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CVE-2024-45797

LibHTP's unbounded header handling leads to denial service

7.5 HighFix available

LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Prior to version 0.5.49, unbounded processing of HTTP request and response headers can lead to excessive CPU time and memory utilization, possibly leading to extreme slowdowns. This issue is addressed in 0.5.49.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.73%Up 0.7 points since Oct 17, 2024
90%50%10%1%

What each source reports

CVE List Score used 7.5

LibHTP's unbounded header handling leads to denial service

LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Prior to version 0.5.49, unbounded processing of HTTP request and response headers can lead to excessive CPU time and memory utilization, possibly leading to extreme slowdowns. This issue is addressed in 0.5.49.

Record
CVE-2024-45797
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-02
EUVDEUVD-2024-41605 7.5

LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Prior to version 0.5.49, unbounded processing of HTTP request and response headers can lead to excessive CPU time and memory utilization, possibly leading to extreme slowdowns. This issue is addressed in 0.5.49.

Record
EUVD-2024-41605
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
NVD 7.5

LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Prior to version 0.5.49, unbounded processing of HTTP request and response headers can lead to excessive CPU time and memory utilization, possibly leading to extreme slowdowns. This issue is addressed in 0.5.49.

Record
CVE-2024-45797
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-02
OSVALPINE-CVE-2024-45797 7.5

LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Prior to version 0.5.49, unbounded processing of HTTP request and response headers can lead to excessive CPU time and memory utilization, possibly leading to extreme slowdowns. This issue is addressed in 0.5.49.

Record
ALPINE-CVE-2024-45797
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
OSV 7.5

LibHTP's unbounded header handling leads to denial service

LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Prior to version 0.5.49, unbounded processing of HTTP request and response headers can lead to excessive CPU time and memory utilization, possibly leading to extreme slowdowns. This issue is addressed in 0.5.49.

Record
CVE-2024-45797
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-770
Updated
2026-11-02
OSVDEBIAN-CVE-2024-45797 7.5

LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Prior to version 0.5.49, unbounded processing of HTTP request and response headers can lead to excessive CPU time and memory utilization, possibly leading to extreme slowdowns. This issue is addressed in 0.5.49.

Record
DEBIAN-CVE-2024-45797
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVUBUNTU-CVE-2024-45797 7.5

LibHTP is a security-aware parser for the HTTP protocol and the related bits and pieces. Prior to version 0.5.49, unbounded processing of HTTP request and response headers can lead to excessive CPU time and memory utilization, possibly leading to extreme slowdowns. This issue is addressed in 0.5.49.

Record
UBUNTU-CVE-2024-45797
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVMGASA-2026-0181 No score

Updated suricata packages fix security vulnerabilities

Various security, performance, accuracy, and stability issues have been fixed, plus we have moved to a supported version.

Record
MGASA-2026-0181
Updated
2026-11-02
OSVopenSUSE-SU-2025:15394-1 No score

libsuricata8_0_0-8.0.0-1.1 on GA media

These are all security issues fixed in the libsuricata8_0_0-8.0.0-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2025:15394-1
Updated
2026-11-02
OSVUSN-7814-1 No score

libhtp vulnerabilities

It was discovered that LibHTP did not correctly handle certain HTTP headers. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2024-23837)

It was discovered that LibHTP did not correctly parse certain HTTP requests. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS and Ubuntu 24.04 LTS. (CVE-2024-28871)

It was discovered that LibHTP did not correctly parse certain HTTP requests. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2024-45797)

It was discovered that LibHTP did not correctly handle certain memory operations. A remote attacker could possibly use this issue to cause a denial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS and Ubuntu 25.04. (CVE-2025-53537)

Record
USN-7814-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
suricata
Alpine:v3.20
 before 7.0.7-r0
7.0.7-r0
suricata
Alpine:v3.21
 before 7.0.7-r0
7.0.7-r0
suricata
Alpine:v3.22
 before 7.0.7-r0
7.0.7-r0
suricata
Alpine:v3.23
 before 7.0.7-r0
7.0.7-r0
suricata
Alpine:v3.24
 before 7.0.7-r0
7.0.7-r0
libhtp
Debian:12
 before 1:0.5.42-1+deb12u1, plus listed versions
1:0.5.42-1
1:0.5.42-1+deb12u1
libhtp
Debian:13
 before 1:0.5.49-1
1:0.5.49-1
libhtp
Debian:11
From an advisory covering 2 CVEs
 before 1:0.5.36-1+deb11u1, plus listed versions
1:0.5.36-1
1:0.5.36-1+deb11u1
suricata
Mageia:9
From an advisory covering 14 CVEs
 before 7.0.10-1.mga9
7.0.10-1.mga9
libhtp
Ubuntu:Pro:16.04:LTS
 before 0.5.15-1ubuntu0.1~esm1, plus listed versions
0.5.15-1
0.5.15-1ubuntu0.1~esm1
Show 10 moreShow less
Affected packages
PackageAffectedFixed
libhtp
Ubuntu:Pro:18.04:LTS
 before 1:0.5.26-1ubuntu0.1~esm1, plus listed versions
1:0.5.25-11:0.5.26-1
1:0.5.26-1ubuntu0.1~esm1
libhtp
Ubuntu:Pro:20.04:LTS
 before 1:0.5.32-1ubuntu0.1~esm1, plus listed versions
1:0.5.30-11:0.5.31-11:0.5.32-1
1:0.5.32-1ubuntu0.1~esm1
libhtp
Ubuntu:Pro:22.04:LTS
 before 1:0.5.39-1ubuntu0.1~esm1, plus listed versions
1:0.5.36-11:0.5.38-11:0.5.39-1
1:0.5.39-1ubuntu0.1~esm1
libhtp
Ubuntu:Pro:24.04:LTS
 before 1:0.5.46-1ubuntu2+esm1, plus listed versions
1:0.5.45-11:0.5.46-1ubuntu11:0.5.46-1ubuntu2
1:0.5.46-1ubuntu2+esm1
libhtp
Ubuntu:Pro:16.04:LTS
From an advisory covering 4 CVEs
 before 0.5.15-1ubuntu0.1~esm1, plus listed versions
0.5.15-1
0.5.15-1ubuntu0.1~esm1
libhtp
Ubuntu:Pro:18.04:LTS
From an advisory covering 4 CVEs
 before 1:0.5.26-1ubuntu0.1~esm1, plus listed versions
1:0.5.25-11:0.5.26-1
1:0.5.26-1ubuntu0.1~esm1
libhtp
Ubuntu:Pro:20.04:LTS
From an advisory covering 4 CVEs
 before 1:0.5.32-1ubuntu0.1~esm1, plus listed versions
1:0.5.30-11:0.5.31-11:0.5.32-1
1:0.5.32-1ubuntu0.1~esm1
libhtp
Ubuntu:Pro:22.04:LTS
From an advisory covering 4 CVEs
 before 1:0.5.39-1ubuntu0.1~esm1, plus listed versions
1:0.5.36-11:0.5.38-11:0.5.39-1
1:0.5.39-1ubuntu0.1~esm1
libhtp
Ubuntu:Pro:24.04:LTS
From an advisory covering 4 CVEs
 before 1:0.5.46-1ubuntu2+esm1, plus listed versions
1:0.5.45-11:0.5.46-1ubuntu11:0.5.46-1ubuntu2
1:0.5.46-1ubuntu2+esm1
suricata
openSUSE:Tumbleweed
From an advisory covering 30 CVEs
 before 8.0.0-1.1
8.0.0-1.1

History

History
RecordedChangedSources
affected, facts
affected, aliases, referencesOSV
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2024-45797 is a high vulnerability (CVSS 7.5) in Oisf Libhtp, published October 16, 2024. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.73%, the 54th percentile. Fixed in suricata 7.0.7-r0.

References

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