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attackerkbAttackerKBAKB:C5CC4A41-B317-4A5B-9310-C01A4499BC3C
HistoryApr 02, 2020 - 12:00 a.m.

CVE-2020-11100

2020-04-0200:00:00
attackerkb.com
11

0.028 Low

EPSS

Percentile

90.7%

JSON

In hpack_dht_insert in hpack-tbl.c in the HPACK decoder in HAProxy 1.8 through 2.x before 2.1.4, a remote attacker can write arbitrary bytes around a certain location on the heap via a crafted HTTP/2 request, possibly causing remote code execution.

Recent assessments:

3dcyber at April 23, 2020 1:18pm UTC reported:

This vulnerability affects HAProxy and does not require prior authentication as indicated by the CVSS score. Hopefully there is an update to the CVSS.

This vulnerability allows RCE when HTTP2 is enabled on HAProxy. There is a PoC exploit created by the researcher who discovered the vulnerability.

Note that in some solutions HTTP2 on HAProxy may be enabled by default.

To defend against this vulnerability:

  • HAproxy patches can be applied.

  • As workaroud you can disable HTTP2.

Assessed Attacker Value: 4
Assessed Attacker Value: 4Assessed Attacker Value: 4

References

Related

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0.028 Low

EPSS

Percentile

90.7%

JSON
Related for AKB:C5CC4A41-B317-4A5B-9310-C01A4499BC3C
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