxyMessageDecoder is used as part of Netty’s ChannelPipeline, but using it directly without the ChannelPipeline will lead to a thrown exception / crash.

​

For more information

If you have any questions or comments about this advisory:

Package Versions Affected

Package Version
patch Availability
io.netty:netty-all 4.1.68.Final
Available
Unavailable
io.netty:netty-all 4.1.46.Final
Available
Unavailable

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
5.3
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Related Resources

No items found.

References

https://github.com/netty/netty/security/advisories/GHSA-fx2c-96vj-985v, https://nvd.nist.gov/vuln/detail/CVE-2022-41881, https://github.com/netty/netty, https://lists.debian.org/debian-lts-announce/2023/01/msg00008.html, https://security.netapp.com/advisory/ntap-20230113-0004, https://www.debian.org/security/2023/dsa-5316

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0.00118%
EPSS Percentile
0.31443%
Introduced Version
4.1.12.Final
Fix Available
4.1.86.Final

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